/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:52:19,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:52:19,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:52:19,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 22:52:19,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 22:52:19,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 22:52:19,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 22:52:19,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 22:52:19,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 22:52:19,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 22:52:19,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 22:52:19,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 22:52:19,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:52:19,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:52:19,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:52:19,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:52:19,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:52:19,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:52:19,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:52:19,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:52:19,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:52:19,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:52:19,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:52:19,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:52:19,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 22:52:19,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 22:52:19,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 22:52:19,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 22:52:19,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 22:52:19,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 22:52:19,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 22:52:19,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 22:52:19,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 22:52:19,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:52:19,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:52:19,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:52:19,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:52:19,373 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:52:19,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:52:19,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:52:19,375 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:52:19,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:52:19,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:52:19,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:52:19,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:52:19,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:52:19,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:52:19,376 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:52:19,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:52:19,376 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:52:19,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:52:19,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:52:19,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:52:19,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:52:19,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:52:19,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:52:19,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:52:19,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:52:19,377 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:52:19,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:52:19,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:52:19,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:52:19,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:52:19,572 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:52:19,573 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:52:19,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-02-14 22:52:19,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ca993fa/00b0825194894f429ff1d7230defe8bb/FLAG822c1b6f2 [2022-02-14 22:52:19,945 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:52:19,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-02-14 22:52:19,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ca993fa/00b0825194894f429ff1d7230defe8bb/FLAG822c1b6f2 [2022-02-14 22:52:20,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ca993fa/00b0825194894f429ff1d7230defe8bb [2022-02-14 22:52:20,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:52:20,384 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:52:20,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:52:20,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:52:20,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:52:20,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f57159a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20, skipping insertion in model container [2022-02-14 22:52:20,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:52:20,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:52:20,566 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2022-02-14 22:52:20,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:52:20,597 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:52:20,605 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2022-02-14 22:52:20,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:52:20,619 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:52:20,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20 WrapperNode [2022-02-14 22:52:20,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:52:20,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:52:20,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:52:20,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:52:20,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:52:20,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:52:20,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:52:20,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:52:20,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:52:20,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:20,700 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) [2022-02-14 22:52:20,705 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 [2022-02-14 22:52:20,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:52:20,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:52:20,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:52:20,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:52:20,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:52:20,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:52:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:52:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:52:20,782 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:52:20,783 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:52:20,914 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:52:20,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:52:20,919 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 22:52:20,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:52:20 BoogieIcfgContainer [2022-02-14 22:52:20,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:52:20,920 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:52:20,920 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:52:20,924 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:52:20,926 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:52:20" (1/1) ... [2022-02-14 22:52:20,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:52:20 BasicIcfg [2022-02-14 22:52:20,947 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:52:20,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:52:20,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:52:20,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:52:20,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:52:20" (1/4) ... [2022-02-14 22:52:20,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e9a889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:52:20, skipping insertion in model container [2022-02-14 22:52:20,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:20" (2/4) ... [2022-02-14 22:52:20,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e9a889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:52:20, skipping insertion in model container [2022-02-14 22:52:20,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:52:20" (3/4) ... [2022-02-14 22:52:20,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e9a889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:52:20, skipping insertion in model container [2022-02-14 22:52:20,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:52:20" (4/4) ... [2022-02-14 22:52:20,965 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.cJordan [2022-02-14 22:52:20,968 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:52:20,969 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:52:20,997 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:52:21,001 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 [2022-02-14 22:52:21,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:52:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 22:52:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-14 22:52:21,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:21,017 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:21,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:21,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:21,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-02-14 22:52:21,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:21,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381782133] [2022-02-14 22:52:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:21,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:21,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:52:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:52:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:21,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 22:52:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:21,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 22:52:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:21,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 22:52:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:21,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-14 22:52:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:21,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 22:52:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 22:52:21,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:21,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381782133] [2022-02-14 22:52:21,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381782133] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:52:21,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:52:21,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 22:52:21,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644604725] [2022-02-14 22:52:21,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:52:21,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 22:52:21,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 22:52:21,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:52:21,217 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 22:52:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:21,287 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-02-14 22:52:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 22:52:21,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-02-14 22:52:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:21,295 INFO L225 Difference]: With dead ends: 40 [2022-02-14 22:52:21,295 INFO L226 Difference]: Without dead ends: 35 [2022-02-14 22:52:21,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:52:21,300 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:21,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:52:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-14 22:52:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-14 22:52:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 22:52:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-02-14 22:52:21,340 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-02-14 22:52:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:21,340 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-02-14 22:52:21,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 22:52:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-02-14 22:52:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-14 22:52:21,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:21,342 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:21,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 22:52:21,342 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:21,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-02-14 22:52:21,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:21,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912405509] [2022-02-14 22:52:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:21,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:21,377 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:21,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179639609] [2022-02-14 22:52:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:21,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:21,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:21,395 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) [2022-02-14 22:52:21,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 22:52:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:52:21,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-14 22:52:21,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-14 22:52:21,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:21,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912405509] [2022-02-14 22:52:21,682 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:21,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179639609] [2022-02-14 22:52:21,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179639609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:52:21,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:52:21,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-02-14 22:52:21,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464354574] [2022-02-14 22:52:21,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:52:21,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 22:52:21,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:21,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 22:52:21,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-14 22:52:21,685 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 22:52:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:21,740 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-02-14 22:52:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:52:21,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-02-14 22:52:21,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:21,742 INFO L225 Difference]: With dead ends: 44 [2022-02-14 22:52:21,742 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 22:52:21,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-14 22:52:21,743 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:21,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 124 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:52:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 22:52:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-14 22:52:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 22:52:21,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-02-14 22:52:21,750 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-02-14 22:52:21,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:21,750 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-02-14 22:52:21,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 22:52:21,751 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-02-14 22:52:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-14 22:52:21,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:21,751 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:21,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 22:52:21,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:21,970 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-02-14 22:52:21,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:21,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781967288] [2022-02-14 22:52:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:21,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:21,985 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:21,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560946461] [2022-02-14 22:52:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:21,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:21,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:21,987 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) [2022-02-14 22:52:21,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 22:52:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:22,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 22:52:22,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-14 22:52:22,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 22:52:22,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:22,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781967288] [2022-02-14 22:52:22,222 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:22,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560946461] [2022-02-14 22:52:22,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560946461] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 22:52:22,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:52:22,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-14 22:52:22,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142340728] [2022-02-14 22:52:22,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:52:22,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:52:22,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:52:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:52:22,224 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-14 22:52:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:22,252 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-02-14 22:52:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:52:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-02-14 22:52:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:22,253 INFO L225 Difference]: With dead ends: 41 [2022-02-14 22:52:22,253 INFO L226 Difference]: Without dead ends: 41 [2022-02-14 22:52:22,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:52:22,254 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:22,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:52:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-14 22:52:22,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-14 22:52:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 22:52:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-02-14 22:52:22,259 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-02-14 22:52:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:22,259 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-02-14 22:52:22,260 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-14 22:52:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-02-14 22:52:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 22:52:22,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:22,261 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:22,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 22:52:22,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-14 22:52:22,489 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:22,489 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-02-14 22:52:22,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:22,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350005516] [2022-02-14 22:52:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:22,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:22,507 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:22,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763557693] [2022-02-14 22:52:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:22,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:22,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:22,520 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) [2022-02-14 22:52:22,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 22:52:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:22,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 22:52:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-14 22:52:22,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:22,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:22,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350005516] [2022-02-14 22:52:22,818 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:22,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763557693] [2022-02-14 22:52:22,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763557693] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:52:22,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:52:22,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-02-14 22:52:22,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586056598] [2022-02-14 22:52:22,819 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:52:22,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 22:52:22,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:22,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 22:52:22,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:52:22,821 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:52:22,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:22,954 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-14 22:52:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 22:52:22,955 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-02-14 22:52:22,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:22,955 INFO L225 Difference]: With dead ends: 52 [2022-02-14 22:52:22,955 INFO L226 Difference]: Without dead ends: 52 [2022-02-14 22:52:22,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:52:22,956 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:22,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:52:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-14 22:52:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-02-14 22:52:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 22:52:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-02-14 22:52:22,961 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-02-14 22:52:22,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:22,961 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-02-14 22:52:22,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:52:22,961 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-02-14 22:52:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-14 22:52:22,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:22,962 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:22,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 22:52:23,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:23,180 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:23,181 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-02-14 22:52:23,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:23,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014620012] [2022-02-14 22:52:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:23,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:23,190 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:23,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820164045] [2022-02-14 22:52:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:23,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:23,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:23,191 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) [2022-02-14 22:52:23,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 22:52:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:23,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 22:52:23,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 22:52:23,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-14 22:52:23,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:23,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014620012] [2022-02-14 22:52:23,518 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:23,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820164045] [2022-02-14 22:52:23,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820164045] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 22:52:23,519 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:52:23,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-14 22:52:23,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456193634] [2022-02-14 22:52:23,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:52:23,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:52:23,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:23,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:52:23,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:52:23,520 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-14 22:52:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:23,555 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-02-14 22:52:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:52:23,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-02-14 22:52:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:23,556 INFO L225 Difference]: With dead ends: 56 [2022-02-14 22:52:23,556 INFO L226 Difference]: Without dead ends: 56 [2022-02-14 22:52:23,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:52:23,557 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:23,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:52:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-14 22:52:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-02-14 22:52:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 22:52:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-14 22:52:23,561 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-02-14 22:52:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:23,562 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-14 22:52:23,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-14 22:52:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-14 22:52:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-14 22:52:23,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:23,562 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:23,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 22:52:23,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:23,763 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-02-14 22:52:23,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:23,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81852247] [2022-02-14 22:52:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:23,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:23,788 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:23,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744749808] [2022-02-14 22:52:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:23,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:23,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:23,807 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) [2022-02-14 22:52:23,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 22:52:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:23,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 22:52:23,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-02-14 22:52:24,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:24,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:24,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81852247] [2022-02-14 22:52:24,088 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:24,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744749808] [2022-02-14 22:52:24,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744749808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:52:24,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:52:24,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-14 22:52:24,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61704977] [2022-02-14 22:52:24,089 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:52:24,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 22:52:24,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 22:52:24,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-14 22:52:24,090 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-14 22:52:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:24,162 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-02-14 22:52:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 22:52:24,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-02-14 22:52:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:24,163 INFO L225 Difference]: With dead ends: 60 [2022-02-14 22:52:24,163 INFO L226 Difference]: Without dead ends: 60 [2022-02-14 22:52:24,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:52:24,164 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:24,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:52:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-14 22:52:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-02-14 22:52:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 22:52:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-02-14 22:52:24,168 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-02-14 22:52:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:24,168 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-02-14 22:52:24,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-14 22:52:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-02-14 22:52:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-14 22:52:24,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:24,169 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:24,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 22:52:24,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:24,386 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:24,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-02-14 22:52:24,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:24,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790544376] [2022-02-14 22:52:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:24,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:24,397 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:24,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899755507] [2022-02-14 22:52:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:24,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:24,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:24,398 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) [2022-02-14 22:52:24,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 22:52:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:52:24,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-02-14 22:52:24,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-02-14 22:52:24,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:24,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790544376] [2022-02-14 22:52:24,681 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:24,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899755507] [2022-02-14 22:52:24,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899755507] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:52:24,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:52:24,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-14 22:52:24,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200613544] [2022-02-14 22:52:24,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:52:24,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 22:52:24,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 22:52:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-14 22:52:24,682 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-02-14 22:52:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:24,798 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-14 22:52:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:52:24,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-02-14 22:52:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:24,801 INFO L225 Difference]: With dead ends: 98 [2022-02-14 22:52:24,801 INFO L226 Difference]: Without dead ends: 98 [2022-02-14 22:52:24,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:52:24,802 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:24,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 281 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:52:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-14 22:52:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-02-14 22:52:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 22:52:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-02-14 22:52:24,808 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-02-14 22:52:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:24,809 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-02-14 22:52:24,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-02-14 22:52:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-02-14 22:52:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-14 22:52:24,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:24,810 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:24,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 22:52:25,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:25,028 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-02-14 22:52:25,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:25,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650253994] [2022-02-14 22:52:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:25,036 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:25,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477842458] [2022-02-14 22:52:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:25,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:25,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:25,039 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) [2022-02-14 22:52:25,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 22:52:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 22:52:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-14 22:52:25,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-14 22:52:25,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:25,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650253994] [2022-02-14 22:52:25,406 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:25,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477842458] [2022-02-14 22:52:25,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477842458] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:52:25,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:52:25,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-02-14 22:52:25,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417069806] [2022-02-14 22:52:25,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:52:25,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 22:52:25,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 22:52:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:52:25,407 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-14 22:52:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:25,588 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2022-02-14 22:52:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 22:52:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-02-14 22:52:25,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:25,590 INFO L225 Difference]: With dead ends: 130 [2022-02-14 22:52:25,590 INFO L226 Difference]: Without dead ends: 128 [2022-02-14 22:52:25,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-14 22:52:25,591 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:25,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 329 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:52:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-14 22:52:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-02-14 22:52:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 22:52:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-02-14 22:52:25,598 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-02-14 22:52:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:25,598 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-02-14 22:52:25,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-14 22:52:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-02-14 22:52:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-14 22:52:25,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:25,599 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:25,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-14 22:52:25,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:25,815 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-02-14 22:52:25,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:25,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909832065] [2022-02-14 22:52:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:25,823 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:25,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396826992] [2022-02-14 22:52:25,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:52:25,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:25,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:25,840 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) [2022-02-14 22:52:25,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 22:52:25,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:52:25,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:52:25,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-14 22:52:25,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-02-14 22:52:26,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-02-14 22:52:26,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:26,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909832065] [2022-02-14 22:52:26,521 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:26,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396826992] [2022-02-14 22:52:26,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396826992] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:52:26,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:52:26,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-02-14 22:52:26,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539831894] [2022-02-14 22:52:26,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:52:26,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 22:52:26,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:26,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 22:52:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-14 22:52:26,525 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-02-14 22:52:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:27,450 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2022-02-14 22:52:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 22:52:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-02-14 22:52:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:27,451 INFO L225 Difference]: With dead ends: 126 [2022-02-14 22:52:27,451 INFO L226 Difference]: Without dead ends: 126 [2022-02-14 22:52:27,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-02-14 22:52:27,452 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:27,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 330 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 22:52:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-14 22:52:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-02-14 22:52:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-14 22:52:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-02-14 22:52:27,458 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-02-14 22:52:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:27,458 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-02-14 22:52:27,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-02-14 22:52:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-02-14 22:52:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-14 22:52:27,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:27,459 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:27,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 22:52:27,671 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,SelfDestructingSolverStorable8 [2022-02-14 22:52:27,672 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-02-14 22:52:27,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:27,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517976887] [2022-02-14 22:52:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:27,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:27,680 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:27,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923577986] [2022-02-14 22:52:27,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:52:27,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:27,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:27,681 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) [2022-02-14 22:52:27,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 22:52:27,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-14 22:52:27,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:52:27,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 22:52:27,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-02-14 22:52:28,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:28,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:28,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517976887] [2022-02-14 22:52:28,111 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:28,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923577986] [2022-02-14 22:52:28,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923577986] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:52:28,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:52:28,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-14 22:52:28,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861816410] [2022-02-14 22:52:28,111 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:52:28,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 22:52:28,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:28,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 22:52:28,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:52:28,112 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-14 22:52:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:28,248 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-02-14 22:52:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:52:28,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-02-14 22:52:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:28,250 INFO L225 Difference]: With dead ends: 142 [2022-02-14 22:52:28,250 INFO L226 Difference]: Without dead ends: 142 [2022-02-14 22:52:28,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:52:28,251 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:28,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:52:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-14 22:52:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-02-14 22:52:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-14 22:52:28,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-02-14 22:52:28,256 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-02-14 22:52:28,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:28,256 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-02-14 22:52:28,256 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), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-14 22:52:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-02-14 22:52:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 22:52:28,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:28,257 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:28,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 22:52:28,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-14 22:52:28,475 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-02-14 22:52:28,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:28,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11983346] [2022-02-14 22:52:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:28,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:28,484 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:28,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194003314] [2022-02-14 22:52:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:28,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:28,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:28,485 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) [2022-02-14 22:52:28,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 22:52:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:28,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-14 22:52:28,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-02-14 22:52:28,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-02-14 22:52:29,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:29,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11983346] [2022-02-14 22:52:29,314 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:29,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194003314] [2022-02-14 22:52:29,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194003314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:52:29,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:52:29,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-02-14 22:52:29,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053001713] [2022-02-14 22:52:29,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:52:29,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 22:52:29,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:29,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 22:52:29,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:52:29,316 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-14 22:52:31,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:31,258 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2022-02-14 22:52:31,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-14 22:52:31,258 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-02-14 22:52:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:31,261 INFO L225 Difference]: With dead ends: 226 [2022-02-14 22:52:31,261 INFO L226 Difference]: Without dead ends: 220 [2022-02-14 22:52:31,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-02-14 22:52:31,268 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 58 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:31,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 402 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-14 22:52:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-14 22:52:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-02-14 22:52:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-02-14 22:52:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-02-14 22:52:31,276 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-02-14 22:52:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:31,276 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-02-14 22:52:31,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-14 22:52:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-02-14 22:52:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-14 22:52:31,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:31,277 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:31,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 22:52:31,494 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,SelfDestructingSolverStorable10 [2022-02-14 22:52:31,494 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:31,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-02-14 22:52:31,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:31,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670866115] [2022-02-14 22:52:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:31,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:31,501 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:31,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370901040] [2022-02-14 22:52:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:31,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:31,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:31,508 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) [2022-02-14 22:52:31,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 22:52:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:52:31,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-14 22:52:31,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-02-14 22:52:32,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:32,350 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:52:37,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:37,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670866115] [2022-02-14 22:52:37,214 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:37,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370901040] [2022-02-14 22:52:37,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370901040] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:52:37,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:52:37,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-02-14 22:52:37,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486310022] [2022-02-14 22:52:37,215 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:52:37,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 22:52:37,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 22:52:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=164, Unknown=2, NotChecked=0, Total=210 [2022-02-14 22:52:37,216 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-14 22:52:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:37,778 INFO L93 Difference]: Finished difference Result 224 states and 304 transitions. [2022-02-14 22:52:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 22:52:37,778 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 107 [2022-02-14 22:52:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:37,779 INFO L225 Difference]: With dead ends: 224 [2022-02-14 22:52:37,779 INFO L226 Difference]: Without dead ends: 224 [2022-02-14 22:52:37,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=71, Invalid=269, Unknown=2, NotChecked=0, Total=342 [2022-02-14 22:52:37,780 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:37,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 323 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 22:52:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-14 22:52:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2022-02-14 22:52:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 120 states have internal predecessors, (140), 81 states have call successors, (81), 20 states have call predecessors, (81), 19 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-02-14 22:52:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 300 transitions. [2022-02-14 22:52:37,787 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 300 transitions. Word has length 107 [2022-02-14 22:52:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:37,787 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 300 transitions. [2022-02-14 22:52:37,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-14 22:52:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 300 transitions. [2022-02-14 22:52:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-14 22:52:37,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:37,788 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:37,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-14 22:52:38,003 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,SelfDestructingSolverStorable11 [2022-02-14 22:52:38,004 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash -426906627, now seen corresponding path program 4 times [2022-02-14 22:52:38,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:38,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385587161] [2022-02-14 22:52:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:38,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:38,011 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:38,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330001033] [2022-02-14 22:52:38,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 22:52:38,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:38,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:38,015 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:52:38,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 22:52:38,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 22:52:38,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:52:38,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 22:52:38,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-02-14 22:52:38,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:52:38,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:38,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385587161] [2022-02-14 22:52:38,201 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:38,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330001033] [2022-02-14 22:52:38,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330001033] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:52:38,201 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:52:38,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:52:38,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845536970] [2022-02-14 22:52:38,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:52:38,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:52:38,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:38,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:52:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:52:38,202 INFO L87 Difference]: Start difference. First operand 220 states and 300 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-02-14 22:52:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:38,241 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2022-02-14 22:52:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:52:38,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-02-14 22:52:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:38,242 INFO L225 Difference]: With dead ends: 201 [2022-02-14 22:52:38,242 INFO L226 Difference]: Without dead ends: 201 [2022-02-14 22:52:38,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-14 22:52:38,243 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:38,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:52:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-14 22:52:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 154. [2022-02-14 22:52:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-14 22:52:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-02-14 22:52:38,247 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 110 [2022-02-14 22:52:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:38,248 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-02-14 22:52:38,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-02-14 22:52:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-02-14 22:52:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 22:52:38,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:38,249 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:38,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-14 22:52:38,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 22:52:38,465 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:38,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:38,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 2 times [2022-02-14 22:52:38,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:38,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704913423] [2022-02-14 22:52:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:38,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:38,490 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:38,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018994609] [2022-02-14 22:52:38,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:52:38,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:38,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:38,496 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:52:38,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-14 22:52:38,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:52:38,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:52:38,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 71 conjunts are in the unsatisfiable core [2022-02-14 22:52:38,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 142 proven. 88 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-02-14 22:52:39,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:44,771 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:52:45,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:52:45,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704913423] [2022-02-14 22:52:45,986 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:52:45,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018994609] [2022-02-14 22:52:45,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018994609] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:52:45,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:52:45,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-02-14 22:52:45,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945682451] [2022-02-14 22:52:45,986 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:52:45,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 22:52:45,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:52:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 22:52:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=437, Unknown=1, NotChecked=0, Total=552 [2022-02-14 22:52:45,987 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-02-14 22:52:47,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:52:47,334 INFO L93 Difference]: Finished difference Result 192 states and 248 transitions. [2022-02-14 22:52:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 22:52:47,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-02-14 22:52:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:52:47,335 INFO L225 Difference]: With dead ends: 192 [2022-02-14 22:52:47,335 INFO L226 Difference]: Without dead ends: 192 [2022-02-14 22:52:47,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=159, Invalid=652, Unknown=1, NotChecked=0, Total=812 [2022-02-14 22:52:47,336 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:52:47,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 299 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-14 22:52:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-14 22:52:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 154. [2022-02-14 22:52:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-14 22:52:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-02-14 22:52:47,340 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 129 [2022-02-14 22:52:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:52:47,341 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-02-14 22:52:47,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-02-14 22:52:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-02-14 22:52:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-14 22:52:47,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:52:47,342 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:52:47,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-14 22:52:47,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-14 22:52:47,551 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:52:47,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:52:47,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 3 times [2022-02-14 22:52:47,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:52:47,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528781862] [2022-02-14 22:52:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:52:47,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:52:47,567 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:52:47,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051255170] [2022-02-14 22:52:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:52:47,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:52:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:52:47,576 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:52:47,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-14 22:52:47,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-14 22:52:47,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:52:47,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 69 conjunts are in the unsatisfiable core [2022-02-14 22:52:47,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:52:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 100 proven. 48 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-02-14 22:52:48,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:52:54,964 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~s~0 c_main_~k~0)) (.cse3 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse5 (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) .cse3))) (.cse7 (+ c_main_~s~0 .cse2 (* (- 1) c_main_~r~0)))) (let ((.cse4 (* .cse7 c_main_~y~0)) (.cse6 (* .cse5 c_main_~x~0))) (let ((.cse8 (+ .cse4 .cse6))) (or (not (let ((.cse1 (+ c_main_~p~0 .cse3)) (.cse0 (+ c_main_~r~0 (* (- 1) .cse2)))) (= (+ (* .cse0 c_main_~y~0) (* .cse1 c_main_~x~0) (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse1) c_main_~c~0 (* c_main_~yy~0 .cse0))))) (= (+ .cse4 (* .cse5 c_main_~xy~0) .cse6 (* c_main_~yy~0 .cse7)) (+ (* .cse8 c_main_~y~0) .cse4 .cse6)) (not (= (+ c_main_~b~0 (* (- 1) c_main_~c~0)) .cse8))))))) is different from true [2022-02-14 22:53:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 100 proven. 30 refuted. 0 times theorem prover too weak. 402 trivial. 18 not checked. [2022-02-14 22:53:16,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:53:16,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528781862] [2022-02-14 22:53:16,077 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:53:16,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051255170] [2022-02-14 22:53:16,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051255170] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:53:16,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:53:16,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-02-14 22:53:16,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777075509] [2022-02-14 22:53:16,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:53:16,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-14 22:53:16,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:53:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-14 22:53:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=325, Unknown=1, NotChecked=38, Total=462 [2022-02-14 22:53:16,079 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-02-14 22:53:18,278 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 [] [2022-02-14 22:53:29,931 WARN L228 SmtUtils]: Spent 10.18s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 22:53:31,965 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~q~0 c_main_~x~0)) (.cse2 (* c_main_~s~0 c_main_~y~0))) (let ((.cse0 (= (+ .cse1 .cse2 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0)))) (let ((.cse5 (not .cse0)) (.cse4 (* (- 1) c_main_~b~0)) (.cse19 (* (- 1) c_main_~r~0)) (.cse20 (* (- 1) c_main_~p~0))) (and (or .cse0 (not (= c_main_~b~0 (+ .cse1 .cse2)))) (let ((.cse6 (+ (* (- 1) c_main_~q~0) c_main_~p~0)) (.cse9 (+ (* (- 1) c_main_~s~0) c_main_~r~0))) (let ((.cse7 (* .cse9 c_main_~y~0)) (.cse8 (* .cse6 c_main_~x~0))) (let ((.cse3 (+ .cse7 .cse8))) (or (not (= .cse3 (+ .cse4 c_main_~a~0))) .cse5 (= (+ (* .cse6 c_main_~xy~0) .cse7 .cse8 (* c_main_~yy~0 .cse9)) (+ .cse7 .cse8 (* .cse3 c_main_~y~0))))))) (let ((.cse13 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse11 (* c_main_~p~0 c_main_~x~0)) (.cse12 (* c_main_~r~0 c_main_~y~0)) (.cse14 (* (- 1) c_main_~q~0 c_main_~x~0))) (let ((.cse10 (+ c_main_~b~0 .cse13 .cse11 .cse12 .cse14))) (or (not (= (+ (* .cse10 c_main_~y~0) .cse11 .cse12) (+ c_main_~b~0 (* c_main_~yy~0 c_main_~r~0) .cse13 .cse11 .cse12 .cse14 (* c_main_~xy~0 c_main_~p~0)))) (not (= .cse10 c_main_~a~0)) (let ((.cse17 (+ c_main_~q~0 .cse20)) (.cse18 (+ c_main_~s~0 .cse19))) (let ((.cse15 (* c_main_~y~0 .cse18)) (.cse16 (* .cse17 c_main_~x~0))) (= (+ (* (+ .cse15 .cse16) c_main_~y~0) .cse15 .cse16) (+ .cse15 (* c_main_~xy~0 .cse17) .cse16 (* c_main_~yy~0 .cse18)))))))) (let ((.cse26 (+ c_main_~k~0 1))) (let ((.cse23 (+ (* (- 1) (* c_main_~s~0 .cse26)) c_main_~r~0)) (.cse22 (+ (* (- 1) c_main_~q~0 .cse26) c_main_~p~0))) (let ((.cse21 (* .cse22 c_main_~x~0)) (.cse24 (* .cse23 c_main_~y~0))) (let ((.cse25 (+ .cse21 .cse24))) (or .cse5 (= (+ .cse21 (* .cse22 c_main_~xy~0) (* c_main_~yy~0 .cse23) .cse24) (+ (* .cse25 c_main_~y~0) .cse21 .cse24)) (not (= .cse25 (+ .cse4 c_main_~c~0)))))))) (let ((.cse29 (* c_main_~s~0 c_main_~k~0)) (.cse30 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse32 (+ c_main_~q~0 .cse20 (* (- 1) .cse30))) (.cse34 (+ c_main_~s~0 .cse29 .cse19))) (let ((.cse31 (* .cse34 c_main_~y~0)) (.cse33 (* .cse32 c_main_~x~0))) (let ((.cse35 (+ .cse31 .cse33))) (or (not (let ((.cse28 (+ c_main_~p~0 .cse30)) (.cse27 (+ c_main_~r~0 (* (- 1) .cse29)))) (= (+ (* .cse27 c_main_~y~0) (* .cse28 c_main_~x~0) (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse28) c_main_~c~0 (* c_main_~yy~0 .cse27))))) (= (+ .cse31 (* .cse32 c_main_~xy~0) .cse33 (* c_main_~yy~0 .cse34)) (+ (* .cse35 c_main_~y~0) .cse31 .cse33)) (not (= (+ c_main_~b~0 (* (- 1) c_main_~c~0)) .cse35))))))))))) is different from false [2022-02-14 22:53:45,201 WARN L228 SmtUtils]: Spent 12.99s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 22:53:47,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:20,690 WARN L228 SmtUtils]: Spent 27.49s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 22:54:23,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:25,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:27,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:30,444 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:39,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:41,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:43,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:47,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:51,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:53,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:55,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:57,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:54:59,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:01,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:28,256 WARN L228 SmtUtils]: Spent 16.22s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 22:55:30,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:32,538 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:35,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:37,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:43,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:46,033 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:48,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:51,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:53,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:55,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:58,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:02,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:07,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:10,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:11,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:22,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:25,453 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 [] [2022-02-14 22:56:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:25,618 INFO L93 Difference]: Finished difference Result 285 states and 383 transitions. [2022-02-14 22:56:25,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-14 22:56:25,619 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 132 [2022-02-14 22:56:25,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:25,620 INFO L225 Difference]: With dead ends: 285 [2022-02-14 22:56:25,620 INFO L226 Difference]: Without dead ends: 285 [2022-02-14 22:56:25,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 241 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 128.7s TimeCoverageRelationStatistics Valid=453, Invalid=1266, Unknown=11, NotChecked=162, Total=1892 [2022-02-14 22:56:25,621 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 103 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 200 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 70.4s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:25,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 494 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 809 Invalid, 28 Unknown, 113 Unchecked, 70.4s Time] [2022-02-14 22:56:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-14 22:56:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2022-02-14 22:56:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 146 states have internal predecessors, (165), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-02-14 22:56:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 357 transitions. [2022-02-14 22:56:25,627 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 357 transitions. Word has length 132 [2022-02-14 22:56:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:25,628 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 357 transitions. [2022-02-14 22:56:25,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-02-14 22:56:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 357 transitions. [2022-02-14 22:56:25,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-14 22:56:25,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:25,629 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:25,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:25,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:25,829 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:25,830 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 2 times [2022-02-14 22:56:25,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:25,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874796702] [2022-02-14 22:56:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:25,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:25,837 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:25,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994326168] [2022-02-14 22:56:25,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:56:25,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:25,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:25,841 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:56:25,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-14 22:56:25,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:56:25,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:56:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-02-14 22:56:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-02-14 22:56:27,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:27,986 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:56:27,988 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:56:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-02-14 22:56:38,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:38,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874796702] [2022-02-14 22:56:38,720 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:38,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994326168] [2022-02-14 22:56:38,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994326168] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:56:38,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:56:38,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-02-14 22:56:38,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280433067] [2022-02-14 22:56:38,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:56:38,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-14 22:56:38,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:38,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-14 22:56:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=674, Unknown=3, NotChecked=0, Total=812 [2022-02-14 22:56:38,721 INFO L87 Difference]: Start difference. First operand 266 states and 357 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-02-14 22:56:48,608 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 [] [2022-02-14 22:56:51,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:56,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:58,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:02,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:04,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:06,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:08,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:10,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:31,185 WARN L228 SmtUtils]: Spent 18.38s on a formula simplification. DAG size of input: 118 DAG size of output: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 22:57:49,850 WARN L228 SmtUtils]: Spent 15.07s on a formula simplification. DAG size of input: 102 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 22:57:51,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:53,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:59,212 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 [] [2022-02-14 22:58:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:03,829 INFO L93 Difference]: Finished difference Result 358 states and 498 transitions. [2022-02-14 22:58:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-14 22:58:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) Word has length 138 [2022-02-14 22:58:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:03,831 INFO L225 Difference]: With dead ends: 358 [2022-02-14 22:58:03,831 INFO L226 Difference]: Without dead ends: 352 [2022-02-14 22:58:03,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 66.4s TimeCoverageRelationStatistics Valid=665, Invalid=2633, Unknown=8, NotChecked=0, Total=3306 [2022-02-14 22:58:03,832 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 119 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 256 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:03,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 601 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 796 Invalid, 12 Unknown, 0 Unchecked, 28.8s Time] [2022-02-14 22:58:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-14 22:58:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 306. [2022-02-14 22:58:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 165 states have internal predecessors, (187), 117 states have call successors, (117), 25 states have call predecessors, (117), 24 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-02-14 22:58:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 419 transitions. [2022-02-14 22:58:03,840 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 419 transitions. Word has length 138 [2022-02-14 22:58:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:03,840 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 419 transitions. [2022-02-14 22:58:03,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-02-14 22:58:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 419 transitions. [2022-02-14 22:58:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-14 22:58:03,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:03,842 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:03,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:04,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-14 22:58:04,049 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:04,049 INFO L85 PathProgramCache]: Analyzing trace with hash 980979816, now seen corresponding path program 3 times [2022-02-14 22:58:04,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:04,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403866304] [2022-02-14 22:58:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:04,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:04,056 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:04,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614956356] [2022-02-14 22:58:04,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:58:04,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:04,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:04,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:58:04,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-14 22:58:04,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 22:58:04,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:58:04,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-14 22:58:04,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:05,429 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:58:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 113 proven. 83 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2022-02-14 22:58:05,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:06,785 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:00:58,877 WARN L860 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_166 Int) (v_main_~s~0_BEFORE_CALL_208 Int) (v_main_~b~0_BEFORE_CALL_192 Int) (v_main_~p~0_BEFORE_CALL_156 Int) (v_main_~k~0_BEFORE_CALL_114 Int) (v_main_~x~0_BEFORE_CALL_222 Int) (v_main_~q~0_BEFORE_CALL_210 Int) (v_main_~y~0_BEFORE_CALL_219 Int)) (or (<= v_main_~b~0_BEFORE_CALL_192 0) (= (+ (* (+ v_main_~p~0_BEFORE_CALL_156 (* (- 1) v_main_~k~0_BEFORE_CALL_114 v_main_~q~0_BEFORE_CALL_210)) v_main_~x~0_BEFORE_CALL_222) (* v_main_~y~0_BEFORE_CALL_219 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_114 v_main_~s~0_BEFORE_CALL_208)) v_main_~r~0_BEFORE_CALL_166))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_114 v_main_~b~0_BEFORE_CALL_192) v_main_~b~0_BEFORE_CALL_192) 0))))) is different from true [2022-02-14 23:02:01,028 WARN L860 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_166 Int) (v_main_~s~0_BEFORE_CALL_208 Int) (v_main_~b~0_BEFORE_CALL_192 Int) (v_main_~p~0_BEFORE_CALL_156 Int) (v_main_~k~0_BEFORE_CALL_114 Int) (v_main_~x~0_BEFORE_CALL_222 Int) (v_main_~q~0_BEFORE_CALL_210 Int) (v_main_~y~0_BEFORE_CALL_219 Int)) (or (<= v_main_~b~0_BEFORE_CALL_192 0) (= (+ (* (+ v_main_~p~0_BEFORE_CALL_156 (* (- 1) v_main_~k~0_BEFORE_CALL_114 v_main_~q~0_BEFORE_CALL_210)) v_main_~x~0_BEFORE_CALL_222) (* v_main_~y~0_BEFORE_CALL_219 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_114 v_main_~s~0_BEFORE_CALL_208)) v_main_~r~0_BEFORE_CALL_166))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_114 v_main_~b~0_BEFORE_CALL_192) v_main_~b~0_BEFORE_CALL_192) 0))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-02-14 23:02:29,007 WARN L228 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 18 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-02-14 23:02:33,014 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~b~0_BEFORE_CALL_192 Int) (v_main_~k~0_BEFORE_CALL_114 Int)) (or (<= v_main_~b~0_BEFORE_CALL_192 0) (= (mod (* v_main_~k~0_BEFORE_CALL_114 v_main_~b~0_BEFORE_CALL_192) v_main_~b~0_BEFORE_CALL_192) 0)))) is different from true [2022-02-14 23:02:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 126 proven. 79 refuted. 12 times theorem prover too weak. 1090 trivial. 2 not checked. [2022-02-14 23:02:40,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:02:40,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403866304] [2022-02-14 23:02:40,523 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:02:40,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614956356] [2022-02-14 23:02:40,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614956356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:02:40,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:02:40,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2022-02-14 23:02:40,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383474141] [2022-02-14 23:02:40,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:02:40,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-14 23:02:40,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:02:40,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-14 23:02:40,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=556, Unknown=3, NotChecked=150, Total=812 [2022-02-14 23:02:40,525 INFO L87 Difference]: Start difference. First operand 306 states and 419 transitions. Second operand has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 11 states have call predecessors, (41), 13 states have call successors, (41) [2022-02-14 23:03:00,524 WARN L228 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:03:02,527 WARN L860 $PredicateComparison]: unable to prove that (and (<= 1 c___VERIFIER_assert_~cond) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_166 Int) (v_main_~s~0_BEFORE_CALL_208 Int) (v_main_~b~0_BEFORE_CALL_192 Int) (v_main_~p~0_BEFORE_CALL_156 Int) (v_main_~k~0_BEFORE_CALL_114 Int) (v_main_~x~0_BEFORE_CALL_222 Int) (v_main_~q~0_BEFORE_CALL_210 Int) (v_main_~y~0_BEFORE_CALL_219 Int)) (or (<= v_main_~b~0_BEFORE_CALL_192 0) (= (+ (* (+ v_main_~p~0_BEFORE_CALL_156 (* (- 1) v_main_~k~0_BEFORE_CALL_114 v_main_~q~0_BEFORE_CALL_210)) v_main_~x~0_BEFORE_CALL_222) (* v_main_~y~0_BEFORE_CALL_219 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_114 v_main_~s~0_BEFORE_CALL_208)) v_main_~r~0_BEFORE_CALL_166))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_114 v_main_~b~0_BEFORE_CALL_192) v_main_~b~0_BEFORE_CALL_192) 0))))) (= c___VERIFIER_assert_~cond 0))) is different from true [2022-02-14 23:03:14,095 WARN L860 $PredicateComparison]: unable to prove that (and (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_166 Int) (v_main_~s~0_BEFORE_CALL_208 Int) (v_main_~b~0_BEFORE_CALL_192 Int) (v_main_~p~0_BEFORE_CALL_156 Int) (v_main_~k~0_BEFORE_CALL_114 Int) (v_main_~x~0_BEFORE_CALL_222 Int) (v_main_~q~0_BEFORE_CALL_210 Int) (v_main_~y~0_BEFORE_CALL_219 Int)) (or (<= v_main_~b~0_BEFORE_CALL_192 0) (= (+ (* (+ v_main_~p~0_BEFORE_CALL_156 (* (- 1) v_main_~k~0_BEFORE_CALL_114 v_main_~q~0_BEFORE_CALL_210)) v_main_~x~0_BEFORE_CALL_222) (* v_main_~y~0_BEFORE_CALL_219 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_114 v_main_~s~0_BEFORE_CALL_208)) v_main_~r~0_BEFORE_CALL_166))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_114 v_main_~b~0_BEFORE_CALL_192) v_main_~b~0_BEFORE_CALL_192) 0))))) (= c___VERIFIER_assert_~cond 0))) is different from true [2022-02-14 23:03:17,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:03:23,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:03:25,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:03:28,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:03:30,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:03:48,311 WARN L228 SmtUtils]: Spent 14.56s on a formula simplification. DAG size of input: 106 DAG size of output: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:04:14,479 WARN L228 SmtUtils]: Spent 24.89s on a formula simplification. DAG size of input: 94 DAG size of output: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:04:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:04:22,929 INFO L93 Difference]: Finished difference Result 445 states and 621 transitions. [2022-02-14 23:04:22,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-14 23:04:22,930 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 11 states have call predecessors, (41), 13 states have call successors, (41) Word has length 182 [2022-02-14 23:04:22,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:04:22,931 INFO L225 Difference]: With dead ends: 445 [2022-02-14 23:04:22,931 INFO L226 Difference]: Without dead ends: 439 [2022-02-14 23:04:22,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 341 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 100.2s TimeCoverageRelationStatistics Valid=728, Invalid=2942, Unknown=10, NotChecked=610, Total=4290 [2022-02-14 23:04:22,933 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 78 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 148 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:04:22,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 632 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 636 Invalid, 5 Unknown, 339 Unchecked, 16.0s Time] [2022-02-14 23:04:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-02-14 23:04:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 371. [2022-02-14 23:04:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 200 states have (on average 1.12) internal successors, (224), 201 states have internal predecessors, (224), 141 states have call successors, (141), 30 states have call predecessors, (141), 29 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-02-14 23:04:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 504 transitions. [2022-02-14 23:04:22,941 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 504 transitions. Word has length 182 [2022-02-14 23:04:22,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:04:22,941 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 504 transitions. [2022-02-14 23:04:22,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 11 states have call predecessors, (41), 13 states have call successors, (41) [2022-02-14 23:04:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 504 transitions. [2022-02-14 23:04:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-02-14 23:04:22,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:04:22,943 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:04:22,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-14 23:04:23,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-14 23:04:23,148 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:04:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:04:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash 960900916, now seen corresponding path program 4 times [2022-02-14 23:04:23,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:04:23,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190944] [2022-02-14 23:04:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:04:23,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:04:23,162 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:04:23,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904756227] [2022-02-14 23:04:23,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 23:04:23,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:04:23,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:04:23,176 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:04:23,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-14 23:04:23,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 23:04:23,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:04:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 119 conjunts are in the unsatisfiable core [2022-02-14 23:04:23,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:04:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 289 proven. 371 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2022-02-14 23:04:26,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:04:28,310 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:04:28,312 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:04:28,317 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:05:41,797 WARN L228 SmtUtils]: Spent 38.07s on a formula simplification. DAG size of input: 95 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:05:41,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:05:41,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190944] [2022-02-14 23:05:41,799 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:05:41,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904756227] [2022-02-14 23:05:41,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904756227] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 23:05:41,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:05:41,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-02-14 23:05:41,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724387805] [2022-02-14 23:05:41,800 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 23:05:41,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 23:05:41,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:05:41,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 23:05:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=906, Unknown=10, NotChecked=0, Total=1122 [2022-02-14 23:05:41,801 INFO L87 Difference]: Start difference. First operand 371 states and 504 transitions. Second operand has 26 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 14 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 15 states have call predecessors, (34), 14 states have call successors, (34) [2022-02-14 23:05:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:05:48,538 INFO L93 Difference]: Finished difference Result 457 states and 621 transitions. [2022-02-14 23:05:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 23:05:48,539 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 14 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 15 states have call predecessors, (34), 14 states have call successors, (34) Word has length 201 [2022-02-14 23:05:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:05:48,541 INFO L225 Difference]: With dead ends: 457 [2022-02-14 23:05:48,541 INFO L226 Difference]: Without dead ends: 457 [2022-02-14 23:05:48,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 69.4s TimeCoverageRelationStatistics Valid=338, Invalid=1720, Unknown=12, NotChecked=0, Total=2070 [2022-02-14 23:05:48,541 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 57 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-14 23:05:48,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1081 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-14 23:05:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-02-14 23:05:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 453. [2022-02-14 23:05:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 243 states have (on average 1.123456790123457) internal successors, (273), 244 states have internal predecessors, (273), 173 states have call successors, (173), 37 states have call predecessors, (173), 36 states have return successors, (171), 171 states have call predecessors, (171), 171 states have call successors, (171) [2022-02-14 23:05:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 617 transitions. [2022-02-14 23:05:48,550 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 617 transitions. Word has length 201 [2022-02-14 23:05:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:05:48,551 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 617 transitions. [2022-02-14 23:05:48,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 20 states have internal predecessors, (44), 14 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 15 states have call predecessors, (34), 14 states have call successors, (34) [2022-02-14 23:05:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 617 transitions. [2022-02-14 23:05:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-02-14 23:05:48,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:05:48,553 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:05:48,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-14 23:05:48,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-14 23:05:48,769 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:05:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:05:48,769 INFO L85 PathProgramCache]: Analyzing trace with hash 105429672, now seen corresponding path program 5 times [2022-02-14 23:05:48,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:05:48,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196660497] [2022-02-14 23:05:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:05:48,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:05:48,779 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:05:48,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817917188] [2022-02-14 23:05:48,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 23:05:48,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:05:48,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:05:48,781 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:05:48,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-14 23:05:49,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-14 23:05:49,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:05:49,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 110 conjunts are in the unsatisfiable core [2022-02-14 23:05:49,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:05:51,753 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:05:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 237 proven. 330 refuted. 0 times theorem prover too weak. 1086 trivial. 0 not checked. [2022-02-14 23:05:52,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:05:56,705 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~q~0 c_main_~x~0)) (.cse2 (* (- 1) c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse4 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse5 (* (- 1) c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse6 (* c_main_~p~0 c_main_~x~0)) (.cse7 (* c_main_~r~0 c_main_~y~0)) (.cse8 (* (- 1) c_main_~q~0 c_main_~x~0)) (.cse9 (* c_main_~s~0 c_main_~y~0))) (let ((.cse0 (+ .cse1 .cse2 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9)) (.cse12 (* c_main_~s~0 c_main_~k~0)) (.cse11 (* (- 1) c_main_~q~0 c_main_~k~0))) (or (not (= c_main_~c~0 .cse0)) (not (let ((.cse10 (+ c_main_~r~0 (* (- 1) .cse12))) (.cse3 (+ c_main_~p~0 .cse11))) (= (+ .cse1 .cse2 (* c_main_~xy~0 .cse3) .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (* c_main_~yy~0 .cse10)) (+ (* .cse10 c_main_~y~0) (* .cse3 c_main_~x~0) (* .cse0 c_main_~y~0))))) (let ((.cse14 (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) .cse11))) (.cse16 (+ c_main_~s~0 .cse12 (* (- 1) c_main_~r~0)))) (let ((.cse13 (* .cse16 c_main_~y~0)) (.cse15 (* .cse14 c_main_~x~0))) (= (+ .cse13 (* .cse14 c_main_~xy~0) .cse15 (* c_main_~yy~0 .cse16)) (+ (* (+ .cse13 .cse15) c_main_~y~0) .cse13 .cse15)))) (<= (+ (* 2 .cse7) (* 2 .cse6)) (+ .cse1 .cse9 (* 2 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (* 2 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)))) (not (= c_main_~b~0 (+ .cse1 .cse9)))))) is different from true [2022-02-14 23:06:23,101 WARN L228 SmtUtils]: Spent 9.32s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)