/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/hard2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 06:18:36,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 06:18:36,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 06:18:36,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 06:18:36,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 06:18:36,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 06:18:36,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 06:18:36,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 06:18:36,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 06:18:36,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 06:18:36,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 06:18:36,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 06:18:36,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 06:18:36,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 06:18:36,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 06:18:36,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 06:18:36,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 06:18:36,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 06:18:36,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 06:18:36,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 06:18:36,401 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 06:18:36,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 06:18:36,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 06:18:36,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 06:18:36,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 06:18:36,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 06:18:36,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 06:18:36,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 06:18:36,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 06:18:36,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 06:18:36,431 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 06:18:36,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 06:18:36,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 06:18:36,433 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 06:18:36,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 06:18:36,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 06:18:36,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 06:18:36,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 06:18:36,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 06:18:36,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 06:18:36,434 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 06:18:36,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 06:18:36,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 06:18:36,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 06:18:36,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 06:18:36,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 06:18:36,434 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 06:18:36,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 06:18:36,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:18:36,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 06:18:36,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 06:18:36,436 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 06:18:36,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 06:18:36,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 06:18:36,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 06:18:36,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 06:18:36,676 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 06:18:36,678 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 06:18:36,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-03-20 06:18:36,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2048ce122/d6c0700815d24144a9598345935ae4aa/FLAG785e71248 [2022-03-20 06:18:37,085 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 06:18:37,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-03-20 06:18:37,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2048ce122/d6c0700815d24144a9598345935ae4aa/FLAG785e71248 [2022-03-20 06:18:37,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2048ce122/d6c0700815d24144a9598345935ae4aa [2022-03-20 06:18:37,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 06:18:37,503 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 06:18:37,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 06:18:37,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 06:18:37,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 06:18:37,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:18:37" (1/1) ... [2022-03-20 06:18:37,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@443d6811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37, skipping insertion in model container [2022-03-20 06:18:37,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:18:37" (1/1) ... [2022-03-20 06:18:37,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 06:18:37,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 06:18:37,702 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/hard2_unwindbound20.c[526,539] [2022-03-20 06:18:37,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:18:37,730 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 06:18:37,741 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/hard2_unwindbound20.c[526,539] [2022-03-20 06:18:37,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:18:37,766 INFO L208 MainTranslator]: Completed translation [2022-03-20 06:18:37,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37 WrapperNode [2022-03-20 06:18:37,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 06:18:37,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 06:18:37,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 06:18:37,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 06:18:37,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37" (1/1) ... [2022-03-20 06:18:37,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37" (1/1) ... [2022-03-20 06:18:37,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37" (1/1) ... [2022-03-20 06:18:37,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37" (1/1) ... [2022-03-20 06:18:37,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37" (1/1) ... [2022-03-20 06:18:37,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37" (1/1) ... [2022-03-20 06:18:37,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37" (1/1) ... [2022-03-20 06:18:37,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 06:18:37,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 06:18:37,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 06:18:37,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 06:18:37,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37" (1/1) ... [2022-03-20 06:18:37,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:18:37,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:37,853 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 06:18:37,868 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 06:18:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 06:18:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 06:18:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 06:18:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 06:18:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 06:18:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 06:18:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 06:18:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 06:18:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 06:18:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 06:18:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 06:18:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 06:18:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 06:18:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 06:18:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 06:18:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 06:18:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 06:18:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 06:18:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 06:18:37,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 06:18:37,938 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 06:18:37,939 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 06:18:38,076 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 06:18:38,080 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 06:18:38,080 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 06:18:38,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:18:38 BoogieIcfgContainer [2022-03-20 06:18:38,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 06:18:38,082 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 06:18:38,082 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 06:18:38,084 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 06:18:38,086 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:18:38" (1/1) ... [2022-03-20 06:18:38,087 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 06:18:38,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:18:38 BasicIcfg [2022-03-20 06:18:38,100 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 06:18:38,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 06:18:38,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 06:18:38,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 06:18:38,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:18:37" (1/4) ... [2022-03-20 06:18:38,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dec6541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:18:38, skipping insertion in model container [2022-03-20 06:18:38,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:18:37" (2/4) ... [2022-03-20 06:18:38,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dec6541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:18:38, skipping insertion in model container [2022-03-20 06:18:38,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:18:38" (3/4) ... [2022-03-20 06:18:38,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dec6541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:18:38, skipping insertion in model container [2022-03-20 06:18:38,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:18:38" (4/4) ... [2022-03-20 06:18:38,109 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.cJordan [2022-03-20 06:18:38,113 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 06:18:38,113 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 06:18:38,147 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 06:18:38,152 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 06:18:38,152 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 06:18:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 06:18:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 06:18:38,168 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:38,168 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:38,169 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:38,172 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-03-20 06:18:38,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:38,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437781577] [2022-03-20 06:18:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:38,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:38,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:18:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:18:38,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:38,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437781577] [2022-03-20 06:18:38,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437781577] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:38,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:38,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 06:18:38,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909985671] [2022-03-20 06:18:38,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:38,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 06:18:38,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:38,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 06:18:38,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:18:38,366 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:38,439 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-03-20 06:18:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 06:18:38,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 06:18:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:38,446 INFO L225 Difference]: With dead ends: 32 [2022-03-20 06:18:38,446 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 06:18:38,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:18:38,450 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:38,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:18:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 06:18:38,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 06:18:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:18:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-20 06:18:38,480 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-20 06:18:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:38,480 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-20 06:18:38,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-20 06:18:38,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 06:18:38,481 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:38,481 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:38,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 06:18:38,482 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:38,482 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-03-20 06:18:38,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:38,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702773058] [2022-03-20 06:18:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:38,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:38,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:18:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:18:38,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:38,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702773058] [2022-03-20 06:18:38,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702773058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:38,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:38,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:18:38,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428384301] [2022-03-20 06:18:38,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:38,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:18:38,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:18:38,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:38,568 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:38,748 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-03-20 06:18:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 06:18:38,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 06:18:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:38,750 INFO L225 Difference]: With dead ends: 39 [2022-03-20 06:18:38,750 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 06:18:38,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:18:38,751 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:38,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:18:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 06:18:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-20 06:18:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:18:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 06:18:38,758 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-20 06:18:38,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:38,758 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 06:18:38,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 06:18:38,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 06:18:38,759 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:38,759 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:38,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 06:18:38,759 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-03-20 06:18:38,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:38,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773914623] [2022-03-20 06:18:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:38,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:38,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:18:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:18:38,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:38,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773914623] [2022-03-20 06:18:38,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773914623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:38,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:38,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 06:18:38,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390729289] [2022-03-20 06:18:38,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:38,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:38,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:38,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:38,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:38,841 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:38,910 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-03-20 06:18:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 06:18:38,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 06:18:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:38,912 INFO L225 Difference]: With dead ends: 32 [2022-03-20 06:18:38,913 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 06:18:38,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:38,918 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:38,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 06:18:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 06:18:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:18:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 06:18:38,934 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-20 06:18:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:38,934 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 06:18:38,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 06:18:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 06:18:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 06:18:38,935 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:38,935 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:38,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 06:18:38,936 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-03-20 06:18:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:38,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394219233] [2022-03-20 06:18:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:38,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:18:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:39,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 06:18:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:18:39,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:39,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394219233] [2022-03-20 06:18:39,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394219233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:39,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:39,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:18:39,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491676246] [2022-03-20 06:18:39,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:39,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:18:39,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:39,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:18:39,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:39,035 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 06:18:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:39,168 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-03-20 06:18:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 06:18:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-20 06:18:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:39,172 INFO L225 Difference]: With dead ends: 44 [2022-03-20 06:18:39,172 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 06:18:39,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:18:39,177 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:39,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:18:39,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 06:18:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-20 06:18:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:18:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-20 06:18:39,182 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-20 06:18:39,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:39,182 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-20 06:18:39,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 06:18:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-20 06:18:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 06:18:39,183 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:39,183 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:39,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 06:18:39,183 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:39,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:39,184 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-03-20 06:18:39,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:39,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891877970] [2022-03-20 06:18:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:39,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:39,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:39,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649558400] [2022-03-20 06:18:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:39,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:39,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:39,216 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 06:18:39,219 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 06:18:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 06:18:39,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 06:18:39,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:18:39,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:39,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891877970] [2022-03-20 06:18:39,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:39,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649558400] [2022-03-20 06:18:39,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649558400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:39,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:39,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:18:39,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918321431] [2022-03-20 06:18:39,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:39,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:39,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:39,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:39,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:39,435 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 06:18:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:39,481 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-03-20 06:18:39,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:18:39,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 06:18:39,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:39,482 INFO L225 Difference]: With dead ends: 51 [2022-03-20 06:18:39,482 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 06:18:39,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:39,483 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:39,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 06:18:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-20 06:18:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 06:18:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 06:18:39,491 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-20 06:18:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:39,491 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 06:18:39,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 06:18:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 06:18:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 06:18:39,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:39,493 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:39,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 06:18:39,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:39,700 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-03-20 06:18:39,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:39,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18179022] [2022-03-20 06:18:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:39,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:39,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552541621] [2022-03-20 06:18:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:39,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:39,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:39,710 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 06:18:39,716 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 06:18:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:18:39,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:18:39,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:18:39,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18179022] [2022-03-20 06:18:39,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552541621] [2022-03-20 06:18:39,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552541621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:39,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:39,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:18:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258330230] [2022-03-20 06:18:39,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:39,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:39,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:39,849 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:39,878 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-03-20 06:18:39,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:18:39,879 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), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 06:18:39,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:39,883 INFO L225 Difference]: With dead ends: 63 [2022-03-20 06:18:39,883 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 06:18:39,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:39,886 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:39,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 06:18:39,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 06:18:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 06:18:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-20 06:18:39,901 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-20 06:18:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:39,902 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-20 06:18:39,903 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), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-20 06:18:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 06:18:39,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:39,904 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:39,924 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 06:18:40,115 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,SelfDestructingSolverStorable5 [2022-03-20 06:18:40,116 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-03-20 06:18:40,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:40,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314253310] [2022-03-20 06:18:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:40,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:40,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:40,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134971198] [2022-03-20 06:18:40,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:40,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:40,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:40,130 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 06:18:40,132 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 06:18:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:40,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:18:40,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:18:40,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:18:40,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:40,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314253310] [2022-03-20 06:18:40,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:40,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134971198] [2022-03-20 06:18:40,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134971198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:40,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:40,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:18:40,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450754120] [2022-03-20 06:18:40,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:40,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:40,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:40,250 INFO L87 Difference]: Start difference. First operand 62 states and 72 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:40,287 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-20 06:18:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:18:40,287 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 06:18:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:40,289 INFO L225 Difference]: With dead ends: 74 [2022-03-20 06:18:40,289 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 06:18:40,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:18:40,290 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:40,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 06:18:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 06:18:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 06:18:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-20 06:18:40,298 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-20 06:18:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:40,299 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-20 06:18:40,299 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-20 06:18:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 06:18:40,300 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:40,300 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 06:18:40,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 06:18:40,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:40,503 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:40,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-03-20 06:18:40,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:40,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31312654] [2022-03-20 06:18:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:40,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:40,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:40,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438828813] [2022-03-20 06:18:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:40,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:40,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:40,518 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 06:18:40,522 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 06:18:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:40,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:18:40,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 06:18:40,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 06:18:40,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31312654] [2022-03-20 06:18:40,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438828813] [2022-03-20 06:18:40,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438828813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:18:40,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:18:40,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 06:18:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597970334] [2022-03-20 06:18:40,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:18:40,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 06:18:40,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 06:18:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:18:40,722 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 06:18:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:40,782 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2022-03-20 06:18:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 06:18:40,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-03-20 06:18:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:40,784 INFO L225 Difference]: With dead ends: 119 [2022-03-20 06:18:40,787 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 06:18:40,787 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:18:40,788 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:40,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 152 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 06:18:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-03-20 06:18:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 06:18:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-03-20 06:18:40,796 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-03-20 06:18:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:40,796 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-03-20 06:18:40,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 06:18:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-03-20 06:18:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 06:18:40,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:40,797 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:40,822 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 06:18:41,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:41,012 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-03-20 06:18:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:41,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254158439] [2022-03-20 06:18:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:41,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:41,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:41,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976000446] [2022-03-20 06:18:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:41,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:41,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:41,030 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 06:18:41,031 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 06:18:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 06:18:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 06:18:41,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 06:18:41,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:41,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254158439] [2022-03-20 06:18:41,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:41,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976000446] [2022-03-20 06:18:41,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976000446] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 06:18:41,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:18:41,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 06:18:41,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109290141] [2022-03-20 06:18:41,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:41,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:41,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:41,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:41,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 06:18:41,275 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:41,307 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-03-20 06:18:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:18:41,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-03-20 06:18:41,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:41,309 INFO L225 Difference]: With dead ends: 127 [2022-03-20 06:18:41,309 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 06:18:41,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:18:41,310 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:41,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 06:18:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-03-20 06:18:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 06:18:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-03-20 06:18:41,316 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-03-20 06:18:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:41,316 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-03-20 06:18:41,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:18:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-03-20 06:18:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 06:18:41,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:41,317 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:41,338 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 06:18:41,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:41,534 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-03-20 06:18:41,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:41,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645405794] [2022-03-20 06:18:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:41,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:41,542 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:41,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35806227] [2022-03-20 06:18:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:41,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:41,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:41,545 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 06:18:41,547 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 06:18:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:41,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 06:18:41,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 06:18:41,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 06:18:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645405794] [2022-03-20 06:18:41,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35806227] [2022-03-20 06:18:41,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35806227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:18:41,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:18:41,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 06:18:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320950409] [2022-03-20 06:18:41,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:18:41,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 06:18:41,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:41,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 06:18:41,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:18:41,789 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 06:18:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:41,889 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-03-20 06:18:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 06:18:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-03-20 06:18:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:41,893 INFO L225 Difference]: With dead ends: 224 [2022-03-20 06:18:41,893 INFO L226 Difference]: Without dead ends: 224 [2022-03-20 06:18:41,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-20 06:18:41,894 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 82 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:41,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 233 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:18:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-20 06:18:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2022-03-20 06:18:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 51 states have call successors, (51), 28 states have call predecessors, (51), 26 states have return successors, (46), 40 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 06:18:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2022-03-20 06:18:41,915 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 53 [2022-03-20 06:18:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:41,915 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2022-03-20 06:18:41,915 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 06:18:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2022-03-20 06:18:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 06:18:41,916 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:41,916 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:41,934 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 06:18:42,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:42,129 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:42,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:42,130 INFO L85 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2022-03-20 06:18:42,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:42,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923612304] [2022-03-20 06:18:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:42,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:42,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:42,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127361811] [2022-03-20 06:18:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:42,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:42,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:42,139 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 06:18:42,140 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 06:18:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:42,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 06:18:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 06:18:42,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 06:18:43,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:43,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923612304] [2022-03-20 06:18:43,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:43,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127361811] [2022-03-20 06:18:43,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127361811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:18:43,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:18:43,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 06:18:43,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065867605] [2022-03-20 06:18:43,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:18:43,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 06:18:43,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:43,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 06:18:43,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:18:43,460 INFO L87 Difference]: Start difference. First operand 217 states and 263 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 06:18:48,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:48,667 INFO L93 Difference]: Finished difference Result 310 states and 393 transitions. [2022-03-20 06:18:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 06:18:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2022-03-20 06:18:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:48,670 INFO L225 Difference]: With dead ends: 310 [2022-03-20 06:18:48,670 INFO L226 Difference]: Without dead ends: 303 [2022-03-20 06:18:48,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-20 06:18:48,671 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 52 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:48,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 294 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 06:18:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-20 06:18:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-03-20 06:18:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 191 states have internal predecessors, (228), 58 states have call successors, (58), 31 states have call predecessors, (58), 30 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 06:18:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 341 transitions. [2022-03-20 06:18:48,692 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 341 transitions. Word has length 62 [2022-03-20 06:18:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:48,692 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 341 transitions. [2022-03-20 06:18:48,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 06:18:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 341 transitions. [2022-03-20 06:18:48,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 06:18:48,694 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:48,694 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:48,715 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 06:18:48,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:48,896 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2022-03-20 06:18:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:48,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331302108] [2022-03-20 06:18:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:48,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:48,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:48,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679452298] [2022-03-20 06:18:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:48,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:48,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:48,905 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 06:18:48,906 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 06:18:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 06:18:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 06:18:49,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:18:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-03-20 06:18:49,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:49,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331302108] [2022-03-20 06:18:49,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:49,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679452298] [2022-03-20 06:18:49,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679452298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:18:49,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:18:49,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 06:18:49,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740256124] [2022-03-20 06:18:49,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:18:49,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 06:18:49,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:49,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 06:18:49,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-20 06:18:49,641 INFO L87 Difference]: Start difference. First operand 274 states and 341 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 06:18:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:50,007 INFO L93 Difference]: Finished difference Result 266 states and 313 transitions. [2022-03-20 06:18:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 06:18:50,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-03-20 06:18:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:50,009 INFO L225 Difference]: With dead ends: 266 [2022-03-20 06:18:50,009 INFO L226 Difference]: Without dead ends: 239 [2022-03-20 06:18:50,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-03-20 06:18:50,009 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 66 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:50,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 243 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 06:18:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-20 06:18:50,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-03-20 06:18:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 154 states have internal predecessors, (179), 45 states have call successors, (45), 29 states have call predecessors, (45), 27 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 06:18:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2022-03-20 06:18:50,019 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 73 [2022-03-20 06:18:50,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:50,019 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2022-03-20 06:18:50,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 06:18:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2022-03-20 06:18:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 06:18:50,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:50,020 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:50,039 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 06:18:50,227 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,SelfDestructingSolverStorable11 [2022-03-20 06:18:50,228 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:50,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1139963303, now seen corresponding path program 1 times [2022-03-20 06:18:50,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:50,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826864855] [2022-03-20 06:18:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:50,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:50,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834460127] [2022-03-20 06:18:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:50,241 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 06:18:50,243 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 06:18:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:18:50,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 06:18:50,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-20 06:18:50,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:18:50,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:18:50,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826864855] [2022-03-20 06:18:50,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:18:50,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834460127] [2022-03-20 06:18:50,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834460127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:18:50,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:18:50,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:18:50,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16017564] [2022-03-20 06:18:50,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:18:50,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:18:50,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:18:50,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:18:50,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:50,450 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 06:18:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:18:50,486 INFO L93 Difference]: Finished difference Result 222 states and 263 transitions. [2022-03-20 06:18:50,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:18:50,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-03-20 06:18:50,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:18:50,489 INFO L225 Difference]: With dead ends: 222 [2022-03-20 06:18:50,489 INFO L226 Difference]: Without dead ends: 222 [2022-03-20 06:18:50,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:18:50,489 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 25 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:18:50,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 96 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:18:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-20 06:18:50,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2022-03-20 06:18:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 06:18:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2022-03-20 06:18:50,499 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 82 [2022-03-20 06:18:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:18:50,500 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2022-03-20 06:18:50,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 06:18:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2022-03-20 06:18:50,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 06:18:50,503 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:18:50,504 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:18:50,541 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 06:18:50,723 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,SelfDestructingSolverStorable12 [2022-03-20 06:18:50,723 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:18:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:18:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 2 times [2022-03-20 06:18:50,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:18:50,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560550050] [2022-03-20 06:18:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:18:50,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:18:50,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:18:50,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185088791] [2022-03-20 06:18:50,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:18:50,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:18:50,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:18:50,747 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 06:18:50,761 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 06:18:50,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:18:50,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:18:50,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 06:18:50,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:18:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 06:18:51,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:19:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 06:19:11,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:19:11,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560550050] [2022-03-20 06:19:11,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:19:11,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185088791] [2022-03-20 06:19:11,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185088791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:19:11,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:19:11,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 06:19:11,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530333286] [2022-03-20 06:19:11,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:19:11,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 06:19:11,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:19:11,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 06:19:11,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 06:19:11,077 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-20 06:19:35,693 WARN L232 SmtUtils]: Spent 24.34s on a formula simplification. DAG size of input: 192 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 06:19:38,760 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 06:19:46,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:19:48,415 WARN L534 Checker$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 06:19:51,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:19:53,110 WARN L534 Checker$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 06:19:55,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:20:00,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:20:03,457 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 06:20:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:03,780 INFO L93 Difference]: Finished difference Result 293 states and 379 transitions. [2022-03-20 06:20:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 06:20:03,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 94 [2022-03-20 06:20:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:03,783 INFO L225 Difference]: With dead ends: 293 [2022-03-20 06:20:03,783 INFO L226 Difference]: Without dead ends: 275 [2022-03-20 06:20:03,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-03-20 06:20:03,784 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 125 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 193 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:03,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 659 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 527 Invalid, 6 Unknown, 0 Unchecked, 20.6s Time] [2022-03-20 06:20:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-20 06:20:03,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2022-03-20 06:20:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 177 states have internal predecessors, (211), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 06:20:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-03-20 06:20:03,795 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 94 [2022-03-20 06:20:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:03,795 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-03-20 06:20:03,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-20 06:20:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-03-20 06:20:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 06:20:03,796 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:03,797 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:03,826 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 06:20:03,997 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,SelfDestructingSolverStorable13 [2022-03-20 06:20:03,997 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash -105290329, now seen corresponding path program 1 times [2022-03-20 06:20:03,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:03,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670192066] [2022-03-20 06:20:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:03,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:04,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:04,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010116994] [2022-03-20 06:20:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:04,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:04,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:04,019 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 06:20:04,020 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 06:20:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:04,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 06:20:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 06:20:04,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 06:20:04,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:04,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670192066] [2022-03-20 06:20:04,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:04,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010116994] [2022-03-20 06:20:04,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010116994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:20:04,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:20:04,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 06:20:04,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304318914] [2022-03-20 06:20:04,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:04,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 06:20:04,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 06:20:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 06:20:04,496 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-20 06:20:04,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:04,743 INFO L93 Difference]: Finished difference Result 661 states and 888 transitions. [2022-03-20 06:20:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 06:20:04,743 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 100 [2022-03-20 06:20:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:04,746 INFO L225 Difference]: With dead ends: 661 [2022-03-20 06:20:04,746 INFO L226 Difference]: Without dead ends: 659 [2022-03-20 06:20:04,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 06:20:04,747 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 148 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:04,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 400 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:20:04,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-20 06:20:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 552. [2022-03-20 06:20:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 361 states have (on average 1.2825484764542936) internal successors, (463), 378 states have internal predecessors, (463), 136 states have call successors, (136), 56 states have call predecessors, (136), 54 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 06:20:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 730 transitions. [2022-03-20 06:20:04,775 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 730 transitions. Word has length 100 [2022-03-20 06:20:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:04,775 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 730 transitions. [2022-03-20 06:20:04,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-20 06:20:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 730 transitions. [2022-03-20 06:20:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 06:20:04,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:04,778 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:04,801 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 06:20:04,998 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,SelfDestructingSolverStorable14 [2022-03-20 06:20:04,998 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:04,999 INFO L85 PathProgramCache]: Analyzing trace with hash 331614142, now seen corresponding path program 1 times [2022-03-20 06:20:04,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:04,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958523990] [2022-03-20 06:20:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:05,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:05,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375435748] [2022-03-20 06:20:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:05,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:05,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:05,010 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 06:20:05,011 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 06:20:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 06:20:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 06:20:05,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 06:20:05,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:05,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958523990] [2022-03-20 06:20:05,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:05,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375435748] [2022-03-20 06:20:05,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375435748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:20:05,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:20:05,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 06:20:05,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589915597] [2022-03-20 06:20:05,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:05,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 06:20:05,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:05,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 06:20:05,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 06:20:05,543 INFO L87 Difference]: Start difference. First operand 552 states and 730 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-03-20 06:20:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:05,952 INFO L93 Difference]: Finished difference Result 1124 states and 1476 transitions. [2022-03-20 06:20:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 06:20:05,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) Word has length 108 [2022-03-20 06:20:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:05,964 INFO L225 Difference]: With dead ends: 1124 [2022-03-20 06:20:05,964 INFO L226 Difference]: Without dead ends: 1122 [2022-03-20 06:20:05,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2022-03-20 06:20:05,965 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 328 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:05,965 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 500 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 06:20:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-03-20 06:20:05,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1097. [2022-03-20 06:20:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.2455418381344308) internal successors, (908), 758 states have internal predecessors, (908), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-03-20 06:20:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1457 transitions. [2022-03-20 06:20:05,994 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1457 transitions. Word has length 108 [2022-03-20 06:20:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:05,995 INFO L478 AbstractCegarLoop]: Abstraction has 1097 states and 1457 transitions. [2022-03-20 06:20:05,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-03-20 06:20:05,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1457 transitions. [2022-03-20 06:20:05,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 06:20:05,996 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:05,997 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 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] [2022-03-20 06:20:06,031 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 06:20:06,212 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,SelfDestructingSolverStorable15 [2022-03-20 06:20:06,213 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1288142005, now seen corresponding path program 1 times [2022-03-20 06:20:06,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:06,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223012237] [2022-03-20 06:20:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:06,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:06,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:06,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667600978] [2022-03-20 06:20:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:06,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:06,220 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 06:20:06,222 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 06:20:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:20:06,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 06:20:06,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 06:20:06,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 06:20:07,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:07,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223012237] [2022-03-20 06:20:07,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:07,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667600978] [2022-03-20 06:20:07,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667600978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:20:07,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:20:07,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 06:20:07,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267813566] [2022-03-20 06:20:07,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:07,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 06:20:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 06:20:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:20:07,356 INFO L87 Difference]: Start difference. First operand 1097 states and 1457 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-20 06:20:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:07,652 INFO L93 Difference]: Finished difference Result 1101 states and 1461 transitions. [2022-03-20 06:20:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:20:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 110 [2022-03-20 06:20:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:07,658 INFO L225 Difference]: With dead ends: 1101 [2022-03-20 06:20:07,658 INFO L226 Difference]: Without dead ends: 1097 [2022-03-20 06:20:07,659 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:20:07,659 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:07,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 350 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 06:20:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-03-20 06:20:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2022-03-20 06:20:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.242798353909465) internal successors, (906), 758 states have internal predecessors, (906), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-03-20 06:20:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1455 transitions. [2022-03-20 06:20:07,688 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1455 transitions. Word has length 110 [2022-03-20 06:20:07,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:07,688 INFO L478 AbstractCegarLoop]: Abstraction has 1097 states and 1455 transitions. [2022-03-20 06:20:07,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-20 06:20:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1455 transitions. [2022-03-20 06:20:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 06:20:07,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:07,690 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:07,717 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 06:20:07,903 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,SelfDestructingSolverStorable16 [2022-03-20 06:20:07,904 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash 848408867, now seen corresponding path program 2 times [2022-03-20 06:20:07,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:07,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799137319] [2022-03-20 06:20:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:07,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:07,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:07,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965306652] [2022-03-20 06:20:07,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:20:07,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:07,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:07,913 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 06:20:07,915 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 06:20:07,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:20:07,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:20:07,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 06:20:07,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-03-20 06:20:08,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 06:20:08,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799137319] [2022-03-20 06:20:08,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965306652] [2022-03-20 06:20:08,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965306652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:20:08,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:20:08,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-20 06:20:08,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608265764] [2022-03-20 06:20:08,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:08,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 06:20:08,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:08,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 06:20:08,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 06:20:08,520 INFO L87 Difference]: Start difference. First operand 1097 states and 1455 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-03-20 06:20:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:08,588 INFO L93 Difference]: Finished difference Result 947 states and 1203 transitions. [2022-03-20 06:20:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:20:08,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 124 [2022-03-20 06:20:08,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:08,592 INFO L225 Difference]: With dead ends: 947 [2022-03-20 06:20:08,592 INFO L226 Difference]: Without dead ends: 907 [2022-03-20 06:20:08,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 06:20:08,593 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 3 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:08,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 262 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:20:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-20 06:20:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 905. [2022-03-20 06:20:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 598 states have (on average 1.2040133779264215) internal successors, (720), 627 states have internal predecessors, (720), 221 states have call successors, (221), 87 states have call predecessors, (221), 85 states have return successors, (212), 190 states have call predecessors, (212), 212 states have call successors, (212) [2022-03-20 06:20:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1153 transitions. [2022-03-20 06:20:08,613 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1153 transitions. Word has length 124 [2022-03-20 06:20:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:08,615 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1153 transitions. [2022-03-20 06:20:08,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-03-20 06:20:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1153 transitions. [2022-03-20 06:20:08,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 06:20:08,617 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:08,617 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:08,653 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 06:20:08,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:08,854 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash 722879610, now seen corresponding path program 3 times [2022-03-20 06:20:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:08,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971547450] [2022-03-20 06:20:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:08,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:08,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:08,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631262237] [2022-03-20 06:20:08,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:20:08,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:08,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:08,892 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 06:20:08,893 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 06:20:08,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 06:20:08,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:20:08,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 06:20:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:09,256 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:20:09,347 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:20:09,469 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:20:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-03-20 06:20:09,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:24,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:24,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971547450] [2022-03-20 06:20:24,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:24,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631262237] [2022-03-20 06:20:24,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631262237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 06:20:24,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:20:24,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 06:20:24,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666904717] [2022-03-20 06:20:24,872 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:24,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 06:20:24,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:24,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 06:20:24,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 06:20:24,873 INFO L87 Difference]: Start difference. First operand 905 states and 1153 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 06:20:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:24,966 INFO L93 Difference]: Finished difference Result 933 states and 1174 transitions. [2022-03-20 06:20:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 06:20:24,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 126 [2022-03-20 06:20:24,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:24,971 INFO L225 Difference]: With dead ends: 933 [2022-03-20 06:20:24,972 INFO L226 Difference]: Without dead ends: 921 [2022-03-20 06:20:24,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-20 06:20:24,973 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:24,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 115 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:20:24,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-03-20 06:20:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 695. [2022-03-20 06:20:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 468 states have (on average 1.1752136752136753) internal successors, (550), 470 states have internal predecessors, (550), 153 states have call successors, (153), 75 states have call predecessors, (153), 73 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2022-03-20 06:20:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 853 transitions. [2022-03-20 06:20:24,998 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 853 transitions. Word has length 126 [2022-03-20 06:20:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:24,998 INFO L478 AbstractCegarLoop]: Abstraction has 695 states and 853 transitions. [2022-03-20 06:20:24,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 06:20:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 853 transitions. [2022-03-20 06:20:25,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 06:20:25,000 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:25,000 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:25,038 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 06:20:25,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:25,216 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:25,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:25,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1722143882, now seen corresponding path program 3 times [2022-03-20 06:20:25,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:25,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952870415] [2022-03-20 06:20:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:25,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:25,228 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:25,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940182027] [2022-03-20 06:20:25,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:20:25,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:25,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:25,244 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 06:20:25,246 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 06:20:25,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 06:20:25,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:20:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 06:20:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-03-20 06:20:25,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-03-20 06:20:25,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952870415] [2022-03-20 06:20:25,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940182027] [2022-03-20 06:20:25,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940182027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:20:25,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:20:25,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 06:20:25,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402565365] [2022-03-20 06:20:25,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:25,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 06:20:25,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 06:20:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-20 06:20:25,805 INFO L87 Difference]: Start difference. First operand 695 states and 853 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 06:20:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:25,920 INFO L93 Difference]: Finished difference Result 769 states and 909 transitions. [2022-03-20 06:20:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 06:20:25,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 128 [2022-03-20 06:20:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:25,923 INFO L225 Difference]: With dead ends: 769 [2022-03-20 06:20:25,924 INFO L226 Difference]: Without dead ends: 755 [2022-03-20 06:20:25,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 06:20:25,925 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:25,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 152 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:20:25,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-20 06:20:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 539. [2022-03-20 06:20:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 362 states have (on average 1.1049723756906078) internal successors, (400), 373 states have internal predecessors, (400), 103 states have call successors, (103), 74 states have call predecessors, (103), 73 states have return successors, (101), 91 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-20 06:20:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 604 transitions. [2022-03-20 06:20:25,945 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 604 transitions. Word has length 128 [2022-03-20 06:20:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:25,946 INFO L478 AbstractCegarLoop]: Abstraction has 539 states and 604 transitions. [2022-03-20 06:20:25,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 06:20:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 604 transitions. [2022-03-20 06:20:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-03-20 06:20:25,949 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:25,949 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:25,995 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 06:20:26,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:26,175 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:26,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:26,176 INFO L85 PathProgramCache]: Analyzing trace with hash -206704767, now seen corresponding path program 2 times [2022-03-20 06:20:26,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:26,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140476601] [2022-03-20 06:20:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:26,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:26,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:26,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923995175] [2022-03-20 06:20:26,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:20:26,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:26,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:26,209 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 06:20:26,283 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 06:20:26,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:20:26,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:20:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 06:20:26,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 06:20:26,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-20 06:20:27,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:27,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140476601] [2022-03-20 06:20:27,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:27,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923995175] [2022-03-20 06:20:27,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923995175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:20:27,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:20:27,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-20 06:20:27,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306136228] [2022-03-20 06:20:27,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:27,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 06:20:27,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:27,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 06:20:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 06:20:27,408 INFO L87 Difference]: Start difference. First operand 539 states and 604 transitions. Second operand has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) [2022-03-20 06:20:28,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:28,036 INFO L93 Difference]: Finished difference Result 816 states and 923 transitions. [2022-03-20 06:20:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 06:20:28,037 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) Word has length 224 [2022-03-20 06:20:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:28,040 INFO L225 Difference]: With dead ends: 816 [2022-03-20 06:20:28,040 INFO L226 Difference]: Without dead ends: 816 [2022-03-20 06:20:28,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=965, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 06:20:28,041 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 349 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:28,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 486 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 06:20:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-03-20 06:20:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 815. [2022-03-20 06:20:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 548 states have (on average 1.1131386861313868) internal successors, (610), 565 states have internal predecessors, (610), 157 states have call successors, (157), 110 states have call predecessors, (157), 109 states have return successors, (155), 139 states have call predecessors, (155), 155 states have call successors, (155) [2022-03-20 06:20:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 922 transitions. [2022-03-20 06:20:28,060 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 922 transitions. Word has length 224 [2022-03-20 06:20:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:28,060 INFO L478 AbstractCegarLoop]: Abstraction has 815 states and 922 transitions. [2022-03-20 06:20:28,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) [2022-03-20 06:20:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 922 transitions. [2022-03-20 06:20:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-03-20 06:20:28,065 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:28,065 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 44, 17, 16, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:28,110 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 06:20:28,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:28,280 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:28,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:28,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1664620565, now seen corresponding path program 3 times [2022-03-20 06:20:28,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:28,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435228072] [2022-03-20 06:20:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:28,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:28,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:28,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390172900] [2022-03-20 06:20:28,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:20:28,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:28,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:28,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:20:28,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 06:20:28,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-20 06:20:28,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:20:28,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 06:20:28,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 2247 proven. 69 refuted. 0 times theorem prover too weak. 2344 trivial. 0 not checked. [2022-03-20 06:20:29,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 491 proven. 85 refuted. 0 times theorem prover too weak. 4084 trivial. 0 not checked. [2022-03-20 06:20:31,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:31,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435228072] [2022-03-20 06:20:31,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:31,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390172900] [2022-03-20 06:20:31,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390172900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:20:31,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:20:31,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2022-03-20 06:20:31,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221526945] [2022-03-20 06:20:31,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:31,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 06:20:31,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:31,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 06:20:31,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:20:31,926 INFO L87 Difference]: Start difference. First operand 815 states and 922 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2022-03-20 06:20:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:32,294 INFO L93 Difference]: Finished difference Result 923 states and 1075 transitions. [2022-03-20 06:20:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 06:20:32,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) Word has length 308 [2022-03-20 06:20:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:32,298 INFO L225 Difference]: With dead ends: 923 [2022-03-20 06:20:32,298 INFO L226 Difference]: Without dead ends: 731 [2022-03-20 06:20:32,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 603 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-20 06:20:32,298 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 19 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:32,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 376 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:20:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-20 06:20:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2022-03-20 06:20:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 491 states have (on average 1.1079429735234216) internal successors, (544), 505 states have internal predecessors, (544), 139 states have call successors, (139), 101 states have call predecessors, (139), 100 states have return successors, (137), 124 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-20 06:20:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 820 transitions. [2022-03-20 06:20:32,312 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 820 transitions. Word has length 308 [2022-03-20 06:20:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:32,313 INFO L478 AbstractCegarLoop]: Abstraction has 731 states and 820 transitions. [2022-03-20 06:20:32,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2022-03-20 06:20:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 820 transitions. [2022-03-20 06:20:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-03-20 06:20:32,316 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:32,316 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:32,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 06:20:32,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:32,543 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:32,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1611585699, now seen corresponding path program 2 times [2022-03-20 06:20:32,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:32,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162181907] [2022-03-20 06:20:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:32,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:32,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244672215] [2022-03-20 06:20:32,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:20:32,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:32,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:32,555 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:20:32,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 06:20:32,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:20:32,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:20:32,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 06:20:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 2220 proven. 1910 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2022-03-20 06:20:33,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 96 proven. 290 refuted. 0 times theorem prover too weak. 4746 trivial. 0 not checked. [2022-03-20 06:20:33,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:33,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162181907] [2022-03-20 06:20:33,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:33,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244672215] [2022-03-20 06:20:33,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244672215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:20:33,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:20:33,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 06:20:33,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177924923] [2022-03-20 06:20:33,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:33,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 06:20:33,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:33,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 06:20:33,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 06:20:33,671 INFO L87 Difference]: Start difference. First operand 731 states and 820 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) [2022-03-20 06:20:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:34,206 INFO L93 Difference]: Finished difference Result 733 states and 813 transitions. [2022-03-20 06:20:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 06:20:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) Word has length 320 [2022-03-20 06:20:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:34,209 INFO L225 Difference]: With dead ends: 733 [2022-03-20 06:20:34,210 INFO L226 Difference]: Without dead ends: 733 [2022-03-20 06:20:34,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 616 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 06:20:34,211 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 261 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:34,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 446 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 06:20:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-20 06:20:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 733. [2022-03-20 06:20:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 493 states have (on average 1.0892494929006085) internal successors, (537), 507 states have internal predecessors, (537), 139 states have call successors, (139), 101 states have call predecessors, (139), 100 states have return successors, (137), 124 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-20 06:20:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 813 transitions. [2022-03-20 06:20:34,238 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 813 transitions. Word has length 320 [2022-03-20 06:20:34,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:34,239 INFO L478 AbstractCegarLoop]: Abstraction has 733 states and 813 transitions. [2022-03-20 06:20:34,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) [2022-03-20 06:20:34,239 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 813 transitions. [2022-03-20 06:20:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-03-20 06:20:34,242 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:34,242 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 47, 14, 13, 13, 13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:34,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 06:20:34,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:34,462 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:34,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1950046478, now seen corresponding path program 4 times [2022-03-20 06:20:34,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:34,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312268260] [2022-03-20 06:20:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:34,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:34,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:34,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146887640] [2022-03-20 06:20:34,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 06:20:34,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:34,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:34,482 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:20:34,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 06:20:56,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 06:20:56,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:20:56,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 06:20:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:20:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 2016 proven. 246 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2022-03-20 06:20:57,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:20:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 389 proven. 217 refuted. 0 times theorem prover too weak. 4432 trivial. 0 not checked. [2022-03-20 06:20:59,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:20:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312268260] [2022-03-20 06:20:59,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:20:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146887640] [2022-03-20 06:20:59,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146887640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:20:59,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:20:59,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-03-20 06:20:59,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551083435] [2022-03-20 06:20:59,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:20:59,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 06:20:59,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:20:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 06:20:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 06:20:59,372 INFO L87 Difference]: Start difference. First operand 733 states and 813 transitions. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) [2022-03-20 06:20:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:20:59,615 INFO L93 Difference]: Finished difference Result 793 states and 900 transitions. [2022-03-20 06:20:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 06:20:59,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) Word has length 320 [2022-03-20 06:20:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:20:59,618 INFO L225 Difference]: With dead ends: 793 [2022-03-20 06:20:59,618 INFO L226 Difference]: Without dead ends: 705 [2022-03-20 06:20:59,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 623 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 06:20:59,618 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 12 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:20:59,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 873 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:20:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-03-20 06:20:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2022-03-20 06:20:59,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 474 states have (on average 1.0864978902953586) internal successors, (515), 487 states have internal predecessors, (515), 133 states have call successors, (133), 98 states have call predecessors, (133), 97 states have return successors, (131), 119 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 06:20:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 779 transitions. [2022-03-20 06:20:59,629 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 779 transitions. Word has length 320 [2022-03-20 06:20:59,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:20:59,629 INFO L478 AbstractCegarLoop]: Abstraction has 705 states and 779 transitions. [2022-03-20 06:20:59,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) [2022-03-20 06:20:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 779 transitions. [2022-03-20 06:20:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-03-20 06:20:59,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:20:59,633 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:20:59,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-20 06:20:59,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-20 06:20:59,852 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:20:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:20:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash 179823329, now seen corresponding path program 5 times [2022-03-20 06:20:59,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:20:59,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915540477] [2022-03-20 06:20:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:20:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:20:59,871 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:20:59,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825701274] [2022-03-20 06:20:59,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 06:20:59,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:20:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:20:59,876 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:20:59,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 06:21:18,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-20 06:21:18,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:21:18,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 06:21:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:21:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 1571 proven. 329 refuted. 0 times theorem prover too weak. 3296 trivial. 0 not checked. [2022-03-20 06:21:19,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:21:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 397 proven. 239 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2022-03-20 06:21:24,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:21:24,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915540477] [2022-03-20 06:21:24,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:21:24,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825701274] [2022-03-20 06:21:24,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825701274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:21:24,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:21:24,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-20 06:21:24,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156737639] [2022-03-20 06:21:24,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:21:24,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 06:21:24,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:21:24,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 06:21:24,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-20 06:21:24,920 INFO L87 Difference]: Start difference. First operand 705 states and 779 transitions. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) [2022-03-20 06:21:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:21:25,168 INFO L93 Difference]: Finished difference Result 777 states and 884 transitions. [2022-03-20 06:21:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 06:21:25,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) Word has length 324 [2022-03-20 06:21:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:21:25,187 INFO L225 Difference]: With dead ends: 777 [2022-03-20 06:21:25,187 INFO L226 Difference]: Without dead ends: 677 [2022-03-20 06:21:25,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 626 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-20 06:21:25,188 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 25 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 06:21:25,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 527 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 06:21:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-03-20 06:21:25,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2022-03-20 06:21:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 455 states have (on average 1.0835164835164834) internal successors, (493), 467 states have internal predecessors, (493), 127 states have call successors, (127), 95 states have call predecessors, (127), 94 states have return successors, (125), 114 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 06:21:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2022-03-20 06:21:25,200 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 324 [2022-03-20 06:21:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:21:25,201 INFO L478 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2022-03-20 06:21:25,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) [2022-03-20 06:21:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2022-03-20 06:21:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-03-20 06:21:25,203 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:21:25,203 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 49, 12, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:21:25,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 06:21:25,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 06:21:25,416 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:21:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:21:25,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1085750924, now seen corresponding path program 6 times [2022-03-20 06:21:25,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:21:25,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194093081] [2022-03-20 06:21:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:21:25,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:21:25,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:21:25,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476608945] [2022-03-20 06:21:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 06:21:25,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:21:25,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:21:25,427 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:21:25,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 06:21:25,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 06:21:25,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:21:25,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-20 06:21:25,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:21:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 1317 proven. 541 refuted. 0 times theorem prover too weak. 3512 trivial. 0 not checked. [2022-03-20 06:21:27,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:21:53,783 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:22:29,661 WARN L232 SmtUtils]: Spent 13.67s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 06:23:16,214 WARN L232 SmtUtils]: Spent 20.16s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)