/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 17:01:32,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 17:01:32,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 17:01:32,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 17:01:32,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 17:01:32,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 17:01:32,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 17:01:32,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 17:01:32,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 17:01:32,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 17:01:32,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 17:01:32,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 17:01:32,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 17:01:32,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 17:01:32,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 17:01:32,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 17:01:32,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 17:01:32,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 17:01:32,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 17:01:32,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 17:01:32,873 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 17:01:32,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 17:01:32,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 17:01:32,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 17:01:32,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 17:01:32,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 17:01:32,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 17:01:32,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 17:01:32,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 17:01:32,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 17:01:32,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 17:01:32,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 17:01:32,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 17:01:32,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 17:01:32,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 17:01:32,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 17:01:32,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 17:01:32,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 17:01:32,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 17:01:32,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 17:01:32,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 17:01:32,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 17:01:32,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 17:01:32,911 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 17:01:32,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 17:01:32,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 17:01:32,912 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 17:01:32,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 17:01:32,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 17:01:32,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 17:01:32,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 17:01:32,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 17:01:32,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 17:01:32,914 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 17:01:32,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 17:01:32,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 17:01:32,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 17:01:32,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 17:01:32,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 17:01:32,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 17:01:32,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 17:01:32,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 17:01:32,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 17:01:32,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 17:01:32,915 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 17:01:32,916 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 17:01:32,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 17:01:32,916 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 17:01:32,916 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 17:01:33,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 17:01:33,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 17:01:33,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 17:01:33,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 17:01:33,177 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 17:01:33,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2022-04-06 17:01:33,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2dcdcced/15ed0f9df1c14f1d998b230390cd7543/FLAGc945a484a [2022-04-06 17:01:33,660 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 17:01:33,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2022-04-06 17:01:33,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2dcdcced/15ed0f9df1c14f1d998b230390cd7543/FLAGc945a484a [2022-04-06 17:01:33,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2dcdcced/15ed0f9df1c14f1d998b230390cd7543 [2022-04-06 17:01:33,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 17:01:33,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 17:01:33,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 17:01:33,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 17:01:33,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 17:01:33,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:01:33" (1/1) ... [2022-04-06 17:01:33,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcfd08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33, skipping insertion in model container [2022-04-06 17:01:33,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:01:33" (1/1) ... [2022-04-06 17:01:33,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 17:01:33,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 17:01:33,907 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/hard-ll_unwindbound5.c[538,551] [2022-04-06 17:01:33,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 17:01:33,937 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 17:01:33,948 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/hard-ll_unwindbound5.c[538,551] [2022-04-06 17:01:33,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 17:01:33,980 INFO L208 MainTranslator]: Completed translation [2022-04-06 17:01:33,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33 WrapperNode [2022-04-06 17:01:33,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 17:01:33,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 17:01:33,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 17:01:33,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 17:01:33,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33" (1/1) ... [2022-04-06 17:01:33,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33" (1/1) ... [2022-04-06 17:01:33,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33" (1/1) ... [2022-04-06 17:01:33,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33" (1/1) ... [2022-04-06 17:01:34,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33" (1/1) ... [2022-04-06 17:01:34,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33" (1/1) ... [2022-04-06 17:01:34,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33" (1/1) ... [2022-04-06 17:01:34,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 17:01:34,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 17:01:34,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 17:01:34,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 17:01:34,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33" (1/1) ... [2022-04-06 17:01:34,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 17:01:34,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:34,056 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) [2022-04-06 17:01:34,072 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 [2022-04-06 17:01:34,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 17:01:34,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 17:01:34,105 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 17:01:34,105 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 17:01:34,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 17:01:34,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 17:01:34,106 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 17:01:34,106 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 17:01:34,106 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 17:01:34,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 17:01:34,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 17:01:34,107 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 17:01:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 17:01:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 17:01:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 17:01:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 17:01:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 17:01:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 17:01:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 17:01:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 17:01:34,168 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 17:01:34,169 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 17:01:34,343 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 17:01:34,348 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 17:01:34,349 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 17:01:34,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:01:34 BoogieIcfgContainer [2022-04-06 17:01:34,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 17:01:34,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 17:01:34,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 17:01:34,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 17:01:34,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 05:01:33" (1/3) ... [2022-04-06 17:01:34,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be36373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:01:34, skipping insertion in model container [2022-04-06 17:01:34,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:01:33" (2/3) ... [2022-04-06 17:01:34,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be36373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:01:34, skipping insertion in model container [2022-04-06 17:01:34,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:01:34" (3/3) ... [2022-04-06 17:01:34,368 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.c [2022-04-06 17:01:34,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 17:01:34,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 17:01:34,421 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 17:01:34,430 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 17:01:34,431 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 17:01:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 17:01:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 17:01:34,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:34,457 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:34,458 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2022-04-06 17:01:34,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:34,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408110308] [2022-04-06 17:01:34,482 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:01:34,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 2 times [2022-04-06 17:01:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:34,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860363051] [2022-04-06 17:01:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:01:34,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:01:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:01:34,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:01:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:01:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 17:01:34,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:34,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860363051] [2022-04-06 17:01:34,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860363051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:34,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:34,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 17:01:34,701 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:34,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408110308] [2022-04-06 17:01:34,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408110308] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:34,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:34,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 17:01:34,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608245594] [2022-04-06 17:01:34,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:34,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 17:01:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:34,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 17:01:34,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 17:01:34,739 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 17:01:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:34,858 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-04-06 17:01:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 17:01:34,861 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 17:01:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:34,868 INFO L225 Difference]: With dead ends: 66 [2022-04-06 17:01:34,868 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 17:01:34,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 17:01:34,875 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:34,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:01:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 17:01:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-06 17:01:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 17:01:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-06 17:01:34,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-04-06 17:01:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:34,925 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-06 17:01:34,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 17:01:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-06 17:01:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 17:01:34,927 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:34,927 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:34,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 17:01:34,928 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2022-04-06 17:01:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:34,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1181048828] [2022-04-06 17:01:34,938 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:01:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 2 times [2022-04-06 17:01:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:34,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518772642] [2022-04-06 17:01:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:34,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:01:35,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:01:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:01:35,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:01:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:01:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 17:01:35,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:35,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518772642] [2022-04-06 17:01:35,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518772642] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:35,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:35,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:01:35,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:35,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1181048828] [2022-04-06 17:01:35,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1181048828] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:35,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:35,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:01:35,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739787810] [2022-04-06 17:01:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:35,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:01:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:01:35,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:01:35,095 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 17:01:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:35,303 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-06 17:01:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 17:01:35,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 17:01:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:35,310 INFO L225 Difference]: With dead ends: 47 [2022-04-06 17:01:35,310 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 17:01:35,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:01:35,311 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:35,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:01:35,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 17:01:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-04-06 17:01:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 17:01:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-06 17:01:35,324 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-04-06 17:01:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:35,325 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-06 17:01:35,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 17:01:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-06 17:01:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 17:01:35,326 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:35,326 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:35,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 17:01:35,326 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2022-04-06 17:01:35,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:35,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149407986] [2022-04-06 17:01:35,331 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:01:35,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 2 times [2022-04-06 17:01:35,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:35,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591200910] [2022-04-06 17:01:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:35,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:35,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:35,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448758359] [2022-04-06 17:01:35,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:01:35,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:35,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:35,365 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) [2022-04-06 17:01:35,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 17:01:35,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 17:01:35,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:35,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 17:01:35,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 17:01:35,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:01:35,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:35,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591200910] [2022-04-06 17:01:35,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:35,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448758359] [2022-04-06 17:01:35,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448758359] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:35,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:35,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 17:01:35,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:35,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149407986] [2022-04-06 17:01:35,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149407986] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:35,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:35,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 17:01:35,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740095981] [2022-04-06 17:01:35,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:35,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 17:01:35,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:35,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 17:01:35,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 17:01:35,511 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 17:01:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:35,524 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-04-06 17:01:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 17:01:35,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-06 17:01:35,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:35,526 INFO L225 Difference]: With dead ends: 52 [2022-04-06 17:01:35,526 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 17:01:35,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 17:01:35,527 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:35,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:01:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 17:01:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 17:01:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 17:01:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-04-06 17:01:35,536 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-04-06 17:01:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:35,537 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-04-06 17:01:35,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 17:01:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-04-06 17:01:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 17:01:35,538 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:35,538 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:35,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 17:01:35,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:35,761 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:35,762 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2022-04-06 17:01:35,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:35,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1691184859] [2022-04-06 17:01:35,763 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:01:35,771 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 2 times [2022-04-06 17:01:35,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:35,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139257284] [2022-04-06 17:01:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:35,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:01:35,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:01:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:01:35,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:01:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:01:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 17:01:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:01:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 17:01:35,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:35,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139257284] [2022-04-06 17:01:35,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139257284] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:35,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:35,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:01:35,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:35,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1691184859] [2022-04-06 17:01:35,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1691184859] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:35,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:35,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:01:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802207239] [2022-04-06 17:01:35,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:35,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:01:35,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:01:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:01:35,850 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 17:01:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:36,028 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-06 17:01:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 17:01:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 17:01:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:36,034 INFO L225 Difference]: With dead ends: 52 [2022-04-06 17:01:36,037 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 17:01:36,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:01:36,043 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:36,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:01:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 17:01:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-04-06 17:01:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 17:01:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 17:01:36,053 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-04-06 17:01:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:36,053 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 17:01:36,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 17:01:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 17:01:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 17:01:36,054 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:36,054 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:36,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 17:01:36,054 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2022-04-06 17:01:36,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:36,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [58441182] [2022-04-06 17:01:36,061 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:01:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 2 times [2022-04-06 17:01:36,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045295152] [2022-04-06 17:01:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:36,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:36,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:36,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588157344] [2022-04-06 17:01:36,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:01:36,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:36,080 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) [2022-04-06 17:01:36,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 17:01:36,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:01:36,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:36,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 17:01:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 17:01:36,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:01:36,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:36,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045295152] [2022-04-06 17:01:36,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:36,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588157344] [2022-04-06 17:01:36,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588157344] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:36,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:36,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:01:36,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:36,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [58441182] [2022-04-06 17:01:36,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [58441182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:36,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:36,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:01:36,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879331254] [2022-04-06 17:01:36,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:36,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:01:36,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:36,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:01:36,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 17:01:36,260 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 17:01:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:36,343 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-04-06 17:01:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:01:36,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 17:01:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:36,345 INFO L225 Difference]: With dead ends: 71 [2022-04-06 17:01:36,345 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 17:01:36,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:01:36,346 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:36,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:01:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 17:01:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 17:01:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 17:01:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-04-06 17:01:36,370 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-04-06 17:01:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:36,370 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-04-06 17:01:36,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 17:01:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-04-06 17:01:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 17:01:36,374 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:36,374 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:36,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:36,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:36,580 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2022-04-06 17:01:36,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:36,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1653513353] [2022-04-06 17:01:36,581 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:01:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 2 times [2022-04-06 17:01:36,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:36,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857328722] [2022-04-06 17:01:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:36,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:36,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011470814] [2022-04-06 17:01:36,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:01:36,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:36,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:36,612 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) [2022-04-06 17:01:36,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 17:01:36,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:01:36,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:36,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 17:01:36,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 17:01:36,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:01:36,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857328722] [2022-04-06 17:01:36,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011470814] [2022-04-06 17:01:36,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011470814] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:36,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:36,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:01:36,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:36,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1653513353] [2022-04-06 17:01:36,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1653513353] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:36,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:36,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:01:36,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835867588] [2022-04-06 17:01:36,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:36,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:01:36,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:36,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:01:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 17:01:36,767 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 17:01:36,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:36,810 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-04-06 17:01:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:01:36,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-04-06 17:01:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:36,816 INFO L225 Difference]: With dead ends: 76 [2022-04-06 17:01:36,816 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 17:01:36,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 17:01:36,817 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:36,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:01:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 17:01:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-06 17:01:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 17:01:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-04-06 17:01:36,834 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-04-06 17:01:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:36,834 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-04-06 17:01:36,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 17:01:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-04-06 17:01:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 17:01:36,835 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:36,835 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:36,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:37,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:37,048 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:37,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2022-04-06 17:01:37,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:37,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749358546] [2022-04-06 17:01:37,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:01:37,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 2 times [2022-04-06 17:01:37,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:37,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959139431] [2022-04-06 17:01:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:37,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:37,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:37,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485932646] [2022-04-06 17:01:37,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:01:37,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:37,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:37,074 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) [2022-04-06 17:01:37,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 17:01:37,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:01:37,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:37,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 17:01:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 17:01:37,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:01:37,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:37,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959139431] [2022-04-06 17:01:37,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:37,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485932646] [2022-04-06 17:01:37,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485932646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:37,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:37,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:01:37,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:37,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749358546] [2022-04-06 17:01:37,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749358546] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:37,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:37,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:01:37,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761855011] [2022-04-06 17:01:37,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:37,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:01:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:37,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:01:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 17:01:37,255 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 17:01:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:37,326 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-04-06 17:01:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:01:37,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-06 17:01:37,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:37,329 INFO L225 Difference]: With dead ends: 82 [2022-04-06 17:01:37,329 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 17:01:37,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:01:37,331 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:37,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 118 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:01:37,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 17:01:37,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-04-06 17:01:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 17:01:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-04-06 17:01:37,358 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 36 [2022-04-06 17:01:37,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:37,358 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-04-06 17:01:37,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 17:01:37,358 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-04-06 17:01:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 17:01:37,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:37,365 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:37,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:37,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:37,580 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:37,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:37,580 INFO L85 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 1 times [2022-04-06 17:01:37,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:37,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1823517982] [2022-04-06 17:01:37,609 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:37,609 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:37,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 2 times [2022-04-06 17:01:37,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:37,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941853292] [2022-04-06 17:01:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:37,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:37,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:37,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104813889] [2022-04-06 17:01:37,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:01:37,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:37,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:37,633 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) [2022-04-06 17:01:37,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 17:01:37,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:01:37,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 17:01:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 17:01:37,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:01:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 17:01:37,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:37,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941853292] [2022-04-06 17:01:37,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:37,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104813889] [2022-04-06 17:01:37,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104813889] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:01:37,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:01:37,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 17:01:37,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:37,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1823517982] [2022-04-06 17:01:37,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1823517982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:37,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:37,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:01:37,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550093736] [2022-04-06 17:01:37,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:37,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:01:37,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:37,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:01:37,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 17:01:37,910 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 17:01:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:37,951 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-04-06 17:01:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 17:01:37,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2022-04-06 17:01:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:37,955 INFO L225 Difference]: With dead ends: 96 [2022-04-06 17:01:37,955 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 17:01:37,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 17:01:37,957 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:37,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 138 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:01:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 17:01:37,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 17:01:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 17:01:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-04-06 17:01:37,970 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 43 [2022-04-06 17:01:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:37,970 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-04-06 17:01:37,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 17:01:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-04-06 17:01:37,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 17:01:37,971 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:37,972 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:38,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:38,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:38,201 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2022-04-06 17:01:38,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:38,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730460250] [2022-04-06 17:01:38,206 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:38,206 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:38,207 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:38,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 2 times [2022-04-06 17:01:38,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:38,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479155533] [2022-04-06 17:01:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:38,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:38,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:38,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320088679] [2022-04-06 17:01:38,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:01:38,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:38,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:38,226 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) [2022-04-06 17:01:38,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 17:01:38,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:01:38,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:38,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 17:01:38,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 17:01:38,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:01:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 17:01:38,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479155533] [2022-04-06 17:01:38,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320088679] [2022-04-06 17:01:38,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320088679] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 17:01:38,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 17:01:38,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 17:01:38,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:38,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730460250] [2022-04-06 17:01:38,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730460250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:38,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:38,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:01:38,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896885885] [2022-04-06 17:01:38,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:38,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:01:38,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:01:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:01:38,660 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 17:01:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:38,720 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2022-04-06 17:01:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:01:38,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-04-06 17:01:38,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:38,722 INFO L225 Difference]: With dead ends: 84 [2022-04-06 17:01:38,722 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 17:01:38,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 17:01:38,725 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:38,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 125 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:01:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 17:01:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2022-04-06 17:01:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.2) internal successors, (60), 53 states have internal predecessors, (60), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 17:01:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-04-06 17:01:38,744 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 46 [2022-04-06 17:01:38,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:38,744 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-04-06 17:01:38,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 17:01:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-04-06 17:01:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 17:01:38,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:38,749 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:38,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:38,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:38,973 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:38,974 INFO L85 PathProgramCache]: Analyzing trace with hash 967982746, now seen corresponding path program 1 times [2022-04-06 17:01:38,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:38,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [588980373] [2022-04-06 17:01:38,978 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:38,979 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:38,979 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:38,979 INFO L85 PathProgramCache]: Analyzing trace with hash 967982746, now seen corresponding path program 2 times [2022-04-06 17:01:38,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:38,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229663496] [2022-04-06 17:01:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:38,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:38,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:38,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936575578] [2022-04-06 17:01:38,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:01:38,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:38,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:38,989 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) [2022-04-06 17:01:38,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 17:01:39,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:01:39,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:39,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 17:01:39,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 17:01:39,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:01:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 17:01:39,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:39,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229663496] [2022-04-06 17:01:39,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:39,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936575578] [2022-04-06 17:01:39,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936575578] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:01:39,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:01:39,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 17:01:39,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:39,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [588980373] [2022-04-06 17:01:39,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [588980373] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:39,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:39,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:01:39,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186860781] [2022-04-06 17:01:39,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:39,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:01:39,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:01:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 17:01:39,282 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 17:01:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:39,333 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2022-04-06 17:01:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 17:01:39,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 59 [2022-04-06 17:01:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:39,338 INFO L225 Difference]: With dead ends: 110 [2022-04-06 17:01:39,338 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 17:01:39,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 17:01:39,339 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:39,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 128 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:01:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 17:01:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-04-06 17:01:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 65 states have internal predecessors, (73), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 17:01:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-04-06 17:01:39,369 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 59 [2022-04-06 17:01:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:39,369 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-04-06 17:01:39,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 17:01:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-04-06 17:01:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 17:01:39,373 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:39,373 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:39,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:39,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:39,592 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:39,592 INFO L85 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 3 times [2022-04-06 17:01:39,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:39,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1516294996] [2022-04-06 17:01:39,600 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:39,600 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:39,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:39,601 INFO L85 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 4 times [2022-04-06 17:01:39,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:39,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55909328] [2022-04-06 17:01:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:39,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:39,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:39,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681217773] [2022-04-06 17:01:39,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 17:01:39,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:39,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:39,631 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) [2022-04-06 17:01:39,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 17:01:39,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 17:01:39,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:39,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 17:01:39,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 17:01:39,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:01:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 17:01:39,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:39,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55909328] [2022-04-06 17:01:39,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:39,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681217773] [2022-04-06 17:01:39,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681217773] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:01:39,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:01:39,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 17:01:39,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:39,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1516294996] [2022-04-06 17:01:39,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1516294996] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:39,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:39,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:01:39,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776767596] [2022-04-06 17:01:39,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:39,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:01:39,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:39,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:01:39,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 17:01:39,947 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 17:01:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:39,997 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2022-04-06 17:01:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 17:01:39,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2022-04-06 17:01:39,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:39,998 INFO L225 Difference]: With dead ends: 132 [2022-04-06 17:01:39,998 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 17:01:39,998 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-04-06 17:01:39,999 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 13 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:40,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 147 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:01:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 17:01:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-04-06 17:01:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.171875) internal successors, (75), 67 states have internal predecessors, (75), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 17:01:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2022-04-06 17:01:40,032 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 61 [2022-04-06 17:01:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:40,032 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2022-04-06 17:01:40,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 17:01:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2022-04-06 17:01:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 17:01:40,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:40,033 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:40,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:40,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 17:01:40,234 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2022-04-06 17:01:40,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:40,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [503928335] [2022-04-06 17:01:40,239 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:40,240 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:40,240 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 2 times [2022-04-06 17:01:40,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:40,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715649473] [2022-04-06 17:01:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:40,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:40,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:40,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880622248] [2022-04-06 17:01:40,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:01:40,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:40,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:40,249 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) [2022-04-06 17:01:40,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 17:01:40,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:01:40,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:40,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 17:01:40,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 17:01:40,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:01:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 17:01:40,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:40,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715649473] [2022-04-06 17:01:40,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:40,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880622248] [2022-04-06 17:01:40,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880622248] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:01:40,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:01:40,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-06 17:01:40,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:40,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [503928335] [2022-04-06 17:01:40,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [503928335] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:40,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:40,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 17:01:40,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203903131] [2022-04-06 17:01:40,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:40,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 17:01:40,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 17:01:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 17:01:40,640 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 17:01:40,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:40,726 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2022-04-06 17:01:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 17:01:40,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2022-04-06 17:01:40,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:40,728 INFO L225 Difference]: With dead ends: 151 [2022-04-06 17:01:40,728 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 17:01:40,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:01:40,729 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 33 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:40,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 168 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:01:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 17:01:40,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2022-04-06 17:01:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.160919540229885) internal successors, (101), 90 states have internal predecessors, (101), 28 states have call successors, (28), 19 states have call predecessors, (28), 17 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 17:01:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2022-04-06 17:01:40,744 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 68 [2022-04-06 17:01:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:40,744 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2022-04-06 17:01:40,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 17:01:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2022-04-06 17:01:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 17:01:40,745 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:40,746 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:40,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:40,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:40,967 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:40,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:40,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2022-04-06 17:01:40,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:40,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1992593498] [2022-04-06 17:01:40,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:40,972 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:40,972 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:40,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 2 times [2022-04-06 17:01:40,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:40,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363520902] [2022-04-06 17:01:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:40,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:40,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:40,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135178660] [2022-04-06 17:01:40,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:01:40,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:40,982 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) [2022-04-06 17:01:40,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 17:01:41,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:01:41,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:41,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 17:01:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 17:01:41,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:01:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 17:01:45,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:45,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363520902] [2022-04-06 17:01:45,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:45,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135178660] [2022-04-06 17:01:45,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135178660] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:01:45,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:01:45,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 17:01:45,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:45,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1992593498] [2022-04-06 17:01:45,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1992593498] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:45,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:45,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 17:01:45,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308776859] [2022-04-06 17:01:45,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:45,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 17:01:45,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 17:01:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 17:01:45,304 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 17:01:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:45,579 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2022-04-06 17:01:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 17:01:45,579 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), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2022-04-06 17:01:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:45,580 INFO L225 Difference]: With dead ends: 178 [2022-04-06 17:01:45,581 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 17:01:45,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-06 17:01:45,582 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 12 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:45,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 259 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 17:01:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 17:01:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-04-06 17:01:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 96 states have internal predecessors, (108), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 17:01:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 162 transitions. [2022-04-06 17:01:45,596 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 162 transitions. Word has length 68 [2022-04-06 17:01:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:45,597 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 162 transitions. [2022-04-06 17:01:45,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 17:01:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 162 transitions. [2022-04-06 17:01:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 17:01:45,597 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:45,598 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:45,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:45,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 17:01:45,822 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:45,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:45,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1390565976, now seen corresponding path program 3 times [2022-04-06 17:01:45,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:45,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [418784619] [2022-04-06 17:01:45,826 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:45,826 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:45,826 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1390565976, now seen corresponding path program 4 times [2022-04-06 17:01:45,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:45,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405874435] [2022-04-06 17:01:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:45,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:45,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:45,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695287203] [2022-04-06 17:01:45,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 17:01:45,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:45,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:45,835 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) [2022-04-06 17:01:45,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 17:01:45,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 17:01:45,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 17:01:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 17:01:46,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:01:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 17:01:49,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:49,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405874435] [2022-04-06 17:01:49,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:49,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695287203] [2022-04-06 17:01:49,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695287203] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:01:49,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:01:49,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 17:01:49,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:49,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [418784619] [2022-04-06 17:01:49,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [418784619] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:49,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:49,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 17:01:49,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551861928] [2022-04-06 17:01:49,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:49,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 17:01:49,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:49,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 17:01:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 17:01:49,321 INFO L87 Difference]: Start difference. First operand 141 states and 162 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 17:01:49,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:49,624 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2022-04-06 17:01:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 17:01:49,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2022-04-06 17:01:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:49,626 INFO L225 Difference]: With dead ends: 168 [2022-04-06 17:01:49,626 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 17:01:49,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 17:01:49,627 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 13 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:49,627 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 230 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 17:01:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 17:01:49,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-04-06 17:01:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 93 states have (on average 1.1290322580645162) internal successors, (105), 97 states have internal predecessors, (105), 29 states have call successors, (29), 21 states have call predecessors, (29), 20 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 17:01:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2022-04-06 17:01:49,641 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 73 [2022-04-06 17:01:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:49,641 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2022-04-06 17:01:49,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 17:01:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2022-04-06 17:01:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 17:01:49,642 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:49,642 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:49,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:49,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 17:01:49,855 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:49,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2022-04-06 17:01:49,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:49,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1072070130] [2022-04-06 17:01:49,859 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:49,860 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:49,860 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:49,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 2 times [2022-04-06 17:01:49,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:49,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467547519] [2022-04-06 17:01:49,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:49,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:49,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:49,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64484022] [2022-04-06 17:01:49,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:01:49,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:49,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:49,869 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) [2022-04-06 17:01:49,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 17:01:49,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:01:49,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 17:01:49,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:50,339 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 17:01:50,343 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 17:01:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 7 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-04-06 17:01:51,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:01:51,843 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 17:01:51,846 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 17:01:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-04-06 17:01:51,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:51,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467547519] [2022-04-06 17:01:51,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64484022] [2022-04-06 17:01:51,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64484022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:01:51,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:01:51,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 17:01:51,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1072070130] [2022-04-06 17:01:51,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1072070130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:51,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:51,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 17:01:51,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366350247] [2022-04-06 17:01:51,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:51,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 17:01:51,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:51,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 17:01:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-04-06 17:01:51,993 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand has 11 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 17:01:57,582 WARN L232 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 57 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 17:01:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:57,789 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2022-04-06 17:01:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 17:01:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 79 [2022-04-06 17:01:57,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:57,790 INFO L225 Difference]: With dead ends: 159 [2022-04-06 17:01:57,791 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 17:01:57,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-04-06 17:01:57,792 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 16 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:57,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 239 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 39 Unchecked, 0.6s Time] [2022-04-06 17:01:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 17:01:57,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2022-04-06 17:01:57,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.1625) internal successors, (93), 84 states have internal predecessors, (93), 27 states have call successors, (27), 18 states have call predecessors, (27), 17 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 17:01:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2022-04-06 17:01:57,808 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 79 [2022-04-06 17:01:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:57,808 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2022-04-06 17:01:57,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 17:01:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2022-04-06 17:01:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 17:01:57,811 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:57,811 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:57,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:58,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 17:01:58,021 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 816704307, now seen corresponding path program 5 times [2022-04-06 17:01:58,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:58,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1200680263] [2022-04-06 17:01:58,024 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:58,024 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:58,024 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash 816704307, now seen corresponding path program 6 times [2022-04-06 17:01:58,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:58,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199848921] [2022-04-06 17:01:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:58,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:58,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:58,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300609647] [2022-04-06 17:01:58,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 17:01:58,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:58,035 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) [2022-04-06 17:01:58,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 17:01:58,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 17:01:58,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 17:01:58,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 17:01:58,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:01:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 17:01:58,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:58,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199848921] [2022-04-06 17:01:58,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:58,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300609647] [2022-04-06 17:01:58,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300609647] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:01:58,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:01:58,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-06 17:01:58,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:58,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1200680263] [2022-04-06 17:01:58,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1200680263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:58,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:58,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 17:01:58,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357170109] [2022-04-06 17:01:58,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:58,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 17:01:58,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:58,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 17:01:58,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 17:01:58,468 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-04-06 17:01:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:58,538 INFO L93 Difference]: Finished difference Result 170 states and 207 transitions. [2022-04-06 17:01:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 17:01:58,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2022-04-06 17:01:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:58,540 INFO L225 Difference]: With dead ends: 170 [2022-04-06 17:01:58,540 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 17:01:58,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 17:01:58,541 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:58,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:01:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 17:01:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-04-06 17:01:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 86 states have internal predecessors, (95), 27 states have call successors, (27), 18 states have call predecessors, (27), 17 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 17:01:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2022-04-06 17:01:58,553 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 79 [2022-04-06 17:01:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:58,554 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2022-04-06 17:01:58,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-04-06 17:01:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2022-04-06 17:01:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 17:01:58,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:58,555 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:01:58,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:58,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 17:01:58,771 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:58,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1069895175, now seen corresponding path program 3 times [2022-04-06 17:01:58,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:58,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [85204849] [2022-04-06 17:01:58,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:58,775 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:58,775 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:58,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1069895175, now seen corresponding path program 4 times [2022-04-06 17:01:58,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:58,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502865281] [2022-04-06 17:01:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:58,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:58,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:58,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70383049] [2022-04-06 17:01:58,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 17:01:58,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:58,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:58,783 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) [2022-04-06 17:01:58,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 17:01:58,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 17:01:58,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:58,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 17:01:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:01:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 17:01:59,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:01:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 17:01:59,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:01:59,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502865281] [2022-04-06 17:01:59,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:01:59,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70383049] [2022-04-06 17:01:59,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70383049] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:01:59,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:01:59,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 17:01:59,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:01:59,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [85204849] [2022-04-06 17:01:59,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [85204849] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:01:59,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:01:59,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 17:01:59,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987106301] [2022-04-06 17:01:59,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:01:59,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 17:01:59,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 17:01:59,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 17:01:59,173 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 17:01:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:01:59,275 INFO L93 Difference]: Finished difference Result 179 states and 206 transitions. [2022-04-06 17:01:59,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 17:01:59,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 86 [2022-04-06 17:01:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:01:59,277 INFO L225 Difference]: With dead ends: 179 [2022-04-06 17:01:59,278 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 17:01:59,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 17:01:59,278 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 38 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:01:59,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 184 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:01:59,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 17:01:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2022-04-06 17:01:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 109 states have internal predecessors, (121), 34 states have call successors, (34), 23 states have call predecessors, (34), 21 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 17:01:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2022-04-06 17:01:59,296 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 86 [2022-04-06 17:01:59,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:01:59,297 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2022-04-06 17:01:59,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 17:01:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2022-04-06 17:01:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 17:01:59,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:01:59,299 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 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] [2022-04-06 17:01:59,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 17:01:59,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:59,511 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:01:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:01:59,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1068167297, now seen corresponding path program 5 times [2022-04-06 17:01:59,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:01:59,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289004224] [2022-04-06 17:01:59,515 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:01:59,515 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:01:59,515 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:01:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1068167297, now seen corresponding path program 6 times [2022-04-06 17:01:59,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:01:59,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507387965] [2022-04-06 17:01:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:01:59,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:01:59,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:01:59,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591824682] [2022-04-06 17:01:59,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 17:01:59,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:01:59,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:01:59,529 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) [2022-04-06 17:01:59,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 17:01:59,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 17:01:59,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:01:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 17:01:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:02:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 17:02:14,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:02:47,134 WARN L232 SmtUtils]: Spent 14.24s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 17:03:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 17:03:36,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:03:36,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507387965] [2022-04-06 17:03:36,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:03:36,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591824682] [2022-04-06 17:03:36,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591824682] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:03:36,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:03:36,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-04-06 17:03:36,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:03:36,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289004224] [2022-04-06 17:03:36,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289004224] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:03:36,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:03:36,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 17:03:36,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725920412] [2022-04-06 17:03:36,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:03:36,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 17:03:36,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:03:36,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 17:03:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=163, Unknown=1, NotChecked=0, Total=210 [2022-04-06 17:03:36,930 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 17:03:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:03:37,774 INFO L93 Difference]: Finished difference Result 200 states and 235 transitions. [2022-04-06 17:03:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 17:03:37,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 86 [2022-04-06 17:03:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:03:37,776 INFO L225 Difference]: With dead ends: 200 [2022-04-06 17:03:37,776 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 17:03:37,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2022-04-06 17:03:37,777 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 17:03:37,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 158 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 17:03:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 17:03:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2022-04-06 17:03:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 120 states have internal predecessors, (133), 36 states have call successors, (36), 23 states have call predecessors, (36), 22 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 17:03:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 203 transitions. [2022-04-06 17:03:37,821 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 203 transitions. Word has length 86 [2022-04-06 17:03:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:03:37,821 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 203 transitions. [2022-04-06 17:03:37,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 17:03:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 203 transitions. [2022-04-06 17:03:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 17:03:37,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:03:37,822 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:03:37,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 17:03:38,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 17:03:38,031 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:03:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:03:38,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1271087930, now seen corresponding path program 7 times [2022-04-06 17:03:38,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:03:38,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1511285016] [2022-04-06 17:03:38,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:03:38,035 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:03:38,035 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:03:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1271087930, now seen corresponding path program 8 times [2022-04-06 17:03:38,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:03:38,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344879675] [2022-04-06 17:03:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:03:38,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:03:38,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:03:38,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069542763] [2022-04-06 17:03:38,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:03:38,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:03:38,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:03:38,054 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) [2022-04-06 17:03:38,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 17:03:38,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:03:38,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:03:38,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 17:03:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:03:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 17:03:38,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:03:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-04-06 17:03:41,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:03:41,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344879675] [2022-04-06 17:03:41,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:03:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069542763] [2022-04-06 17:03:41,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069542763] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:03:41,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:03:41,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-04-06 17:03:41,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:03:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1511285016] [2022-04-06 17:03:41,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1511285016] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:03:41,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:03:41,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 17:03:41,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665716350] [2022-04-06 17:03:41,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:03:41,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 17:03:41,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:03:41,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 17:03:41,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-06 17:03:41,375 INFO L87 Difference]: Start difference. First operand 173 states and 203 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 17:03:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:03:41,983 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2022-04-06 17:03:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 17:03:41,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 91 [2022-04-06 17:03:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:03:41,985 INFO L225 Difference]: With dead ends: 257 [2022-04-06 17:03:41,985 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 17:03:41,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-04-06 17:03:41,986 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 42 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 17:03:41,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 341 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 17:03:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 17:03:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-04-06 17:03:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 134 states have (on average 1.171641791044776) internal successors, (157), 143 states have internal predecessors, (157), 45 states have call successors, (45), 26 states have call predecessors, (45), 25 states have return successors, (41), 35 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 17:03:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 243 transitions. [2022-04-06 17:03:42,006 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 243 transitions. Word has length 91 [2022-04-06 17:03:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:03:42,007 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 243 transitions. [2022-04-06 17:03:42,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 17:03:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 243 transitions. [2022-04-06 17:03:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 17:03:42,008 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:03:42,008 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:03:42,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 17:03:42,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:03:42,230 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:03:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:03:42,231 INFO L85 PathProgramCache]: Analyzing trace with hash 114996177, now seen corresponding path program 7 times [2022-04-06 17:03:42,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:03:42,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1637735347] [2022-04-06 17:03:42,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:03:42,237 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:03:42,237 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:03:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash 114996177, now seen corresponding path program 8 times [2022-04-06 17:03:42,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:03:42,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188920493] [2022-04-06 17:03:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:03:42,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:03:42,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:03:42,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41391754] [2022-04-06 17:03:42,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:03:42,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:03:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:03:42,248 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) [2022-04-06 17:03:42,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 17:03:42,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:03:42,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:03:42,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 17:03:42,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:03:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-04-06 17:03:42,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:03:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 17:03:42,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:03:42,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188920493] [2022-04-06 17:03:42,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:03:42,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41391754] [2022-04-06 17:03:42,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41391754] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:03:42,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:03:42,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 17:03:42,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:03:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1637735347] [2022-04-06 17:03:42,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1637735347] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:03:42,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:03:42,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 17:03:42,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71667389] [2022-04-06 17:03:42,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:03:42,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 17:03:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:03:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 17:03:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 17:03:42,629 INFO L87 Difference]: Start difference. First operand 205 states and 243 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 17:03:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:03:42,752 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2022-04-06 17:03:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 17:03:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2022-04-06 17:03:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:03:42,754 INFO L225 Difference]: With dead ends: 266 [2022-04-06 17:03:42,754 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 17:03:42,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-06 17:03:42,755 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 23 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:03:42,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 160 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:03:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 17:03:42,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-04-06 17:03:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 145 states have internal predecessors, (159), 45 states have call successors, (45), 26 states have call predecessors, (45), 25 states have return successors, (41), 35 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 17:03:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 245 transitions. [2022-04-06 17:03:42,775 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 245 transitions. Word has length 97 [2022-04-06 17:03:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:03:42,775 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 245 transitions. [2022-04-06 17:03:42,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 17:03:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 245 transitions. [2022-04-06 17:03:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 17:03:42,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:03:42,777 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-04-06 17:03:42,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 17:03:42,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:03:42,987 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:03:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:03:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash -545719131, now seen corresponding path program 5 times [2022-04-06 17:03:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:03:42,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1242342876] [2022-04-06 17:03:42,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:03:42,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:03:42,992 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:03:42,992 INFO L85 PathProgramCache]: Analyzing trace with hash -545719131, now seen corresponding path program 6 times [2022-04-06 17:03:42,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:03:42,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032548080] [2022-04-06 17:03:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:03:42,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:03:43,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:03:43,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315917814] [2022-04-06 17:03:43,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 17:03:43,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:03:43,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:03:43,007 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) [2022-04-06 17:03:43,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 17:03:43,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 17:03:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:03:43,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 17:03:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates...