/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 15:11:02,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 15:11:02,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 15:11:02,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 15:11:02,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 15:11:02,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 15:11:02,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 15:11:02,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 15:11:02,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 15:11:02,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 15:11:02,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 15:11:02,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 15:11:02,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 15:11:02,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 15:11:02,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 15:11:02,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 15:11:02,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 15:11:02,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 15:11:02,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 15:11:02,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 15:11:02,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 15:11:02,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 15:11:02,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 15:11:02,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 15:11:02,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 15:11:02,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 15:11:02,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 15:11:02,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 15:11:02,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 15:11:02,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 15:11:02,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 15:11:02,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 15:11:02,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 15:11:02,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 15:11:02,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 15:11:02,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 15:11:02,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 15:11:02,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 15:11:02,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 15:11:02,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 15:11:02,656 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 15:11:02,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 15:11:02,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 15:11:02,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 15:11:02,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 15:11:02,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 15:11:02,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 15:11:02,660 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 15:11:02,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 15:11:02,660 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 15:11:02,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 15:11:02,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 15:11:02,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 15:11:02,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 15:11:02,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 15:11:02,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 15:11:02,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 15:11:02,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 15:11:02,662 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 15:11:02,662 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 15:11:02,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 15:11:02,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 15:11:02,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 15:11:02,880 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 15:11:02,881 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 15:11:02,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound20.c [2022-01-31 15:11:02,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ee6cc0c/8a184b134fa8495092f9162358e7d490/FLAG7f16dbd2d [2022-01-31 15:11:03,308 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 15:11:03,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound20.c [2022-01-31 15:11:03,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ee6cc0c/8a184b134fa8495092f9162358e7d490/FLAG7f16dbd2d [2022-01-31 15:11:03,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ee6cc0c/8a184b134fa8495092f9162358e7d490 [2022-01-31 15:11:03,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 15:11:03,326 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 15:11:03,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 15:11:03,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 15:11:03,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 15:11:03,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb5e606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03, skipping insertion in model container [2022-01-31 15:11:03,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 15:11:03,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 15:11:03,449 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_valuebound20.c[526,539] [2022-01-31 15:11:03,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 15:11:03,472 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 15:11:03,481 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_valuebound20.c[526,539] [2022-01-31 15:11:03,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 15:11:03,493 INFO L208 MainTranslator]: Completed translation [2022-01-31 15:11:03,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03 WrapperNode [2022-01-31 15:11:03,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 15:11:03,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 15:11:03,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 15:11:03,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 15:11:03,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 15:11:03,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 15:11:03,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 15:11:03,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 15:11:03,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 15:11:03,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:03,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 15:11:03,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 15:11:03,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 15:11:03,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 15:11:03,582 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 15:11:03,582 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 15:11:03,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 15:11:03,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 15:11:03,583 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 15:11:03,583 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 15:11:03,583 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 15:11:03,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 15:11:03,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 15:11:03,584 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 15:11:03,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 15:11:03,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 15:11:03,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 15:11:03,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 15:11:03,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 15:11:03,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 15:11:03,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 15:11:03,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 15:11:03,631 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 15:11:03,632 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 15:11:03,749 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 15:11:03,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 15:11:03,754 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 15:11:03,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:11:03 BoogieIcfgContainer [2022-01-31 15:11:03,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 15:11:03,756 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 15:11:03,756 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 15:11:03,757 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 15:11:03,759 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:11:03" (1/1) ... [2022-01-31 15:11:03,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 03:11:03 BasicIcfg [2022-01-31 15:11:03,789 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 15:11:03,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 15:11:03,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 15:11:03,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 15:11:03,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 03:11:03" (1/4) ... [2022-01-31 15:11:03,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4181b192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:11:03, skipping insertion in model container [2022-01-31 15:11:03,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:11:03" (2/4) ... [2022-01-31 15:11:03,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4181b192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:11:03, skipping insertion in model container [2022-01-31 15:11:03,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:11:03" (3/4) ... [2022-01-31 15:11:03,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4181b192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 03:11:03, skipping insertion in model container [2022-01-31 15:11:03,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 03:11:03" (4/4) ... [2022-01-31 15:11:03,794 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound20.cJordan [2022-01-31 15:11:03,797 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 15:11:03,798 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 15:11:03,865 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 15:11:03,871 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 15:11:03,871 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 15:11:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 15:11:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 15:11:03,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:03,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:11:03,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:03,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2022-01-31 15:11:03,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:03,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665044252] [2022-01-31 15:11:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:03,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:11:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 15:11:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:11:04,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:04,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665044252] [2022-01-31 15:11:04,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665044252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:11:04,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:11:04,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 15:11:04,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782771757] [2022-01-31 15:11:04,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:11:04,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 15:11:04,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:04,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 15:11:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 15:11:04,119 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 15:11:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:04,191 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-01-31 15:11:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 15:11:04,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-31 15:11:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:04,203 INFO L225 Difference]: With dead ends: 35 [2022-01-31 15:11:04,204 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 15:11:04,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 15:11:04,209 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:04,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:11:04,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 15:11:04,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 15:11:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 15:11:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-01-31 15:11:04,242 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-01-31 15:11:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:04,243 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-01-31 15:11:04,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 15:11:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-01-31 15:11:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 15:11:04,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:04,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:11:04,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 15:11:04,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:04,246 INFO L85 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2022-01-31 15:11:04,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:04,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683161663] [2022-01-31 15:11:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:04,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:11:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 15:11:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:11:04,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:04,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683161663] [2022-01-31 15:11:04,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683161663] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:11:04,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:11:04,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 15:11:04,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362991409] [2022-01-31 15:11:04,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:11:04,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 15:11:04,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 15:11:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:11:04,397 INFO L87 Difference]: Start difference. First operand 30 states and 38 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), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 15:11:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:04,581 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-01-31 15:11:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 15:11:04,584 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), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-31 15:11:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:04,585 INFO L225 Difference]: With dead ends: 41 [2022-01-31 15:11:04,585 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 15:11:04,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:11:04,586 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:04,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:11:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 15:11:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-01-31 15:11:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 15:11:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-31 15:11:04,597 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-01-31 15:11:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:04,597 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-31 15:11:04,598 INFO L471 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), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 15:11:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-31 15:11:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 15:11:04,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:04,598 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:11:04,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 15:11:04,599 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2022-01-31 15:11:04,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:04,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660553692] [2022-01-31 15:11:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:04,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:11:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 15:11:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 15:11:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 15:11:04,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:04,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660553692] [2022-01-31 15:11:04,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660553692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:11:04,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:11:04,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 15:11:04,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492767840] [2022-01-31 15:11:04,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:11:04,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 15:11:04,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:04,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 15:11:04,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:11:04,701 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 15:11:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:04,829 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-01-31 15:11:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 15:11:04,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 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 [2022-01-31 15:11:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:04,831 INFO L225 Difference]: With dead ends: 45 [2022-01-31 15:11:04,831 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 15:11:04,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:11:04,832 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:04,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:11:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 15:11:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-01-31 15:11:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 15:11:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-01-31 15:11:04,837 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-01-31 15:11:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:04,837 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-01-31 15:11:04,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 15:11:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-01-31 15:11:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 15:11:04,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:04,838 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:11:04,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 15:11:04,838 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2022-01-31 15:11:04,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:04,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688979425] [2022-01-31 15:11:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:04,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:04,853 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:11:04,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423741556] [2022-01-31 15:11:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:04,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:04,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:04,863 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:11:04,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 15:11:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 15:11:04,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:11:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 15:11:05,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:11:05,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:05,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688979425] [2022-01-31 15:11:05,034 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:11:05,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423741556] [2022-01-31 15:11:05,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423741556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:11:05,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:11:05,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 15:11:05,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587195165] [2022-01-31 15:11:05,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:11:05,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:11:05,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:05,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:11:05,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:11:05,040 INFO L87 Difference]: Start difference. First operand 38 states and 44 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) [2022-01-31 15:11:05,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:05,087 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-01-31 15:11:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:11:05,089 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 27 [2022-01-31 15:11:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:05,090 INFO L225 Difference]: With dead ends: 53 [2022-01-31 15:11:05,090 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 15:11:05,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:11:05,091 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:05,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:11:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 15:11:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-31 15:11:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 15:11:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-01-31 15:11:05,096 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-01-31 15:11:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:05,097 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-01-31 15:11:05,097 INFO L471 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) [2022-01-31 15:11:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-01-31 15:11:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 15:11:05,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:05,098 INFO L514 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, 1, 1, 1, 1] [2022-01-31 15:11:05,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 15:11:05,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:05,308 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2022-01-31 15:11:05,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:05,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98023994] [2022-01-31 15:11:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:05,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:05,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:11:05,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145484165] [2022-01-31 15:11:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:05,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:05,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:05,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:11:05,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 15:11:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:05,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 15:11:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:11:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:11:05,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:11:05,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:05,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98023994] [2022-01-31 15:11:05,439 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:11:05,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145484165] [2022-01-31 15:11:05,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145484165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:11:05,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:11:05,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 15:11:05,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305831251] [2022-01-31 15:11:05,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:11:05,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:11:05,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:05,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:11:05,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:11:05,440 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:11:05,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:05,476 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-01-31 15:11:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:11:05,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-01-31 15:11:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:05,477 INFO L225 Difference]: With dead ends: 63 [2022-01-31 15:11:05,477 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 15:11:05,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:11:05,478 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:05,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:11:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 15:11:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-01-31 15:11:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 15:11:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-01-31 15:11:05,487 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-01-31 15:11:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:05,487 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-01-31 15:11:05,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:11:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-01-31 15:11:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 15:11:05,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:05,488 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:11:05,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 15:11:05,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:05,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2022-01-31 15:11:05,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:05,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344776722] [2022-01-31 15:11:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:05,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:05,713 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:11:05,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884588936] [2022-01-31 15:11:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:05,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:05,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:05,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:11:05,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 15:11:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:05,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 15:11:05,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:11:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 15:11:05,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:11:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-31 15:11:06,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:06,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344776722] [2022-01-31 15:11:06,022 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:11:06,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884588936] [2022-01-31 15:11:06,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884588936] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 15:11:06,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 15:11:06,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-01-31 15:11:06,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847134164] [2022-01-31 15:11:06,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:11:06,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:11:06,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:11:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 15:11:06,024 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:11:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:06,061 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2022-01-31 15:11:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:11:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-01-31 15:11:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:06,064 INFO L225 Difference]: With dead ends: 67 [2022-01-31 15:11:06,064 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 15:11:06,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 15:11:06,064 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:06,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:11:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 15:11:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-01-31 15:11:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 15:11:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-01-31 15:11:06,070 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-01-31 15:11:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:06,070 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-01-31 15:11:06,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:11:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-01-31 15:11:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 15:11:06,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:06,072 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:11:06,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 15:11:06,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:06,288 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:06,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:06,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2022-01-31 15:11:06,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:06,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145106915] [2022-01-31 15:11:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:06,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:06,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:11:06,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228641369] [2022-01-31 15:11:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:06,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:06,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:06,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:11:06,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 15:11:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:06,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 15:11:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:11:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 15:11:06,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:11:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 15:11:07,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:07,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145106915] [2022-01-31 15:11:07,431 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:11:07,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228641369] [2022-01-31 15:11:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228641369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:11:07,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:11:07,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-31 15:11:07,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958243337] [2022-01-31 15:11:07,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:11:07,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 15:11:07,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 15:11:07,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:11:07,439 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 15:11:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:09,160 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2022-01-31 15:11:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 15:11:09,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 64 [2022-01-31 15:11:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:09,162 INFO L225 Difference]: With dead ends: 131 [2022-01-31 15:11:09,162 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 15:11:09,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-31 15:11:09,163 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:09,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 299 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 15:11:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 15:11:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-01-31 15:11:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 15:11:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-01-31 15:11:09,174 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 64 [2022-01-31 15:11:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:09,175 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-01-31 15:11:09,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 15:11:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-01-31 15:11:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 15:11:09,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:09,176 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1, 1, 1, 1, 1] [2022-01-31 15:11:09,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 15:11:09,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:09,391 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2022-01-31 15:11:09,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:09,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925012461] [2022-01-31 15:11:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:09,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:09,399 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:11:09,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796821183] [2022-01-31 15:11:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:09,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:09,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:09,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:11:09,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 15:11:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:09,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 15:11:09,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:11:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 15:11:09,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:11:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-01-31 15:11:10,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:10,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925012461] [2022-01-31 15:11:10,009 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:11:10,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796821183] [2022-01-31 15:11:10,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796821183] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:11:10,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:11:10,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-01-31 15:11:10,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026804443] [2022-01-31 15:11:10,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:11:10,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 15:11:10,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:10,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 15:11:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-31 15:11:10,011 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-31 15:11:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:10,257 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2022-01-31 15:11:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 15:11:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 75 [2022-01-31 15:11:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:10,259 INFO L225 Difference]: With dead ends: 134 [2022-01-31 15:11:10,259 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 15:11:10,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-31 15:11:10,259 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:10,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 181 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 15:11:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 15:11:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2022-01-31 15:11:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 64 states have internal predecessors, (71), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 15:11:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-01-31 15:11:10,266 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 75 [2022-01-31 15:11:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:10,266 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-01-31 15:11:10,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-31 15:11:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-01-31 15:11:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 15:11:10,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:10,267 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1, 1] [2022-01-31 15:11:10,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 15:11:10,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:10,468 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:10,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1480109990, now seen corresponding path program 1 times [2022-01-31 15:11:10,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:10,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45239568] [2022-01-31 15:11:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:10,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:10,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:11:10,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283798379] [2022-01-31 15:11:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:10,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:10,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:10,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:11:10,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 15:11:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 15:11:10,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:11:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-01-31 15:11:10,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:11:10,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:10,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45239568] [2022-01-31 15:11:10,698 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:11:10,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283798379] [2022-01-31 15:11:10,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283798379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:11:10,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:11:10,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 15:11:10,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223632002] [2022-01-31 15:11:10,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:11:10,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:11:10,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:11:10,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:11:10,701 INFO L87 Difference]: Start difference. First operand 101 states and 121 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-31 15:11:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:10,732 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2022-01-31 15:11:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:11:10,732 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2022-01-31 15:11:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:10,735 INFO L225 Difference]: With dead ends: 103 [2022-01-31 15:11:10,735 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 15:11:10,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:11:10,738 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:10,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:11:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 15:11:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-01-31 15:11:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 15:11:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2022-01-31 15:11:10,755 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 84 [2022-01-31 15:11:10,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:10,755 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2022-01-31 15:11:10,755 INFO L471 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-31 15:11:10,755 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2022-01-31 15:11:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 15:11:10,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:10,756 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:11:10,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 15:11:10,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:10,975 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:10,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:10,976 INFO L85 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 2 times [2022-01-31 15:11:10,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:10,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727070567] [2022-01-31 15:11:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:10,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:10,983 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:11:10,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620470908] [2022-01-31 15:11:10,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 15:11:10,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:10,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:10,984 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:11:11,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 15:11:11,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 15:11:11,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:11:11,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 15:11:11,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:11:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-01-31 15:11:11,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:11:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-01-31 15:11:30,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727070567] [2022-01-31 15:11:30,559 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:11:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620470908] [2022-01-31 15:11:30,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620470908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:11:30,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:11:30,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-31 15:11:30,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456208141] [2022-01-31 15:11:30,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:11:30,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 15:11:30,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:30,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 15:11:30,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2022-01-31 15:11:30,560 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-01-31 15:11:38,146 WARN L228 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 192 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 15:11:48,008 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 [] [2022-01-31 15:11:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:48,059 INFO L93 Difference]: Finished difference Result 193 states and 258 transitions. [2022-01-31 15:11:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 15:11:48,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 94 [2022-01-31 15:11:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:48,061 INFO L225 Difference]: With dead ends: 193 [2022-01-31 15:11:48,061 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 15:11:48,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-01-31 15:11:48,063 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 90 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 189 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:48,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 599 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 527 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-01-31 15:11:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 15:11:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 166. [2022-01-31 15:11:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 100 states have (on average 1.21) internal successors, (121), 104 states have internal predecessors, (121), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 15:11:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 217 transitions. [2022-01-31 15:11:48,073 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 217 transitions. Word has length 94 [2022-01-31 15:11:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:48,074 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 217 transitions. [2022-01-31 15:11:48,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-01-31 15:11:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 217 transitions. [2022-01-31 15:11:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 15:11:48,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:48,076 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 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, 1, 1, 1, 1, 1, 1] [2022-01-31 15:11:48,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 15:11:48,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:48,276 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash 411415430, now seen corresponding path program 1 times [2022-01-31 15:11:48,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:48,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954933817] [2022-01-31 15:11:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:48,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:48,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:11:48,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242864138] [2022-01-31 15:11:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:48,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:48,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:48,285 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 15:11:48,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 15:11:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:11:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 15:11:48,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:11:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-01-31 15:11:48,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:11:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-01-31 15:11:49,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:49,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954933817] [2022-01-31 15:11:49,276 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:11:49,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242864138] [2022-01-31 15:11:49,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242864138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:11:49,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:11:49,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-31 15:11:49,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56463929] [2022-01-31 15:11:49,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:11:49,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 15:11:49,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:49,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 15:11:49,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:11:49,277 INFO L87 Difference]: Start difference. First operand 166 states and 217 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-31 15:11:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:49,428 INFO L93 Difference]: Finished difference Result 180 states and 237 transitions. [2022-01-31 15:11:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 15:11:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 110 [2022-01-31 15:11:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:49,430 INFO L225 Difference]: With dead ends: 180 [2022-01-31 15:11:49,430 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 15:11:49,430 INFO L932 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 [2022-01-31 15:11:49,430 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:49,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 391 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:11:49,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 15:11:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-01-31 15:11:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 108 states have internal predecessors, (125), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 15:11:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2022-01-31 15:11:49,437 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 110 [2022-01-31 15:11:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:49,437 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2022-01-31 15:11:49,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-31 15:11:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2022-01-31 15:11:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 15:11:49,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:49,439 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 3, 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] [2022-01-31 15:11:49,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 15:11:49,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 15:11:49,655 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:49,656 INFO L85 PathProgramCache]: Analyzing trace with hash 564418017, now seen corresponding path program 2 times [2022-01-31 15:11:49,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:49,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372828222] [2022-01-31 15:11:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:49,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:49,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:11:49,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285855953] [2022-01-31 15:11:49,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 15:11:49,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:49,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:49,667 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) [2022-01-31 15:11:49,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 15:11:49,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 15:11:49,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:11:49,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 15:11:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:11:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 102 proven. 42 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-01-31 15:11:49,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:11:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-01-31 15:11:50,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:11:50,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372828222] [2022-01-31 15:11:50,220 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:11:50,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285855953] [2022-01-31 15:11:50,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285855953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:11:50,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:11:50,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-01-31 15:11:50,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799175294] [2022-01-31 15:11:50,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:11:50,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 15:11:50,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:11:50,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 15:11:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 15:11:50,221 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-01-31 15:11:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:11:50,292 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2022-01-31 15:11:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:11:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 123 [2022-01-31 15:11:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:11:50,295 INFO L225 Difference]: With dead ends: 159 [2022-01-31 15:11:50,295 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 15:11:50,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 15:11:50,296 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:11:50,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 204 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:11:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 15:11:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-01-31 15:11:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 86 states have internal predecessors, (95), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 15:11:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 167 transitions. [2022-01-31 15:11:50,302 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 167 transitions. Word has length 123 [2022-01-31 15:11:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:11:50,302 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 167 transitions. [2022-01-31 15:11:50,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-01-31 15:11:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 167 transitions. [2022-01-31 15:11:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 15:11:50,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:11:50,303 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:11:50,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 15:11:50,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:50,520 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:11:50,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:11:50,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1567600662, now seen corresponding path program 3 times [2022-01-31 15:11:50,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:11:50,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771251703] [2022-01-31 15:11:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:11:50,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:11:50,526 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:11:50,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827717316] [2022-01-31 15:11:50,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 15:11:50,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:11:50,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:11:50,528 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) [2022-01-31 15:11:50,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 15:11:50,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 15:11:50,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:11:50,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 15:11:50,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:11:50,827 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 15:11:50,879 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 15:11:50,975 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 15:11:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-01-31 15:11:51,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:12:02,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:12:02,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771251703] [2022-01-31 15:12:02,326 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:12:02,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827717316] [2022-01-31 15:12:02,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827717316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 15:12:02,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 15:12:02,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 15:12:02,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238537897] [2022-01-31 15:12:02,327 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 15:12:02,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 15:12:02,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:12:02,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 15:12:02,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-31 15:12:02,328 INFO L87 Difference]: Start difference. First operand 136 states and 167 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 15:12:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:12:02,396 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2022-01-31 15:12:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 15:12:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 124 [2022-01-31 15:12:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:12:02,397 INFO L225 Difference]: With dead ends: 140 [2022-01-31 15:12:02,397 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 15:12:02,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-31 15:12:02,398 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:12:02,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 120 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:12:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 15:12:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2022-01-31 15:12:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 29 states have call successors, (29), 17 states have call predecessors, (29), 15 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 15:12:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2022-01-31 15:12:02,403 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 124 [2022-01-31 15:12:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:12:02,403 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2022-01-31 15:12:02,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 15:12:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2022-01-31 15:12:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 15:12:02,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:12:02,404 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:12:02,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 15:12:02,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 15:12:02,620 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:12:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:12:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1333998901, now seen corresponding path program 3 times [2022-01-31 15:12:02,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:12:02,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908998518] [2022-01-31 15:12:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:12:02,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:12:02,627 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:12:02,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085909497] [2022-01-31 15:12:02,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 15:12:02,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:12:02,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:12:02,629 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) [2022-01-31 15:12:02,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 15:12:02,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 15:12:02,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 15:12:02,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 15:12:02,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:12:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-01-31 15:12:02,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:12:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-01-31 15:12:03,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:12:03,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908998518] [2022-01-31 15:12:03,068 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:12:03,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085909497] [2022-01-31 15:12:03,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085909497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:12:03,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:12:03,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-01-31 15:12:03,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007275679] [2022-01-31 15:12:03,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:12:03,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 15:12:03,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:12:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 15:12:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 15:12:03,070 INFO L87 Difference]: Start difference. First operand 118 states and 137 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, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-31 15:12:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:12:03,164 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2022-01-31 15:12:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 15:12:03,165 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, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 127 [2022-01-31 15:12:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:12:03,165 INFO L225 Difference]: With dead ends: 124 [2022-01-31 15:12:03,165 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 15:12:03,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-31 15:12:03,166 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:12:03,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 153 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:12:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 15:12:03,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 15:12:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 15:12:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 15:12:03,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 127 [2022-01-31 15:12:03,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:12:03,167 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 15:12:03,167 INFO L471 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, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-31 15:12:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 15:12:03,167 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 15:12:03,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 15:12:03,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 15:12:03,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 15:12:03,387 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:12:03,388 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 15:12:03,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 03:12:03 BasicIcfg [2022-01-31 15:12:03,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 15:12:03,390 INFO L158 Benchmark]: Toolchain (without parser) took 60064.05ms. Allocated memory was 201.3MB in the beginning and 291.5MB in the end (delta: 90.2MB). Free memory was 151.9MB in the beginning and 167.0MB in the end (delta: -15.2MB). Peak memory consumption was 76.0MB. Max. memory is 8.0GB. [2022-01-31 15:12:03,390 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 201.3MB. Free memory is still 168.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 15:12:03,390 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.58ms. Allocated memory is still 201.3MB. Free memory was 151.7MB in the beginning and 174.0MB in the end (delta: -22.3MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-01-31 15:12:03,390 INFO L158 Benchmark]: Boogie Preprocessor took 36.40ms. Allocated memory is still 201.3MB. Free memory was 174.0MB in the beginning and 172.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 15:12:03,390 INFO L158 Benchmark]: RCFGBuilder took 223.91ms. Allocated memory is still 201.3MB. Free memory was 172.5MB in the beginning and 162.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 15:12:03,390 INFO L158 Benchmark]: IcfgTransformer took 32.83ms. Allocated memory is still 201.3MB. Free memory was 162.0MB in the beginning and 160.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 15:12:03,391 INFO L158 Benchmark]: TraceAbstraction took 59599.69ms. Allocated memory was 201.3MB in the beginning and 291.5MB in the end (delta: 90.2MB). Free memory was 159.9MB in the beginning and 167.0MB in the end (delta: -7.1MB). Peak memory consumption was 84.1MB. Max. memory is 8.0GB. [2022-01-31 15:12:03,392 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 201.3MB. Free memory is still 168.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 165.58ms. Allocated memory is still 201.3MB. Free memory was 151.7MB in the beginning and 174.0MB in the end (delta: -22.3MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.40ms. Allocated memory is still 201.3MB. Free memory was 174.0MB in the beginning and 172.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 223.91ms. Allocated memory is still 201.3MB. Free memory was 172.5MB in the beginning and 162.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 32.83ms. Allocated memory is still 201.3MB. Free memory was 162.0MB in the beginning and 160.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 59599.69ms. Allocated memory was 201.3MB in the beginning and 291.5MB in the end (delta: 90.2MB). Free memory was 159.9MB in the beginning and 167.0MB in the end (delta: -7.1MB). Peak memory consumption was 84.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 59.5s, OverallIterations: 14, TraceHistogramMax: 20, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 20.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 410 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 339 mSDsluCounter, 2533 SdHoareTripleChecker+Invalid, 7.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1965 mSDsCounter, 447 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1808 IncrementalHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 447 mSolverCounterUnsat, 568 mSDtfsCounter, 1808 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1452 SyntacticMatches, 22 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 17.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=11, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 35.6s InterpolantComputationTime, 962 NumberOfCodeBlocks, 840 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1578 ConstructedInterpolants, 0 QuantifiedInterpolants, 16023 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1954 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 6338/6540 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 15:12:03,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...