/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/egcd3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 15:12:13,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 15:12:13,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 15:12:13,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 15:12:13,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 15:12:13,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 15:12:13,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 15:12:13,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 15:12:13,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 15:12:13,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 15:12:13,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 15:12:13,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 15:12:13,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 15:12:13,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 15:12:13,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 15:12:13,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 15:12:13,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 15:12:13,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 15:12:13,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 15:12:13,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 15:12:13,877 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 15:12:13,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 15:12:13,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 15:12:13,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 15:12:13,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 15:12:13,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 15:12:13,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 15:12:13,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 15:12:13,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 15:12:13,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 15:12:13,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 15:12:13,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 15:12:13,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 15:12:13,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 15:12:13,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 15:12:13,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 15:12:13,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 15:12:13,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 15:12:13,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 15:12:13,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 15:12:13,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 15:12:13,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 15:12:13,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 15:12:13,906 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 15:12:13,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 15:12:13,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 15:12:13,907 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 15:12:13,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 15:12:13,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 15:12:13,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 15:12:13,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 15:12:13,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 15:12:13,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 15:12:13,908 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 15:12:13,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 15:12:13,908 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 15:12:13,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 15:12:13,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 15:12:13,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 15:12:13,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 15:12:13,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 15:12:13,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:12:13,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 15:12:13,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 15:12:13,909 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 15:12:13,909 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 15:12:13,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 15:12:13,909 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 15:12:13,909 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 15:12:14,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 15:12:14,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 15:12:14,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 15:12:14,115 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 15:12:14,116 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 15:12:14,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-03-20 15:12:14,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa8a7c20/3822f0990e3a41b49bbbd566dbb561dd/FLAG0e3f36b8b [2022-03-20 15:12:14,518 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 15:12:14,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-03-20 15:12:14,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa8a7c20/3822f0990e3a41b49bbbd566dbb561dd/FLAG0e3f36b8b [2022-03-20 15:12:14,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa8a7c20/3822f0990e3a41b49bbbd566dbb561dd [2022-03-20 15:12:14,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 15:12:14,539 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 15:12:14,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 15:12:14,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 15:12:14,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 15:12:14,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:12:14" (1/1) ... [2022-03-20 15:12:14,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6675d253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14, skipping insertion in model container [2022-03-20 15:12:14,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:12:14" (1/1) ... [2022-03-20 15:12:14,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 15:12:14,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 15:12:14,713 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/egcd3-ll_valuebound50.c[490,503] [2022-03-20 15:12:14,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:12:14,739 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 15:12:14,750 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/egcd3-ll_valuebound50.c[490,503] [2022-03-20 15:12:14,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:12:14,771 INFO L208 MainTranslator]: Completed translation [2022-03-20 15:12:14,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14 WrapperNode [2022-03-20 15:12:14,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 15:12:14,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 15:12:14,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 15:12:14,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 15:12:14,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14" (1/1) ... [2022-03-20 15:12:14,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14" (1/1) ... [2022-03-20 15:12:14,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14" (1/1) ... [2022-03-20 15:12:14,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14" (1/1) ... [2022-03-20 15:12:14,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14" (1/1) ... [2022-03-20 15:12:14,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14" (1/1) ... [2022-03-20 15:12:14,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14" (1/1) ... [2022-03-20 15:12:14,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 15:12:14,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 15:12:14,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 15:12:14,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 15:12:14,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14" (1/1) ... [2022-03-20 15:12:14,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:12:14,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:14,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 15:12:14,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 15:12:14,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 15:12:14,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 15:12:14,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 15:12:14,856 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 15:12:14,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 15:12:14,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 15:12:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 15:12:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 15:12:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 15:12:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 15:12:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 15:12:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 15:12:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 15:12:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 15:12:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 15:12:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 15:12:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 15:12:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 15:12:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 15:12:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 15:12:14,909 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 15:12:14,910 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 15:12:15,013 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 15:12:15,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 15:12:15,017 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 15:12:15,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:12:15 BoogieIcfgContainer [2022-03-20 15:12:15,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 15:12:15,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 15:12:15,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 15:12:15,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 15:12:15,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:12:14" (1/3) ... [2022-03-20 15:12:15,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30f8255c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:12:15, skipping insertion in model container [2022-03-20 15:12:15,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:12:14" (2/3) ... [2022-03-20 15:12:15,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30f8255c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:12:15, skipping insertion in model container [2022-03-20 15:12:15,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:12:15" (3/3) ... [2022-03-20 15:12:15,038 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2022-03-20 15:12:15,041 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 15:12:15,041 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 15:12:15,093 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 15:12:15,097 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 [2022-03-20 15:12:15,097 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 15:12:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 15:12:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 15:12:15,115 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:15,115 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:15,116 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-03-20 15:12:15,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:15,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [897695411] [2022-03-20 15:12:15,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:15,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 2 times [2022-03-20 15:12:15,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:15,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455280352] [2022-03-20 15:12:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:15,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:12:15,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:12:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:12:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:12:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:12:15,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:12:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:12:15,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:12:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:12:15,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 15:12:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:12:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:12:15,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:15,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455280352] [2022-03-20 15:12:15,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455280352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:15,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:15,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:12:15,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:15,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [897695411] [2022-03-20 15:12:15,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [897695411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:15,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:15,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:12:15,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171841175] [2022-03-20 15:12:15,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:15,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 15:12:15,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:15,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 15:12:15,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:12:15,339 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:12:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:15,395 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-20 15:12:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 15:12:15,396 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 15:12:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:15,401 INFO L225 Difference]: With dead ends: 73 [2022-03-20 15:12:15,401 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 15:12:15,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:12:15,405 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:15,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:12:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 15:12:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 15:12:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 15:12:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 15:12:15,432 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-20 15:12:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:15,432 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 15:12:15,432 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:12:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 15:12:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 15:12:15,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:15,433 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:15,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 15:12:15,434 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:15,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-03-20 15:12:15,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:15,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1419552] [2022-03-20 15:12:15,435 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 2 times [2022-03-20 15:12:15,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:15,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067925299] [2022-03-20 15:12:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:15,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:15,465 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:15,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125098382] [2022-03-20 15:12:15,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:15,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:15,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:15,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:15,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 15:12:15,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:12:15,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:15,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:12:15,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:12:15,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:12:15,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:15,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067925299] [2022-03-20 15:12:15,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:15,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125098382] [2022-03-20 15:12:15,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125098382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:15,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:15,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:12:15,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:15,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1419552] [2022-03-20 15:12:15,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1419552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:15,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:15,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:12:15,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080473796] [2022-03-20 15:12:15,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:15,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:12:15,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:15,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:12:15,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:12:15,757 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 15:12:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:15,846 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 15:12:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:12:15,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 15:12:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:15,849 INFO L225 Difference]: With dead ends: 54 [2022-03-20 15:12:15,849 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 15:12:15,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:12:15,852 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:15,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:12:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 15:12:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 15:12:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 15:12:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 15:12:15,870 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2022-03-20 15:12:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:15,871 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 15:12:15,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 15:12:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 15:12:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 15:12:15,872 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:15,872 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-03-20 15:12:15,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:16,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:16,088 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-03-20 15:12:16,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:16,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [870492560] [2022-03-20 15:12:16,089 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:16,089 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 2 times [2022-03-20 15:12:16,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:16,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35634701] [2022-03-20 15:12:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:16,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:16,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:16,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122066622] [2022-03-20 15:12:16,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:16,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:16,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:16,109 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:16,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 15:12:16,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:16,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:16,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:12:16,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 15:12:16,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 15:12:16,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:16,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35634701] [2022-03-20 15:12:16,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:16,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122066622] [2022-03-20 15:12:16,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122066622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:12:16,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:12:16,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 15:12:16,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:16,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [870492560] [2022-03-20 15:12:16,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [870492560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:16,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:16,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:12:16,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345385366] [2022-03-20 15:12:16,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:16,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:12:16,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:16,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:12:16,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 15:12:16,356 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:12:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:16,482 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-20 15:12:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:12:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 15:12:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:16,484 INFO L225 Difference]: With dead ends: 103 [2022-03-20 15:12:16,484 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 15:12:16,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:12:16,485 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:16,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 288 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:12:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 15:12:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-20 15:12:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 15:12:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-20 15:12:16,514 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-20 15:12:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:16,515 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-20 15:12:16,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:12:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-20 15:12:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 15:12:16,517 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:16,517 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:16,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:16,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 15:12:16,728 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-03-20 15:12:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:16,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [384015640] [2022-03-20 15:12:16,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:16,729 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 2 times [2022-03-20 15:12:16,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:16,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373862046] [2022-03-20 15:12:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:16,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:16,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:16,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685341620] [2022-03-20 15:12:16,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:16,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:16,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:16,745 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:16,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 15:12:16,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:16,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:16,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 15:12:16,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:12:17,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:12:17,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:17,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373862046] [2022-03-20 15:12:17,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:17,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685341620] [2022-03-20 15:12:17,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685341620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:12:17,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:12:17,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-03-20 15:12:17,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:17,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [384015640] [2022-03-20 15:12:17,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [384015640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:17,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:17,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:12:17,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684251744] [2022-03-20 15:12:17,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:17,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:12:17,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:12:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:12:17,291 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 15:12:17,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:17,589 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2022-03-20 15:12:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 15:12:17,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-03-20 15:12:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:17,590 INFO L225 Difference]: With dead ends: 112 [2022-03-20 15:12:17,590 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 15:12:17,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:12:17,591 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:17,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 389 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:12:17,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 15:12:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-03-20 15:12:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 15:12:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-03-20 15:12:17,622 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2022-03-20 15:12:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:17,623 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-03-20 15:12:17,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 15:12:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-03-20 15:12:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 15:12:17,626 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:17,626 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:17,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:17,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:17,839 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:17,840 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-03-20 15:12:17,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:17,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1226134640] [2022-03-20 15:12:17,840 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:17,840 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 2 times [2022-03-20 15:12:17,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:17,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566642980] [2022-03-20 15:12:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:17,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:17,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:17,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949617689] [2022-03-20 15:12:17,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:17,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:17,852 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:17,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 15:12:17,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:17,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:17,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 15:12:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 15:12:18,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 15:12:18,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:18,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566642980] [2022-03-20 15:12:18,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:18,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949617689] [2022-03-20 15:12:18,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949617689] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:12:18,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:12:18,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 15:12:18,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:18,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1226134640] [2022-03-20 15:12:18,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1226134640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:18,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:18,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:12:18,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156993912] [2022-03-20 15:12:18,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:18,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:12:18,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:12:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:12:18,119 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:12:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:18,159 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2022-03-20 15:12:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:12:18,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-20 15:12:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:18,161 INFO L225 Difference]: With dead ends: 130 [2022-03-20 15:12:18,161 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 15:12:18,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:12:18,162 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:18,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:12:18,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 15:12:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-03-20 15:12:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 76 states have (on average 1.263157894736842) internal successors, (96), 77 states have internal predecessors, (96), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 15:12:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2022-03-20 15:12:18,188 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 47 [2022-03-20 15:12:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:18,188 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2022-03-20 15:12:18,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:12:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2022-03-20 15:12:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 15:12:18,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:18,191 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:18,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 15:12:18,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:18,404 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:18,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-03-20 15:12:18,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:18,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1894829934] [2022-03-20 15:12:18,405 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:18,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 2 times [2022-03-20 15:12:18,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:18,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015458196] [2022-03-20 15:12:18,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:18,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:18,414 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:18,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338729752] [2022-03-20 15:12:18,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:18,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:18,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:18,418 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:18,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 15:12:18,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:18,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:18,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 15:12:18,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:12:18,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:12:18,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015458196] [2022-03-20 15:12:18,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338729752] [2022-03-20 15:12:18,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338729752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:12:18,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:12:18,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-20 15:12:18,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1894829934] [2022-03-20 15:12:18,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1894829934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:18,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:18,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:12:18,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113708603] [2022-03-20 15:12:18,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:18,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:12:18,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:18,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:12:18,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:12:18,838 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 15:12:18,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:18,994 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2022-03-20 15:12:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:12:18,995 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-03-20 15:12:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:18,996 INFO L225 Difference]: With dead ends: 137 [2022-03-20 15:12:18,996 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 15:12:18,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:12:18,996 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 87 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:18,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 254 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:12:18,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 15:12:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-03-20 15:12:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 83 states have internal predecessors, (102), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 15:12:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-03-20 15:12:19,020 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 47 [2022-03-20 15:12:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:19,020 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-03-20 15:12:19,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 15:12:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-03-20 15:12:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 15:12:19,021 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:19,021 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:19,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:19,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:19,235 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:19,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:19,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 3 times [2022-03-20 15:12:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:19,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056452005] [2022-03-20 15:12:19,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:19,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 4 times [2022-03-20 15:12:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:19,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716723468] [2022-03-20 15:12:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:19,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:19,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910424319] [2022-03-20 15:12:19,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:12:19,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:19,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:19,246 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:19,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 15:12:19,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:12:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 15:12:19,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:12:19,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:12:19,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:19,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716723468] [2022-03-20 15:12:19,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:19,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910424319] [2022-03-20 15:12:19,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910424319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:19,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:19,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:12:19,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:19,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056452005] [2022-03-20 15:12:19,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056452005] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:19,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:19,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:12:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852452730] [2022-03-20 15:12:19,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:19,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:12:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:12:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:12:19,338 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 15:12:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:19,390 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2022-03-20 15:12:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:12:19,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-20 15:12:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:19,391 INFO L225 Difference]: With dead ends: 170 [2022-03-20 15:12:19,391 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 15:12:19,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 15:12:19,392 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:19,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:12:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 15:12:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-03-20 15:12:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 15:12:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-03-20 15:12:19,404 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 47 [2022-03-20 15:12:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:19,404 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-03-20 15:12:19,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 15:12:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-03-20 15:12:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 15:12:19,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:19,405 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:19,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:19,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:19,619 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:19,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-03-20 15:12:19,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:19,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882396629] [2022-03-20 15:12:19,620 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:19,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 2 times [2022-03-20 15:12:19,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:19,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776152377] [2022-03-20 15:12:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:19,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:19,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:19,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987174655] [2022-03-20 15:12:19,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:19,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:19,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:19,630 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:19,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 15:12:19,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:19,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:19,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:12:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 15:12:19,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:12:19,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:19,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776152377] [2022-03-20 15:12:19,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:19,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987174655] [2022-03-20 15:12:19,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987174655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:19,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:19,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:12:19,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:19,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882396629] [2022-03-20 15:12:19,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882396629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:19,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:19,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:12:19,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964303731] [2022-03-20 15:12:19,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:19,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:12:19,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:19,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:12:19,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:12:19,738 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 15:12:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:19,790 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2022-03-20 15:12:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:12:19,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-20 15:12:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:19,792 INFO L225 Difference]: With dead ends: 158 [2022-03-20 15:12:19,792 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 15:12:19,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:12:19,793 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:19,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:12:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 15:12:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2022-03-20 15:12:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 74 states have (on average 1.162162162162162) internal successors, (86), 81 states have internal predecessors, (86), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 15:12:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2022-03-20 15:12:19,816 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 52 [2022-03-20 15:12:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:19,817 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2022-03-20 15:12:19,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 15:12:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2022-03-20 15:12:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 15:12:19,819 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:19,819 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:19,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:20,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:20,027 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:20,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-03-20 15:12:20,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:20,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [744206630] [2022-03-20 15:12:20,028 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:20,029 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 2 times [2022-03-20 15:12:20,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:20,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113419610] [2022-03-20 15:12:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:20,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:20,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:20,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829562771] [2022-03-20 15:12:20,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:20,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:20,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:20,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:20,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 15:12:20,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:20,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:20,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 15:12:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 15:12:20,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 15:12:21,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:21,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113419610] [2022-03-20 15:12:21,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:21,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829562771] [2022-03-20 15:12:21,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829562771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:12:21,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:12:21,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 15:12:21,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:21,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [744206630] [2022-03-20 15:12:21,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [744206630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:21,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:21,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:12:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577385374] [2022-03-20 15:12:21,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:21,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:12:21,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:21,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:12:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:12:21,193 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 15:12:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:21,532 INFO L93 Difference]: Finished difference Result 200 states and 283 transitions. [2022-03-20 15:12:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:12:21,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-03-20 15:12:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:21,535 INFO L225 Difference]: With dead ends: 200 [2022-03-20 15:12:21,535 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 15:12:21,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:12:21,536 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:21,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 423 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:12:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 15:12:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-03-20 15:12:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 110 states have internal predecessors, (119), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 69 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 15:12:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2022-03-20 15:12:21,571 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 64 [2022-03-20 15:12:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:21,571 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2022-03-20 15:12:21,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 15:12:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2022-03-20 15:12:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 15:12:21,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:21,572 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:21,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:21,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 15:12:21,789 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 3 times [2022-03-20 15:12:21,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:21,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306223426] [2022-03-20 15:12:21,790 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:21,790 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 4 times [2022-03-20 15:12:21,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:21,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108517250] [2022-03-20 15:12:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:21,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:21,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087615791] [2022-03-20 15:12:21,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:12:21,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:21,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:21,798 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:21,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 15:12:21,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:12:21,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:21,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 15:12:21,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 15:12:21,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 15:12:22,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:22,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108517250] [2022-03-20 15:12:22,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:22,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087615791] [2022-03-20 15:12:22,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087615791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:12:22,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:12:22,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-20 15:12:22,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:22,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306223426] [2022-03-20 15:12:22,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306223426] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:22,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:22,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:12:22,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576497271] [2022-03-20 15:12:22,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:22,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:12:22,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:22,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:12:22,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:12:22,023 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:12:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:22,271 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2022-03-20 15:12:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:12:22,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2022-03-20 15:12:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:22,274 INFO L225 Difference]: With dead ends: 288 [2022-03-20 15:12:22,274 INFO L226 Difference]: Without dead ends: 281 [2022-03-20 15:12:22,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-03-20 15:12:22,274 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 46 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:22,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:12:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-20 15:12:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2022-03-20 15:12:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.206896551724138) internal successors, (140), 122 states have internal predecessors, (140), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 15:12:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 296 transitions. [2022-03-20 15:12:22,299 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 296 transitions. Word has length 69 [2022-03-20 15:12:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:22,299 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 296 transitions. [2022-03-20 15:12:22,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:12:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 296 transitions. [2022-03-20 15:12:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 15:12:22,300 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:22,300 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-03-20 15:12:22,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:22,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 15:12:22,515 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-03-20 15:12:22,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:22,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [436563609] [2022-03-20 15:12:22,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 2 times [2022-03-20 15:12:22,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:22,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813097749] [2022-03-20 15:12:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:22,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:22,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:22,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148566458] [2022-03-20 15:12:22,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:22,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:22,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:22,525 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:22,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 15:12:22,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:22,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:12:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 15:12:22,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-20 15:12:22,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:22,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813097749] [2022-03-20 15:12:22,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:22,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148566458] [2022-03-20 15:12:22,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148566458] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:12:22,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:12:22,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 15:12:22,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [436563609] [2022-03-20 15:12:22,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [436563609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:22,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:22,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:12:22,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131758740] [2022-03-20 15:12:22,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:22,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:12:22,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:12:22,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 15:12:22,822 INFO L87 Difference]: Start difference. First operand 208 states and 296 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:12:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:22,877 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-03-20 15:12:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:12:22,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-03-20 15:12:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:22,879 INFO L225 Difference]: With dead ends: 214 [2022-03-20 15:12:22,879 INFO L226 Difference]: Without dead ends: 212 [2022-03-20 15:12:22,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:12:22,880 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:22,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 145 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:12:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-20 15:12:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-20 15:12:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 125 states have internal predecessors, (143), 79 states have call successors, (79), 14 states have call predecessors, (79), 13 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 15:12:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 299 transitions. [2022-03-20 15:12:22,911 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 299 transitions. Word has length 74 [2022-03-20 15:12:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:22,911 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 299 transitions. [2022-03-20 15:12:22,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:12:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 299 transitions. [2022-03-20 15:12:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 15:12:22,912 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:22,912 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:22,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:23,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 15:12:23,124 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:23,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-03-20 15:12:23,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:23,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807302102] [2022-03-20 15:12:23,124 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:23,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 2 times [2022-03-20 15:12:23,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:23,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064757647] [2022-03-20 15:12:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:23,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:23,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:23,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452897901] [2022-03-20 15:12:23,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:23,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:23,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:23,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:23,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 15:12:23,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:23,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:23,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 15:12:23,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 15:12:23,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 15:12:23,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064757647] [2022-03-20 15:12:23,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452897901] [2022-03-20 15:12:23,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452897901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:12:23,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:12:23,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 15:12:23,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:23,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807302102] [2022-03-20 15:12:23,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807302102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:23,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:23,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:12:23,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920230099] [2022-03-20 15:12:23,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:23,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:12:23,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:12:23,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 15:12:23,422 INFO L87 Difference]: Start difference. First operand 212 states and 299 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:12:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:23,620 INFO L93 Difference]: Finished difference Result 226 states and 310 transitions. [2022-03-20 15:12:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:12:23,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-03-20 15:12:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:23,622 INFO L225 Difference]: With dead ends: 226 [2022-03-20 15:12:23,623 INFO L226 Difference]: Without dead ends: 224 [2022-03-20 15:12:23,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:12:23,623 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:23,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:12:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-20 15:12:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-03-20 15:12:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 128 states have (on average 1.1875) internal successors, (152), 134 states have internal predecessors, (152), 79 states have call successors, (79), 17 states have call predecessors, (79), 16 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 15:12:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-03-20 15:12:23,663 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 72 [2022-03-20 15:12:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:23,663 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-03-20 15:12:23,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:12:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-03-20 15:12:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 15:12:23,664 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:23,664 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:23,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:23,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 15:12:23,873 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:23,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 3 times [2022-03-20 15:12:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:23,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1330421458] [2022-03-20 15:12:23,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 4 times [2022-03-20 15:12:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:23,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788707779] [2022-03-20 15:12:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:23,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:23,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:23,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790884082] [2022-03-20 15:12:23,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:12:23,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:23,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:23,882 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:23,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 15:12:23,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:12:23,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:23,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 15:12:23,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 15:12:24,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:12:24,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788707779] [2022-03-20 15:12:24,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790884082] [2022-03-20 15:12:24,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790884082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:24,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:24,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:12:24,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:24,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1330421458] [2022-03-20 15:12:24,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1330421458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:24,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:24,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:12:24,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212842227] [2022-03-20 15:12:24,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:24,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:12:24,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:12:24,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:12:24,018 INFO L87 Difference]: Start difference. First operand 224 states and 308 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 15:12:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:24,092 INFO L93 Difference]: Finished difference Result 367 states and 500 transitions. [2022-03-20 15:12:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:12:24,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-20 15:12:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:24,094 INFO L225 Difference]: With dead ends: 367 [2022-03-20 15:12:24,094 INFO L226 Difference]: Without dead ends: 230 [2022-03-20 15:12:24,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:12:24,095 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:24,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:12:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-20 15:12:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2022-03-20 15:12:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 127 states have internal predecessors, (149), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 15:12:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 289 transitions. [2022-03-20 15:12:24,129 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 289 transitions. Word has length 77 [2022-03-20 15:12:24,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:24,129 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 289 transitions. [2022-03-20 15:12:24,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 15:12:24,129 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 289 transitions. [2022-03-20 15:12:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 15:12:24,130 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:24,130 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:24,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:24,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 15:12:24,358 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 5 times [2022-03-20 15:12:24,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:24,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1966501210] [2022-03-20 15:12:24,359 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 6 times [2022-03-20 15:12:24,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:24,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229320943] [2022-03-20 15:12:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:24,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:24,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592377397] [2022-03-20 15:12:24,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:12:24,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:24,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:24,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:24,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 15:12:24,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:12:24,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:24,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 15:12:24,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 15:12:25,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:25,457 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:12:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 15:12:25,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:25,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229320943] [2022-03-20 15:12:25,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:25,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592377397] [2022-03-20 15:12:25,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592377397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:12:25,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:12:25,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2022-03-20 15:12:25,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:25,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1966501210] [2022-03-20 15:12:25,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1966501210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:25,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:25,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:12:25,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114385697] [2022-03-20 15:12:25,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:25,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:12:25,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:25,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:12:25,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:12:25,520 INFO L87 Difference]: Start difference. First operand 214 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 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) [2022-03-20 15:12:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:25,995 INFO L93 Difference]: Finished difference Result 285 states and 377 transitions. [2022-03-20 15:12:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 15:12:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 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 77 [2022-03-20 15:12:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:25,997 INFO L225 Difference]: With dead ends: 285 [2022-03-20 15:12:25,997 INFO L226 Difference]: Without dead ends: 283 [2022-03-20 15:12:25,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-20 15:12:25,997 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 59 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:25,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 536 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:12:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-20 15:12:26,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 265. [2022-03-20 15:12:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 157 states have (on average 1.178343949044586) internal successors, (185), 158 states have internal predecessors, (185), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-20 15:12:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2022-03-20 15:12:26,032 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 77 [2022-03-20 15:12:26,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:26,032 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2022-03-20 15:12:26,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 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) [2022-03-20 15:12:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2022-03-20 15:12:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 15:12:26,033 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:26,033 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-03-20 15:12:26,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:26,248 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 15:12:26,249 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2022-03-20 15:12:26,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:26,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153366784] [2022-03-20 15:12:26,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 2 times [2022-03-20 15:12:26,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:26,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346904787] [2022-03-20 15:12:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:26,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:26,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797455998] [2022-03-20 15:12:26,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:26,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:26,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:26,257 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:26,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 15:12:26,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:26,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:26,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 15:12:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 15:12:26,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 15:12:28,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346904787] [2022-03-20 15:12:28,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797455998] [2022-03-20 15:12:28,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797455998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:12:28,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:12:28,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-20 15:12:28,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:28,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153366784] [2022-03-20 15:12:28,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153366784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:28,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:28,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:12:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429044498] [2022-03-20 15:12:28,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:28,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:12:28,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:12:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:12:28,608 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 15:12:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:29,158 INFO L93 Difference]: Finished difference Result 348 states and 475 transitions. [2022-03-20 15:12:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:12:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-03-20 15:12:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:29,160 INFO L225 Difference]: With dead ends: 348 [2022-03-20 15:12:29,160 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 15:12:29,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:12:29,160 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:29,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 437 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 15:12:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 15:12:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 330. [2022-03-20 15:12:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 191 states have (on average 1.193717277486911) internal successors, (228), 192 states have internal predecessors, (228), 115 states have call successors, (115), 24 states have call predecessors, (115), 23 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-03-20 15:12:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 456 transitions. [2022-03-20 15:12:29,205 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 456 transitions. Word has length 86 [2022-03-20 15:12:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:29,205 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 456 transitions. [2022-03-20 15:12:29,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 15:12:29,206 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 456 transitions. [2022-03-20 15:12:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 15:12:29,206 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:29,206 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1] [2022-03-20 15:12:29,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:29,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:29,410 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:29,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 3 times [2022-03-20 15:12:29,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:29,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [901678003] [2022-03-20 15:12:29,411 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 4 times [2022-03-20 15:12:29,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:29,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951930415] [2022-03-20 15:12:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:29,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:29,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:29,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596106226] [2022-03-20 15:12:29,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:12:29,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:29,420 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:29,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 15:12:29,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:12:29,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 15:12:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:30,271 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:12:30,274 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:12:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 15:12:42,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:44,247 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:12:44,250 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:12:48,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:48,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951930415] [2022-03-20 15:12:48,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:48,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596106226] [2022-03-20 15:12:48,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596106226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:12:48,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:12:48,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 15:12:48,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:48,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [901678003] [2022-03-20 15:12:48,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [901678003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:48,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:48,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:12:48,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003070913] [2022-03-20 15:12:48,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:48,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:12:48,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:12:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=594, Unknown=1, NotChecked=0, Total=702 [2022-03-20 15:12:48,840 INFO L87 Difference]: Start difference. First operand 330 states and 456 transitions. Second operand has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 15:12:49,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:49,618 INFO L93 Difference]: Finished difference Result 377 states and 518 transitions. [2022-03-20 15:12:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:12:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2022-03-20 15:12:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:49,620 INFO L225 Difference]: With dead ends: 377 [2022-03-20 15:12:49,620 INFO L226 Difference]: Without dead ends: 374 [2022-03-20 15:12:49,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=166, Invalid=889, Unknown=1, NotChecked=0, Total=1056 [2022-03-20 15:12:49,621 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 57 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:49,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 587 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 615 Invalid, 0 Unknown, 133 Unchecked, 0.5s Time] [2022-03-20 15:12:49,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-03-20 15:12:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 359. [2022-03-20 15:12:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 206 states have (on average 1.1990291262135921) internal successors, (247), 207 states have internal predecessors, (247), 127 states have call successors, (127), 26 states have call predecessors, (127), 25 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 15:12:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 499 transitions. [2022-03-20 15:12:49,670 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 499 transitions. Word has length 91 [2022-03-20 15:12:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:49,671 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 499 transitions. [2022-03-20 15:12:49,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 15:12:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 499 transitions. [2022-03-20 15:12:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 15:12:49,673 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:49,673 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-03-20 15:12:49,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:49,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 15:12:49,886 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1983923522, now seen corresponding path program 1 times [2022-03-20 15:12:49,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:49,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1331483795] [2022-03-20 15:12:49,887 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1983923522, now seen corresponding path program 2 times [2022-03-20 15:12:49,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:49,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634427653] [2022-03-20 15:12:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:49,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:49,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:49,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482574435] [2022-03-20 15:12:49,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:49,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:49,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:49,895 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:49,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 15:12:49,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:49,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 15:12:49,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 64 proven. 45 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 15:12:50,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:12:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 80 proven. 19 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 15:12:55,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:12:55,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634427653] [2022-03-20 15:12:55,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:12:55,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482574435] [2022-03-20 15:12:55,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482574435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:12:55,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:12:55,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-20 15:12:55,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:12:55,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1331483795] [2022-03-20 15:12:55,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1331483795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:12:55,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:12:55,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:12:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494176341] [2022-03-20 15:12:55,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:12:55,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:12:55,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:12:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:12:55,719 INFO L87 Difference]: Start difference. First operand 359 states and 499 transitions. Second operand has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:12:58,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:12:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:12:58,378 INFO L93 Difference]: Finished difference Result 425 states and 583 transitions. [2022-03-20 15:12:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:12:58,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 99 [2022-03-20 15:12:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:12:58,380 INFO L225 Difference]: With dead ends: 425 [2022-03-20 15:12:58,380 INFO L226 Difference]: Without dead ends: 423 [2022-03-20 15:12:58,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:12:58,381 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 67 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:12:58,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 693 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 936 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 15:12:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-20 15:12:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 363. [2022-03-20 15:12:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 209 states have (on average 1.1961722488038278) internal successors, (250), 210 states have internal predecessors, (250), 127 states have call successors, (127), 27 states have call predecessors, (127), 26 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 15:12:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 502 transitions. [2022-03-20 15:12:58,449 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 502 transitions. Word has length 99 [2022-03-20 15:12:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:12:58,449 INFO L478 AbstractCegarLoop]: Abstraction has 363 states and 502 transitions. [2022-03-20 15:12:58,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:12:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 502 transitions. [2022-03-20 15:12:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 15:12:58,450 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:12:58,450 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 15:12:58,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 15:12:58,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 15:12:58,666 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:12:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:12:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 7 times [2022-03-20 15:12:58,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:12:58,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [12162709] [2022-03-20 15:12:58,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:12:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 8 times [2022-03-20 15:12:58,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:12:58,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599680555] [2022-03-20 15:12:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:12:58,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:12:58,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:12:58,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375383416] [2022-03-20 15:12:58,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:12:58,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:12:58,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:12:58,679 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:12:58,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 15:12:58,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:12:58,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:12:58,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 15:12:58,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:12:59,383 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:12:59,385 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:13:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 26 proven. 92 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-20 15:13:00,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:13:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 69 proven. 27 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-20 15:13:00,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:13:00,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599680555] [2022-03-20 15:13:00,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:13:00,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375383416] [2022-03-20 15:13:00,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375383416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:13:00,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:13:00,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-20 15:13:00,926 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:13:00,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [12162709] [2022-03-20 15:13:00,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [12162709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:13:00,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:13:00,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 15:13:00,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795336214] [2022-03-20 15:13:00,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:13:00,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 15:13:00,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:13:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 15:13:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-20 15:13:00,927 INFO L87 Difference]: Start difference. First operand 363 states and 502 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 15:13:02,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:13:02,972 INFO L93 Difference]: Finished difference Result 470 states and 646 transitions. [2022-03-20 15:13:02,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:13:02,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 102 [2022-03-20 15:13:02,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:13:02,974 INFO L225 Difference]: With dead ends: 470 [2022-03-20 15:13:02,974 INFO L226 Difference]: Without dead ends: 468 [2022-03-20 15:13:02,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-03-20 15:13:02,975 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 66 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:13:02,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 629 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 15:13:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-03-20 15:13:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 407. [2022-03-20 15:13:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 234 states have (on average 1.1965811965811965) internal successors, (280), 235 states have internal predecessors, (280), 143 states have call successors, (143), 30 states have call predecessors, (143), 29 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2022-03-20 15:13:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 564 transitions. [2022-03-20 15:13:03,045 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 564 transitions. Word has length 102 [2022-03-20 15:13:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:13:03,046 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 564 transitions. [2022-03-20 15:13:03,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 15:13:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 564 transitions. [2022-03-20 15:13:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 15:13:03,047 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:13:03,047 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:13:03,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 15:13:03,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 15:13:03,264 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:13:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:13:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 5 times [2022-03-20 15:13:03,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:13:03,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [805202680] [2022-03-20 15:13:03,264 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:13:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 6 times [2022-03-20 15:13:03,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:13:03,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834017347] [2022-03-20 15:13:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:13:03,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:13:03,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:13:03,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851670761] [2022-03-20 15:13:03,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:13:03,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:13:03,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:13:03,275 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:13:03,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 15:13:03,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:13:03,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:13:03,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 15:13:03,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:13:03,906 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:13:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 15:13:04,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:13:04,176 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:13:46,968 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:13:55,225 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 61 proven. 35 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-03-20 15:14:06,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:14:06,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834017347] [2022-03-20 15:14:06,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:14:06,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851670761] [2022-03-20 15:14:06,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851670761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:14:06,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:14:06,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-20 15:14:06,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:14:06,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [805202680] [2022-03-20 15:14:06,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [805202680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:14:06,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:14:06,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:14:06,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195592173] [2022-03-20 15:14:06,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:14:06,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:14:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:14:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:14:06,946 INFO L87 Difference]: Start difference. First operand 407 states and 564 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 15:14:07,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:14:07,417 INFO L93 Difference]: Finished difference Result 495 states and 680 transitions. [2022-03-20 15:14:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:14:07,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-03-20 15:14:07,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:14:07,420 INFO L225 Difference]: With dead ends: 495 [2022-03-20 15:14:07,420 INFO L226 Difference]: Without dead ends: 492 [2022-03-20 15:14:07,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:14:07,421 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 48 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:14:07,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 364 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:14:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-20 15:14:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 409. [2022-03-20 15:14:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 238 states have (on average 1.1890756302521008) internal successors, (283), 239 states have internal predecessors, (283), 139 states have call successors, (139), 32 states have call predecessors, (139), 31 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2022-03-20 15:14:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 559 transitions. [2022-03-20 15:14:07,506 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 559 transitions. Word has length 108 [2022-03-20 15:14:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:14:07,506 INFO L478 AbstractCegarLoop]: Abstraction has 409 states and 559 transitions. [2022-03-20 15:14:07,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-20 15:14:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 559 transitions. [2022-03-20 15:14:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 15:14:07,507 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:14:07,507 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 15:14:07,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 15:14:07,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:14:07,723 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:14:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:14:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 9 times [2022-03-20 15:14:07,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:07,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371530814] [2022-03-20 15:14:07,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:14:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 10 times [2022-03-20 15:14:07,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:14:07,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896533517] [2022-03-20 15:14:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:14:07,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:14:07,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:14:07,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304420036] [2022-03-20 15:14:07,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:14:07,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:14:07,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:14:07,731 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:14:07,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 15:14:07,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:14:07,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:14:07,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 15:14:07,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:14:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 57 proven. 73 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-20 15:14:09,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:14:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-20 15:14:10,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:14:10,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896533517] [2022-03-20 15:14:10,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:14:10,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304420036] [2022-03-20 15:14:10,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304420036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:14:10,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:14:10,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 30 [2022-03-20 15:14:10,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:14:10,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371530814] [2022-03-20 15:14:10,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371530814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:14:10,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:14:10,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 15:14:10,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254063934] [2022-03-20 15:14:10,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:14:10,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 15:14:10,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 15:14:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:14:10,669 INFO L87 Difference]: Start difference. First operand 409 states and 559 transitions. Second operand has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:14:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:14:12,201 INFO L93 Difference]: Finished difference Result 519 states and 707 transitions. [2022-03-20 15:14:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 15:14:12,202 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 107 [2022-03-20 15:14:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:14:12,204 INFO L225 Difference]: With dead ends: 519 [2022-03-20 15:14:12,204 INFO L226 Difference]: Without dead ends: 517 [2022-03-20 15:14:12,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 15:14:12,205 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 87 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 15:14:12,205 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 820 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 15:14:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-03-20 15:14:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 495. [2022-03-20 15:14:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 288 states have (on average 1.1909722222222223) internal successors, (343), 289 states have internal predecessors, (343), 171 states have call successors, (171), 36 states have call predecessors, (171), 35 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-03-20 15:14:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 683 transitions. [2022-03-20 15:14:12,316 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 683 transitions. Word has length 107 [2022-03-20 15:14:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:14:12,317 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 683 transitions. [2022-03-20 15:14:12,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:14:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 683 transitions. [2022-03-20 15:14:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 15:14:12,318 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:14:12,318 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1] [2022-03-20 15:14:12,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 15:14:12,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:14:12,531 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:14:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:14:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 7 times [2022-03-20 15:14:12,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1520215780] [2022-03-20 15:14:12,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:14:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 8 times [2022-03-20 15:14:12,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:14:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737747458] [2022-03-20 15:14:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:14:12,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:14:12,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:14:12,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193475540] [2022-03-20 15:14:12,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:14:12,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:14:12,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:14:12,541 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:14:12,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 15:14:12,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:14:12,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:14:12,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 15:14:12,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:14:13,476 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 15:14:14,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:14:15,252 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:15,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:14:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737747458] [2022-03-20 15:14:15,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:14:15,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193475540] [2022-03-20 15:14:15,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193475540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:14:15,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:14:15,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 15:14:15,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:14:15,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1520215780] [2022-03-20 15:14:15,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1520215780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:14:15,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:14:15,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:14:15,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493273519] [2022-03-20 15:14:15,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:14:15,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:14:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:15,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:14:15,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:14:15,601 INFO L87 Difference]: Start difference. First operand 495 states and 683 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:14:17,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:14:17,363 INFO L93 Difference]: Finished difference Result 584 states and 806 transitions. [2022-03-20 15:14:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 15:14:17,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2022-03-20 15:14:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:14:17,366 INFO L225 Difference]: With dead ends: 584 [2022-03-20 15:14:17,366 INFO L226 Difference]: Without dead ends: 581 [2022-03-20 15:14:17,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:14:17,367 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:14:17,367 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 555 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 15:14:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-20 15:14:17,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 527. [2022-03-20 15:14:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 306 states have (on average 1.1928104575163399) internal successors, (365), 307 states have internal predecessors, (365), 183 states have call successors, (183), 38 states have call predecessors, (183), 37 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-03-20 15:14:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 729 transitions. [2022-03-20 15:14:17,499 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 729 transitions. Word has length 111 [2022-03-20 15:14:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:14:17,499 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 729 transitions. [2022-03-20 15:14:17,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:14:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 729 transitions. [2022-03-20 15:14:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 15:14:17,500 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:14:17,500 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2022-03-20 15:14:17,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 15:14:17,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 15:14:17,719 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:14:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:14:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 9 times [2022-03-20 15:14:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:17,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [980394881] [2022-03-20 15:14:17,720 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:14:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 10 times [2022-03-20 15:14:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:14:17,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757664639] [2022-03-20 15:14:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:14:17,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:14:17,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:14:17,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619098451] [2022-03-20 15:14:17,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:14:17,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:14:17,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:14:17,728 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:14:17,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 15:14:17,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:14:17,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:14:17,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 15:14:17,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:14:18,851 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:18,853 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:18,856 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 15:14:29,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:14:30,973 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:30,974 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:34,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:14:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757664639] [2022-03-20 15:14:34,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:14:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619098451] [2022-03-20 15:14:34,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619098451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:14:34,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:14:34,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 15:14:34,305 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:14:34,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [980394881] [2022-03-20 15:14:34,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [980394881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:14:34,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:14:34,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 15:14:34,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978978790] [2022-03-20 15:14:34,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:14:34,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 15:14:34,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:34,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 15:14:34,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=643, Unknown=1, NotChecked=0, Total=756 [2022-03-20 15:14:34,306 INFO L87 Difference]: Start difference. First operand 527 states and 729 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:14:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:14:40,910 INFO L93 Difference]: Finished difference Result 619 states and 855 transitions. [2022-03-20 15:14:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 15:14:40,912 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 113 [2022-03-20 15:14:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:14:40,914 INFO L225 Difference]: With dead ends: 619 [2022-03-20 15:14:40,914 INFO L226 Difference]: Without dead ends: 616 [2022-03-20 15:14:40,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=146, Invalid=909, Unknown=1, NotChecked=0, Total=1056 [2022-03-20 15:14:40,916 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 71 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:14:40,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 630 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 15:14:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-03-20 15:14:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 596. [2022-03-20 15:14:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 343 states have (on average 1.1982507288629738) internal successors, (411), 344 states have internal predecessors, (411), 211 states have call successors, (211), 42 states have call predecessors, (211), 41 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2022-03-20 15:14:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 831 transitions. [2022-03-20 15:14:41,054 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 831 transitions. Word has length 113 [2022-03-20 15:14:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:14:41,054 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 831 transitions. [2022-03-20 15:14:41,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:14:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 831 transitions. [2022-03-20 15:14:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 15:14:41,055 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:14:41,055 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:14:41,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 15:14:41,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 15:14:41,271 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:14:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:14:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 11 times [2022-03-20 15:14:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:41,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [681800152] [2022-03-20 15:14:41,272 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:14:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 12 times [2022-03-20 15:14:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:14:41,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217052206] [2022-03-20 15:14:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:14:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:14:41,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:14:41,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119212598] [2022-03-20 15:14:41,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:14:41,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:14:41,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:14:41,281 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:14:41,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 15:14:41,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:14:41,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:14:41,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 15:14:41,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:14:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-20 15:14:42,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:14:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-20 15:14:45,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:14:45,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217052206] [2022-03-20 15:14:45,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:14:45,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119212598] [2022-03-20 15:14:45,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119212598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:14:45,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:14:45,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2022-03-20 15:14:45,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:14:45,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [681800152] [2022-03-20 15:14:45,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [681800152] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:14:45,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:14:45,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:14:45,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245032736] [2022-03-20 15:14:45,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:14:45,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:14:45,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:14:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:14:45,377 INFO L87 Difference]: Start difference. First operand 596 states and 831 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 15:14:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:14:46,648 INFO L93 Difference]: Finished difference Result 665 states and 919 transitions. [2022-03-20 15:14:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 15:14:46,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 116 [2022-03-20 15:14:46,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:14:46,651 INFO L225 Difference]: With dead ends: 665 [2022-03-20 15:14:46,651 INFO L226 Difference]: Without dead ends: 662 [2022-03-20 15:14:46,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 15:14:46,652 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 79 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:14:46,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 669 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 15:14:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-20 15:14:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 600. [2022-03-20 15:14:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 346 states have (on average 1.1965317919075145) internal successors, (414), 347 states have internal predecessors, (414), 211 states have call successors, (211), 43 states have call predecessors, (211), 42 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2022-03-20 15:14:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 834 transitions. [2022-03-20 15:14:46,800 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 834 transitions. Word has length 116 [2022-03-20 15:14:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:14:46,801 INFO L478 AbstractCegarLoop]: Abstraction has 600 states and 834 transitions. [2022-03-20 15:14:46,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 15:14:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 834 transitions. [2022-03-20 15:14:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 15:14:46,803 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:14:46,803 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:14:46,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 15:14:47,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:14:47,019 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:14:47,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:14:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 13 times [2022-03-20 15:14:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:47,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1388779245] [2022-03-20 15:14:47,020 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:14:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 14 times [2022-03-20 15:14:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:14:47,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221241665] [2022-03-20 15:14:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:14:47,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:14:47,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:14:47,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133770508] [2022-03-20 15:14:47,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:14:47,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:14:47,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:14:47,029 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:14:47,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 15:14:47,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:14:47,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:14:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 15:14:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:14:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 15:14:48,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:14:50,669 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:50,671 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:14:55,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:14:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221241665] [2022-03-20 15:14:55,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:14:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133770508] [2022-03-20 15:14:55,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133770508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:14:55,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:14:55,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 15:14:55,331 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:14:55,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1388779245] [2022-03-20 15:14:55,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1388779245] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:14:55,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:14:55,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:14:55,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441070392] [2022-03-20 15:14:55,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:14:55,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:14:55,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:55,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:14:55,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=702, Unknown=1, NotChecked=0, Total=812 [2022-03-20 15:14:55,332 INFO L87 Difference]: Start difference. First operand 600 states and 834 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:14:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:14:57,298 INFO L93 Difference]: Finished difference Result 691 states and 960 transitions. [2022-03-20 15:14:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 15:14:57,298 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 116 [2022-03-20 15:14:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:14:57,301 INFO L225 Difference]: With dead ends: 691 [2022-03-20 15:14:57,301 INFO L226 Difference]: Without dead ends: 688 [2022-03-20 15:14:57,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=189, Invalid=1216, Unknown=1, NotChecked=0, Total=1406 [2022-03-20 15:14:57,302 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 71 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:14:57,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 784 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 15:14:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-20 15:14:57,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 665. [2022-03-20 15:14:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 380 states have (on average 1.2026315789473685) internal successors, (457), 381 states have internal predecessors, (457), 239 states have call successors, (239), 46 states have call predecessors, (239), 45 states have return successors, (237), 237 states have call predecessors, (237), 237 states have call successors, (237) [2022-03-20 15:14:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 933 transitions. [2022-03-20 15:14:57,466 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 933 transitions. Word has length 116 [2022-03-20 15:14:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:14:57,466 INFO L478 AbstractCegarLoop]: Abstraction has 665 states and 933 transitions. [2022-03-20 15:14:57,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:14:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 933 transitions. [2022-03-20 15:14:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 15:14:57,477 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:14:57,477 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:14:57,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 15:14:57,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:14:57,691 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:14:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:14:57,692 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 15 times [2022-03-20 15:14:57,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:14:57,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [383844938] [2022-03-20 15:14:57,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:14:57,692 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 16 times [2022-03-20 15:14:57,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:14:57,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396336167] [2022-03-20 15:14:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:14:57,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:14:57,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:14:57,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88761912] [2022-03-20 15:14:57,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:14:57,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:14:57,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:14:57,700 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:14:57,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 15:14:57,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:14:57,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:14:57,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 118 conjunts are in the unsatisfiable core [2022-03-20 15:14:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:14:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 113 proven. 70 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 15:14:59,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 15:15:01,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:01,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396336167] [2022-03-20 15:15:01,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:01,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88761912] [2022-03-20 15:15:01,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88761912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:15:01,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:15:01,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 35 [2022-03-20 15:15:01,259 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:01,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [383844938] [2022-03-20 15:15:01,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [383844938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:01,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:01,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 15:15:01,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893725098] [2022-03-20 15:15:01,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:01,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 15:15:01,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 15:15:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 15:15:01,260 INFO L87 Difference]: Start difference. First operand 665 states and 933 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:15:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:03,148 INFO L93 Difference]: Finished difference Result 773 states and 1073 transitions. [2022-03-20 15:15:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 15:15:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 121 [2022-03-20 15:15:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:03,151 INFO L225 Difference]: With dead ends: 773 [2022-03-20 15:15:03,152 INFO L226 Difference]: Without dead ends: 770 [2022-03-20 15:15:03,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 15:15:03,152 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 110 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:03,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 920 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 15:15:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-20 15:15:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 699. [2022-03-20 15:15:03,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 398 states have (on average 1.2035175879396984) internal successors, (479), 399 states have internal predecessors, (479), 251 states have call successors, (251), 50 states have call predecessors, (251), 49 states have return successors, (249), 249 states have call predecessors, (249), 249 states have call successors, (249) [2022-03-20 15:15:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 979 transitions. [2022-03-20 15:15:03,323 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 979 transitions. Word has length 121 [2022-03-20 15:15:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:03,324 INFO L478 AbstractCegarLoop]: Abstraction has 699 states and 979 transitions. [2022-03-20 15:15:03,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 15:15:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 979 transitions. [2022-03-20 15:15:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 15:15:03,329 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:03,330 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 15:15:03,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:03,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 15:15:03,535 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 3 times [2022-03-20 15:15:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:03,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1303867276] [2022-03-20 15:15:03,536 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 4 times [2022-03-20 15:15:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:03,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273638253] [2022-03-20 15:15:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:03,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:03,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:03,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531932543] [2022-03-20 15:15:03,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:15:03,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:03,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:03,543 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:03,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 15:15:03,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:15:03,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:03,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 15:15:03,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:04,549 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 76 proven. 113 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-20 15:15:04,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 110 proven. 27 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-03-20 15:15:05,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:05,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273638253] [2022-03-20 15:15:05,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:05,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531932543] [2022-03-20 15:15:05,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531932543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:15:05,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:15:05,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 29 [2022-03-20 15:15:05,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:05,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1303867276] [2022-03-20 15:15:05,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1303867276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:05,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:05,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:15:05,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141985581] [2022-03-20 15:15:05,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:05,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:15:05,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:05,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:15:05,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:15:05,836 INFO L87 Difference]: Start difference. First operand 699 states and 979 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 15:15:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:07,101 INFO L93 Difference]: Finished difference Result 818 states and 1133 transitions. [2022-03-20 15:15:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 15:15:07,101 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) Word has length 124 [2022-03-20 15:15:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:07,104 INFO L225 Difference]: With dead ends: 818 [2022-03-20 15:15:07,104 INFO L226 Difference]: Without dead ends: 816 [2022-03-20 15:15:07,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:15:07,105 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 78 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:07,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 769 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 15:15:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-03-20 15:15:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 751. [2022-03-20 15:15:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 429 states have (on average 1.2004662004662006) internal successors, (515), 430 states have internal predecessors, (515), 267 states have call successors, (267), 55 states have call predecessors, (267), 54 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2022-03-20 15:15:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1047 transitions. [2022-03-20 15:15:07,291 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1047 transitions. Word has length 124 [2022-03-20 15:15:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:07,291 INFO L478 AbstractCegarLoop]: Abstraction has 751 states and 1047 transitions. [2022-03-20 15:15:07,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 15:15:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1047 transitions. [2022-03-20 15:15:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 15:15:07,293 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:07,293 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 15:15:07,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:07,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 15:15:07,506 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:07,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:07,506 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 5 times [2022-03-20 15:15:07,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:07,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1198309973] [2022-03-20 15:15:07,507 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 6 times [2022-03-20 15:15:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:07,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250279336] [2022-03-20 15:15:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:07,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:07,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:07,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647431394] [2022-03-20 15:15:07,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:15:07,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:07,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:07,516 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:07,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 15:15:07,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:15:07,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:07,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 15:15:07,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 95 proven. 62 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-03-20 15:15:07,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:10,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:10,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250279336] [2022-03-20 15:15:10,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:10,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647431394] [2022-03-20 15:15:10,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647431394] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:15:10,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:15:10,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 15:15:10,578 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:10,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1198309973] [2022-03-20 15:15:10,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1198309973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:10,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:10,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 15:15:10,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219045473] [2022-03-20 15:15:10,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:10,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 15:15:10,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 15:15:10,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:15:10,579 INFO L87 Difference]: Start difference. First operand 751 states and 1047 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 15:15:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:11,280 INFO L93 Difference]: Finished difference Result 792 states and 1089 transitions. [2022-03-20 15:15:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:15:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 129 [2022-03-20 15:15:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:11,283 INFO L225 Difference]: With dead ends: 792 [2022-03-20 15:15:11,283 INFO L226 Difference]: Without dead ends: 790 [2022-03-20 15:15:11,284 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:15:11,284 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:11,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 267 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 15:15:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-03-20 15:15:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 764. [2022-03-20 15:15:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 438 states have (on average 1.1963470319634704) internal successors, (524), 440 states have internal predecessors, (524), 269 states have call successors, (269), 57 states have call predecessors, (269), 56 states have return successors, (267), 266 states have call predecessors, (267), 267 states have call successors, (267) [2022-03-20 15:15:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1060 transitions. [2022-03-20 15:15:11,480 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1060 transitions. Word has length 129 [2022-03-20 15:15:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:11,480 INFO L478 AbstractCegarLoop]: Abstraction has 764 states and 1060 transitions. [2022-03-20 15:15:11,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 15:15:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1060 transitions. [2022-03-20 15:15:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 15:15:11,482 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:11,482 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-20 15:15:11,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:11,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 15:15:11,696 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 17 times [2022-03-20 15:15:11,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:11,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [324276049] [2022-03-20 15:15:11,696 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 18 times [2022-03-20 15:15:11,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:11,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831678408] [2022-03-20 15:15:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:11,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:11,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:11,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799550958] [2022-03-20 15:15:11,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:15:11,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:11,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:11,703 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:11,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 15:15:11,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:15:11,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 15:15:11,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-03-20 15:15:11,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 15:15:12,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:12,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831678408] [2022-03-20 15:15:12,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:12,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799550958] [2022-03-20 15:15:12,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799550958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:15:12,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:15:12,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 15:15:12,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:12,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [324276049] [2022-03-20 15:15:12,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [324276049] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:12,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:12,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 15:15:12,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244506863] [2022-03-20 15:15:12,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:12,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 15:15:12,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:12,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 15:15:12,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:15:12,172 INFO L87 Difference]: Start difference. First operand 764 states and 1060 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-20 15:15:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:12,596 INFO L93 Difference]: Finished difference Result 1341 states and 1936 transitions. [2022-03-20 15:15:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:15:12,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 133 [2022-03-20 15:15:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:12,601 INFO L225 Difference]: With dead ends: 1341 [2022-03-20 15:15:12,601 INFO L226 Difference]: Without dead ends: 991 [2022-03-20 15:15:12,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:15:12,602 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:12,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 291 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:15:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-03-20 15:15:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 873. [2022-03-20 15:15:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 484 states have (on average 1.2148760330578512) internal successors, (588), 499 states have internal predecessors, (588), 336 states have call successors, (336), 53 states have call predecessors, (336), 52 states have return successors, (334), 320 states have call predecessors, (334), 334 states have call successors, (334) [2022-03-20 15:15:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1258 transitions. [2022-03-20 15:15:12,855 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1258 transitions. Word has length 133 [2022-03-20 15:15:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:12,855 INFO L478 AbstractCegarLoop]: Abstraction has 873 states and 1258 transitions. [2022-03-20 15:15:12,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-03-20 15:15:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1258 transitions. [2022-03-20 15:15:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 15:15:12,856 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:12,856 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-20 15:15:12,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:13,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 15:15:13,068 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:13,068 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 19 times [2022-03-20 15:15:13,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:13,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1264026448] [2022-03-20 15:15:13,069 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 20 times [2022-03-20 15:15:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:13,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239363581] [2022-03-20 15:15:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:13,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:13,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:13,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978560910] [2022-03-20 15:15:13,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:15:13,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:13,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:13,075 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:13,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 15:15:13,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:15:13,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:13,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 15:15:13,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 133 proven. 88 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 15:15:14,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 134 proven. 60 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 15:15:16,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239363581] [2022-03-20 15:15:16,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978560910] [2022-03-20 15:15:16,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978560910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:15:16,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:15:16,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-20 15:15:16,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:16,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1264026448] [2022-03-20 15:15:16,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1264026448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:16,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:16,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:15:16,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628415911] [2022-03-20 15:15:16,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:16,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:15:16,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:16,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:15:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-03-20 15:15:16,266 INFO L87 Difference]: Start difference. First operand 873 states and 1258 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 15:15:17,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:17,352 INFO L93 Difference]: Finished difference Result 1004 states and 1446 transitions. [2022-03-20 15:15:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:15:17,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-03-20 15:15:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:17,356 INFO L225 Difference]: With dead ends: 1004 [2022-03-20 15:15:17,356 INFO L226 Difference]: Without dead ends: 1001 [2022-03-20 15:15:17,357 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 15:15:17,357 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 51 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:17,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 586 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 15:15:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-03-20 15:15:17,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 912. [2022-03-20 15:15:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 504 states have (on average 1.2162698412698412) internal successors, (613), 519 states have internal predecessors, (613), 352 states have call successors, (352), 56 states have call predecessors, (352), 55 states have return successors, (350), 336 states have call predecessors, (350), 350 states have call successors, (350) [2022-03-20 15:15:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1315 transitions. [2022-03-20 15:15:17,635 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1315 transitions. Word has length 133 [2022-03-20 15:15:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:17,636 INFO L478 AbstractCegarLoop]: Abstraction has 912 states and 1315 transitions. [2022-03-20 15:15:17,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 15:15:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1315 transitions. [2022-03-20 15:15:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 15:15:17,637 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:17,637 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:15:17,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:17,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 15:15:17,844 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:17,845 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 21 times [2022-03-20 15:15:17,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:17,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1904266976] [2022-03-20 15:15:17,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:17,845 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 22 times [2022-03-20 15:15:17,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:17,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652766575] [2022-03-20 15:15:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:17,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:17,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:17,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906537323] [2022-03-20 15:15:17,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:15:17,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:17,852 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:17,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 15:15:17,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:15:17,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:17,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 15:15:17,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:19,530 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:19,533 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:19,539 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:19,544 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:19,550 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 116 proven. 82 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 15:15:21,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:25,970 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:26,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:15:26,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652766575] [2022-03-20 15:15:26,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:15:26,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906537323] [2022-03-20 15:15:26,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906537323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:15:26,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:15:26,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 15:15:26,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:15:26,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1904266976] [2022-03-20 15:15:26,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1904266976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:15:26,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:15:26,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:15:26,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730040261] [2022-03-20 15:15:26,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:15:26,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:15:26,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:15:26,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-03-20 15:15:26,489 INFO L87 Difference]: Start difference. First operand 912 states and 1315 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:15:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:15:35,953 INFO L93 Difference]: Finished difference Result 1048 states and 1511 transitions. [2022-03-20 15:15:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 15:15:35,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 135 [2022-03-20 15:15:35,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:15:35,958 INFO L225 Difference]: With dead ends: 1048 [2022-03-20 15:15:35,958 INFO L226 Difference]: Without dead ends: 1045 [2022-03-20 15:15:35,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 15:15:35,959 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 69 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-20 15:15:35,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 795 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-20 15:15:35,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-03-20 15:15:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1005. [2022-03-20 15:15:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 551 states have (on average 1.221415607985481) internal successors, (673), 567 states have internal predecessors, (673), 394 states have call successors, (394), 60 states have call predecessors, (394), 59 states have return successors, (392), 377 states have call predecessors, (392), 392 states have call successors, (392) [2022-03-20 15:15:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1459 transitions. [2022-03-20 15:15:36,263 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1459 transitions. Word has length 135 [2022-03-20 15:15:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:15:36,263 INFO L478 AbstractCegarLoop]: Abstraction has 1005 states and 1459 transitions. [2022-03-20 15:15:36,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:15:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1459 transitions. [2022-03-20 15:15:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 15:15:36,265 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:15:36,265 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-20 15:15:36,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 15:15:36,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:36,471 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:15:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:15:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 23 times [2022-03-20 15:15:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:15:36,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1692851292] [2022-03-20 15:15:36,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:15:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 24 times [2022-03-20 15:15:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:15:36,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761342656] [2022-03-20 15:15:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:15:36,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:15:36,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:15:36,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101704847] [2022-03-20 15:15:36,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:15:36,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:15:36,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:15:36,485 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:15:36,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 15:15:36,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 15:15:36,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:15:36,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 15:15:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:15:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 98 proven. 107 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 15:15:39,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:15:43,750 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:43,752 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:43,753 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:51,294 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:15:51,304 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 98 proven. 107 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 15:16:24,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:24,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761342656] [2022-03-20 15:16:24,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:24,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101704847] [2022-03-20 15:16:24,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101704847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:16:24,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:16:24,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2022-03-20 15:16:24,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:24,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1692851292] [2022-03-20 15:16:24,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1692851292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:24,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:24,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:16:24,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450673561] [2022-03-20 15:16:24,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:24,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:16:24,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:24,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:16:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1173, Unknown=3, NotChecked=0, Total=1406 [2022-03-20 15:16:24,619 INFO L87 Difference]: Start difference. First operand 1005 states and 1459 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:16:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:27,134 INFO L93 Difference]: Finished difference Result 1050 states and 1510 transitions. [2022-03-20 15:16:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 15:16:27,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-20 15:16:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:27,140 INFO L225 Difference]: With dead ends: 1050 [2022-03-20 15:16:27,140 INFO L226 Difference]: Without dead ends: 1043 [2022-03-20 15:16:27,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=267, Invalid=1452, Unknown=3, NotChecked=0, Total=1722 [2022-03-20 15:16:27,142 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 55 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:27,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 769 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 956 Invalid, 0 Unknown, 175 Unchecked, 1.0s Time] [2022-03-20 15:16:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-03-20 15:16:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1011. [2022-03-20 15:16:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 557 states have (on average 1.2190305206463197) internal successors, (679), 573 states have internal predecessors, (679), 394 states have call successors, (394), 60 states have call predecessors, (394), 59 states have return successors, (392), 377 states have call predecessors, (392), 392 states have call successors, (392) [2022-03-20 15:16:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1465 transitions. [2022-03-20 15:16:27,473 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1465 transitions. Word has length 138 [2022-03-20 15:16:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:27,473 INFO L478 AbstractCegarLoop]: Abstraction has 1011 states and 1465 transitions. [2022-03-20 15:16:27,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:16:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1465 transitions. [2022-03-20 15:16:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 15:16:27,475 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:27,475 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-20 15:16:27,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:27,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 15:16:27,694 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 25 times [2022-03-20 15:16:27,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:27,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [103400970] [2022-03-20 15:16:27,695 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 26 times [2022-03-20 15:16:27,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:27,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326013159] [2022-03-20 15:16:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:27,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:27,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:27,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188820781] [2022-03-20 15:16:27,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:16:27,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:27,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:27,703 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:27,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 15:16:27,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:16:27,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:27,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 15:16:27,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 163 proven. 69 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 15:16:31,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:16:39,214 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:44,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:16:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326013159] [2022-03-20 15:16:44,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:16:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188820781] [2022-03-20 15:16:44,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188820781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:16:44,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:16:44,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 15:16:44,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:16:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [103400970] [2022-03-20 15:16:44,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [103400970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:16:44,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:16:44,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:16:44,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20211537] [2022-03-20 15:16:44,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:16:44,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:16:44,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:16:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=860, Unknown=1, NotChecked=0, Total=992 [2022-03-20 15:16:44,017 INFO L87 Difference]: Start difference. First operand 1011 states and 1465 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:16:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:16:51,555 INFO L93 Difference]: Finished difference Result 1089 states and 1573 transitions. [2022-03-20 15:16:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 15:16:51,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-20 15:16:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:16:51,561 INFO L225 Difference]: With dead ends: 1089 [2022-03-20 15:16:51,561 INFO L226 Difference]: Without dead ends: 1082 [2022-03-20 15:16:51,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=199, Invalid=1360, Unknown=1, NotChecked=0, Total=1560 [2022-03-20 15:16:51,562 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 77 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:16:51,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 685 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 770 Invalid, 0 Unknown, 319 Unchecked, 1.1s Time] [2022-03-20 15:16:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-03-20 15:16:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1040. [2022-03-20 15:16:51,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 570 states have (on average 1.2228070175438597) internal successors, (697), 585 states have internal predecessors, (697), 410 states have call successors, (410), 61 states have call predecessors, (410), 59 states have return successors, (408), 393 states have call predecessors, (408), 408 states have call successors, (408) [2022-03-20 15:16:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1515 transitions. [2022-03-20 15:16:51,901 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1515 transitions. Word has length 138 [2022-03-20 15:16:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:16:51,901 INFO L478 AbstractCegarLoop]: Abstraction has 1040 states and 1515 transitions. [2022-03-20 15:16:51,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:16:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1515 transitions. [2022-03-20 15:16:51,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 15:16:51,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:16:51,904 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-20 15:16:51,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 15:16:52,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:52,123 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:16:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:16:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 27 times [2022-03-20 15:16:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:16:52,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1710680037] [2022-03-20 15:16:52,124 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:16:52,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 28 times [2022-03-20 15:16:52,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:16:52,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54272326] [2022-03-20 15:16:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:16:52,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:16:52,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:16:52,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554707455] [2022-03-20 15:16:52,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:16:52,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:16:52,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:16:52,135 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:16:52,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 15:16:52,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:16:52,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:16:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 15:16:52,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:16:52,778 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:54,369 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:54,370 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:54,372 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:54,374 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:54,377 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:54,379 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:16:54,381 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:17:07,108 WARN L232 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:17:27,879 WARN L232 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:17:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 132 proven. 121 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-20 15:17:32,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:17:45,058 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:17:50,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:17:50,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54272326] [2022-03-20 15:17:50,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:17:50,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554707455] [2022-03-20 15:17:50,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554707455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:17:50,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:17:50,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 15:17:50,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:17:50,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1710680037] [2022-03-20 15:17:50,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1710680037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:17:50,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:17:50,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 15:17:50,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575801036] [2022-03-20 15:17:50,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:17:50,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 15:17:50,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:17:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 15:17:50,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:17:50,080 INFO L87 Difference]: Start difference. First operand 1040 states and 1515 transitions. Second operand has 23 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 15:17:56,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:18:29,429 WARN L232 SmtUtils]: Spent 28.57s on a formula simplification. DAG size of input: 137 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:18:32,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:18:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:18:40,228 INFO L93 Difference]: Finished difference Result 1157 states and 1676 transitions. [2022-03-20 15:18:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 15:18:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 138 [2022-03-20 15:18:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:18:40,234 INFO L225 Difference]: With dead ends: 1157 [2022-03-20 15:18:40,234 INFO L226 Difference]: Without dead ends: 1154 [2022-03-20 15:18:40,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 70.9s TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 15:18:40,235 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 90 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:18:40,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 907 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1384 Invalid, 1 Unknown, 0 Unchecked, 15.5s Time] [2022-03-20 15:18:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-03-20 15:18:40,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1049. [2022-03-20 15:18:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 577 states have (on average 1.2218370883882148) internal successors, (705), 593 states have internal predecessors, (705), 411 states have call successors, (411), 62 states have call predecessors, (411), 60 states have return successors, (409), 393 states have call predecessors, (409), 409 states have call successors, (409) [2022-03-20 15:18:40,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1525 transitions. [2022-03-20 15:18:40,611 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1525 transitions. Word has length 138 [2022-03-20 15:18:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:18:40,611 INFO L478 AbstractCegarLoop]: Abstraction has 1049 states and 1525 transitions. [2022-03-20 15:18:40,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 15:18:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1525 transitions. [2022-03-20 15:18:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 15:18:40,613 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:18:40,613 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:18:40,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 15:18:40,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:40,825 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:18:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:18:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 29 times [2022-03-20 15:18:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:40,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [764766863] [2022-03-20 15:18:40,826 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:18:40,826 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 30 times [2022-03-20 15:18:40,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:18:40,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836853785] [2022-03-20 15:18:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:18:40,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:18:40,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:18:40,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925629040] [2022-03-20 15:18:40,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:18:40,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:40,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:40,833 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:18:40,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 15:18:40,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:18:40,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:18:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 15:18:40,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:18:42,308 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:18:42,311 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:18:42,312 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:19:13,550 WARN L232 SmtUtils]: Spent 14.29s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:19:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 103 proven. 139 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 15:19:16,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:31,616 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:19:31,620 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:19:38,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:38,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836853785] [2022-03-20 15:19:38,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:38,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925629040] [2022-03-20 15:19:38,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925629040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:19:38,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:19:38,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 15:19:38,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:38,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [764766863] [2022-03-20 15:19:38,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [764766863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:38,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:38,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 15:19:38,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370416771] [2022-03-20 15:19:38,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:38,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 15:19:38,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:38,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 15:19:38,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=853, Unknown=8, NotChecked=0, Total=992 [2022-03-20 15:19:38,163 INFO L87 Difference]: Start difference. First operand 1049 states and 1525 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:20:29,137 WARN L232 SmtUtils]: Spent 33.56s on a formula simplification. DAG size of input: 105 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:20:31,262 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:20:33,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:20:35,664 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:20:37,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:20:39,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:20:41,744 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:20:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:42,356 INFO L93 Difference]: Finished difference Result 1119 states and 1601 transitions. [2022-03-20 15:20:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 15:20:42,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 141 [2022-03-20 15:20:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:42,362 INFO L225 Difference]: With dead ends: 1119 [2022-03-20 15:20:42,362 INFO L226 Difference]: Without dead ends: 1112 [2022-03-20 15:20:42,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 84.4s TimeCoverageRelationStatistics Valid=178, Invalid=1291, Unknown=13, NotChecked=0, Total=1482 [2022-03-20 15:20:42,363 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 63 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 57 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:42,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 890 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1227 Invalid, 6 Unknown, 0 Unchecked, 17.4s Time] [2022-03-20 15:20:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-03-20 15:20:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1078. [2022-03-20 15:20:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 599 states have (on average 1.2136894824707847) internal successors, (727), 615 states have internal predecessors, (727), 414 states have call successors, (414), 66 states have call predecessors, (414), 64 states have return successors, (412), 396 states have call predecessors, (412), 412 states have call successors, (412) [2022-03-20 15:20:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1553 transitions. [2022-03-20 15:20:42,735 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1553 transitions. Word has length 141 [2022-03-20 15:20:42,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:42,735 INFO L478 AbstractCegarLoop]: Abstraction has 1078 states and 1553 transitions. [2022-03-20 15:20:42,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:20:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1553 transitions. [2022-03-20 15:20:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 15:20:42,737 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:42,737 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 15:20:42,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:42,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 15:20:42,940 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:42,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:42,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 31 times [2022-03-20 15:20:42,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:42,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [584130406] [2022-03-20 15:20:42,940 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:42,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 32 times [2022-03-20 15:20:42,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:42,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118239490] [2022-03-20 15:20:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:42,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:42,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:42,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746574539] [2022-03-20 15:20:42,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:20:42,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:42,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:42,946 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:42,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 15:20:43,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:20:43,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:43,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-20 15:20:43,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 133 proven. 115 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 15:20:46,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:47,343 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:20:50,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:20:50,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118239490] [2022-03-20 15:20:50,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:20:50,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746574539] [2022-03-20 15:20:50,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746574539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:20:50,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:20:50,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-20 15:20:50,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:20:50,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [584130406] [2022-03-20 15:20:50,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [584130406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:20:50,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:20:50,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 15:20:50,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380440913] [2022-03-20 15:20:50,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:20:50,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 15:20:50,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:50,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 15:20:50,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-03-20 15:20:50,218 INFO L87 Difference]: Start difference. First operand 1078 states and 1553 transitions. Second operand has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 15:20:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:55,597 INFO L93 Difference]: Finished difference Result 1226 states and 1765 transitions. [2022-03-20 15:20:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 15:20:55,599 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 143 [2022-03-20 15:20:55,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:55,604 INFO L225 Difference]: With dead ends: 1226 [2022-03-20 15:20:55,604 INFO L226 Difference]: Without dead ends: 1223 [2022-03-20 15:20:55,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 15:20:55,604 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 89 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:55,605 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1136 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 15:20:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-03-20 15:20:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1167. [2022-03-20 15:20:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 643 states have (on average 1.219284603421462) internal successors, (784), 660 states have internal predecessors, (784), 456 states have call successors, (456), 69 states have call predecessors, (456), 67 states have return successors, (454), 437 states have call predecessors, (454), 454 states have call successors, (454) [2022-03-20 15:20:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1694 transitions. [2022-03-20 15:20:56,020 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1694 transitions. Word has length 143 [2022-03-20 15:20:56,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:56,021 INFO L478 AbstractCegarLoop]: Abstraction has 1167 states and 1694 transitions. [2022-03-20 15:20:56,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 15:20:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1694 transitions. [2022-03-20 15:20:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 15:20:56,022 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:56,022 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 15:20:56,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:56,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 15:20:56,223 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:56,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 33 times [2022-03-20 15:20:56,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:56,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [210368443] [2022-03-20 15:20:56,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:56,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 34 times [2022-03-20 15:20:56,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:56,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646994874] [2022-03-20 15:20:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:56,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:56,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:56,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986077417] [2022-03-20 15:20:56,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:20:56,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:56,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:56,230 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:56,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 15:20:56,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:20:56,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:56,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-20 15:20:56,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 147 proven. 122 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-20 15:20:57,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:58,200 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:21:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:21:01,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646994874] [2022-03-20 15:21:01,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:21:01,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986077417] [2022-03-20 15:21:01,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986077417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:21:01,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:21:01,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 15:21:01,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:21:01,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [210368443] [2022-03-20 15:21:01,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [210368443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:21:01,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:21:01,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 15:21:01,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501904750] [2022-03-20 15:21:01,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:21:01,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 15:21:01,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:21:01,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 15:21:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:21:01,359 INFO L87 Difference]: Start difference. First operand 1167 states and 1694 transitions. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:21:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:21:04,257 INFO L93 Difference]: Finished difference Result 1359 states and 1964 transitions. [2022-03-20 15:21:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 15:21:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 143 [2022-03-20 15:21:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:21:04,263 INFO L225 Difference]: With dead ends: 1359 [2022-03-20 15:21:04,263 INFO L226 Difference]: Without dead ends: 1356 [2022-03-20 15:21:04,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 15:21:04,263 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 99 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:21:04,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1356 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 15:21:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-03-20 15:21:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1212. [2022-03-20 15:21:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 670 states have (on average 1.2164179104477613) internal successors, (815), 688 states have internal predecessors, (815), 470 states have call successors, (470), 73 states have call predecessors, (470), 71 states have return successors, (468), 450 states have call predecessors, (468), 468 states have call successors, (468) [2022-03-20 15:21:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1753 transitions. [2022-03-20 15:21:04,710 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1753 transitions. Word has length 143 [2022-03-20 15:21:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:21:04,711 INFO L478 AbstractCegarLoop]: Abstraction has 1212 states and 1753 transitions. [2022-03-20 15:21:04,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 15:21:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1753 transitions. [2022-03-20 15:21:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 15:21:04,712 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:21:04,713 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:21:04,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 15:21:04,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 15:21:04,942 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:21:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:21:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1105634999, now seen corresponding path program 7 times [2022-03-20 15:21:04,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:21:04,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1254758189] [2022-03-20 15:21:04,942 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:21:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1105634999, now seen corresponding path program 8 times [2022-03-20 15:21:04,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:21:04,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554672191] [2022-03-20 15:21:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:21:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:21:04,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:21:04,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799785196] [2022-03-20 15:21:04,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:21:04,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:21:04,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:21:04,948 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:21:04,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 15:21:05,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:21:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:21:05,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 15:21:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:21:08,203 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:21:08,689 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:21:08,691 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:21:08,694 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:21:08,698 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:21:08,700 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:21:12,731 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:21:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 161 proven. 138 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-03-20 15:21:13,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:21:20,442 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:21:20,446 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:21:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 183 proven. 103 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-03-20 15:21:31,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:21:31,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554672191] [2022-03-20 15:21:31,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:21:31,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799785196] [2022-03-20 15:21:31,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799785196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:21:31,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:21:31,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 37 [2022-03-20 15:21:31,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:21:31,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1254758189] [2022-03-20 15:21:31,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1254758189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:21:31,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:21:31,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 15:21:31,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351812133] [2022-03-20 15:21:31,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:21:31,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 15:21:31,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:21:31,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 15:21:31,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1104, Unknown=1, NotChecked=0, Total=1332 [2022-03-20 15:21:31,814 INFO L87 Difference]: Start difference. First operand 1212 states and 1753 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 15:21:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:21:39,392 INFO L93 Difference]: Finished difference Result 1324 states and 1903 transitions. [2022-03-20 15:21:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 15:21:39,394 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 146 [2022-03-20 15:21:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:21:39,400 INFO L225 Difference]: With dead ends: 1324 [2022-03-20 15:21:39,400 INFO L226 Difference]: Without dead ends: 1322 [2022-03-20 15:21:39,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 253 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=295, Invalid=1596, Unknown=1, NotChecked=0, Total=1892 [2022-03-20 15:21:39,402 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 92 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-20 15:21:39,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 919 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-20 15:21:39,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-03-20 15:21:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1278. [2022-03-20 15:21:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 706 states have (on average 1.2167138810198301) internal successors, (859), 725 states have internal predecessors, (859), 496 states have call successors, (496), 77 states have call predecessors, (496), 75 states have return successors, (494), 475 states have call predecessors, (494), 494 states have call successors, (494) [2022-03-20 15:21:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1849 transitions. [2022-03-20 15:21:39,933 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1849 transitions. Word has length 146 [2022-03-20 15:21:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:21:39,933 INFO L478 AbstractCegarLoop]: Abstraction has 1278 states and 1849 transitions. [2022-03-20 15:21:39,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 15:21:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1849 transitions. [2022-03-20 15:21:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 15:21:39,935 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:21:39,935 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:21:39,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 15:21:40,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:21:40,156 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:21:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:21:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1351700721, now seen corresponding path program 9 times [2022-03-20 15:21:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:21:40,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240705665] [2022-03-20 15:21:40,157 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:21:40,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1351700721, now seen corresponding path program 10 times [2022-03-20 15:21:40,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:21:40,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726120530] [2022-03-20 15:21:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:21:40,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:21:40,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:21:40,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091937776] [2022-03-20 15:21:40,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:21:40,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:21:40,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:21:40,163 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:21:40,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 15:21:40,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:21:40,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:21:40,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-20 15:21:40,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:21:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 154 proven. 154 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-03-20 15:21:41,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:21:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 200 proven. 22 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-20 15:21:50,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:21:50,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726120530] [2022-03-20 15:21:50,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:21:50,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091937776] [2022-03-20 15:21:50,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091937776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:21:50,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:21:50,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 29 [2022-03-20 15:21:50,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:21:50,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240705665] [2022-03-20 15:21:50,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240705665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:21:50,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:21:50,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:21:50,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268940339] [2022-03-20 15:21:50,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:21:50,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:21:50,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:21:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:21:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:21:50,340 INFO L87 Difference]: Start difference. First operand 1278 states and 1849 transitions. Second operand has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-03-20 15:21:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:21:51,765 INFO L93 Difference]: Finished difference Result 1381 states and 1992 transitions. [2022-03-20 15:21:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 15:21:51,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) Word has length 146 [2022-03-20 15:21:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:21:51,772 INFO L225 Difference]: With dead ends: 1381 [2022-03-20 15:21:51,772 INFO L226 Difference]: Without dead ends: 1379 [2022-03-20 15:21:51,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 260 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 15:21:51,773 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 76 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:21:51,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 735 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 15:21:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-03-20 15:21:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1335. [2022-03-20 15:21:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 734 states have (on average 1.2193460490463215) internal successors, (895), 755 states have internal predecessors, (895), 522 states have call successors, (522), 79 states have call predecessors, (522), 78 states have return successors, (520), 500 states have call predecessors, (520), 520 states have call successors, (520) [2022-03-20 15:21:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1937 transitions. [2022-03-20 15:21:52,275 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1937 transitions. Word has length 146 [2022-03-20 15:21:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:21:52,275 INFO L478 AbstractCegarLoop]: Abstraction has 1335 states and 1937 transitions. [2022-03-20 15:21:52,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-03-20 15:21:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1937 transitions. [2022-03-20 15:21:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 15:21:52,277 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:21:52,278 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:21:52,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 15:21:52,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 15:21:52,491 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:21:52,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:21:52,491 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 35 times [2022-03-20 15:21:52,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:21:52,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1058431684] [2022-03-20 15:21:52,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:21:52,492 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 36 times [2022-03-20 15:21:52,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:21:52,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887902148] [2022-03-20 15:21:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:21:52,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:21:52,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:21:52,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310815647] [2022-03-20 15:21:52,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:21:52,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:21:52,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:21:52,501 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:21:52,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 15:21:52,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:21:52,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:21:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 15:21:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:21:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 48 proven. 161 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-03-20 15:21:56,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:22:00,636 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:22:06,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:22:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887902148] [2022-03-20 15:22:06,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:22:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310815647] [2022-03-20 15:22:06,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310815647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:22:06,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:22:06,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-20 15:22:06,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:22:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1058431684] [2022-03-20 15:22:06,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1058431684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:22:06,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:22:06,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 15:22:06,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506389045] [2022-03-20 15:22:06,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:22:06,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 15:22:06,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:22:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 15:22:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 15:22:06,135 INFO L87 Difference]: Start difference. First operand 1335 states and 1937 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 15:22:12,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:22:12,440 INFO L93 Difference]: Finished difference Result 1465 states and 2109 transitions. [2022-03-20 15:22:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 15:22:12,442 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 146 [2022-03-20 15:22:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:22:12,448 INFO L225 Difference]: With dead ends: 1465 [2022-03-20 15:22:12,448 INFO L226 Difference]: Without dead ends: 1462 [2022-03-20 15:22:12,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=403, Invalid=3019, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 15:22:12,449 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 109 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:22:12,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 1091 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1954 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-20 15:22:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-03-20 15:22:13,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1353. [2022-03-20 15:22:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 747 states have (on average 1.215528781793842) internal successors, (908), 767 states have internal predecessors, (908), 524 states have call successors, (524), 82 states have call predecessors, (524), 81 states have return successors, (522), 503 states have call predecessors, (522), 522 states have call successors, (522) [2022-03-20 15:22:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 1954 transitions. [2022-03-20 15:22:13,032 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 1954 transitions. Word has length 146 [2022-03-20 15:22:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:22:13,033 INFO L478 AbstractCegarLoop]: Abstraction has 1353 states and 1954 transitions. [2022-03-20 15:22:13,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 15:22:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 1954 transitions. [2022-03-20 15:22:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 15:22:13,034 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:22:13,035 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:22:13,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 15:22:13,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 15:22:13,235 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:22:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:22:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash 829249481, now seen corresponding path program 37 times [2022-03-20 15:22:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:22:13,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1969090908] [2022-03-20 15:22:13,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:22:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash 829249481, now seen corresponding path program 38 times [2022-03-20 15:22:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:22:13,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684697326] [2022-03-20 15:22:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:22:13,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:22:13,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:22:13,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208596978] [2022-03-20 15:22:13,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:22:13,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:22:13,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:22:13,246 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:22:13,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 15:22:13,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:22:13,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:22:13,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-20 15:22:13,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:22:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 142 proven. 118 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 15:22:14,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:22:15,407 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:22:17,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:22:17,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684697326] [2022-03-20 15:22:17,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:22:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208596978] [2022-03-20 15:22:17,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208596978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:22:17,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:22:17,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 15:22:17,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:22:17,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1969090908] [2022-03-20 15:22:17,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1969090908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:22:17,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:22:17,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 15:22:17,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271254097] [2022-03-20 15:22:17,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:22:17,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 15:22:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:22:17,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 15:22:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-20 15:22:17,985 INFO L87 Difference]: Start difference. First operand 1353 states and 1954 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 15:22:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:22:22,383 INFO L93 Difference]: Finished difference Result 1544 states and 2223 transitions. [2022-03-20 15:22:22,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 15:22:22,384 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 146 [2022-03-20 15:22:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:22:22,390 INFO L225 Difference]: With dead ends: 1544 [2022-03-20 15:22:22,390 INFO L226 Difference]: Without dead ends: 1541 [2022-03-20 15:22:22,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 15:22:22,391 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 102 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:22:22,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 935 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 15:22:22,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-03-20 15:22:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1486. [2022-03-20 15:22:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 820 states have (on average 1.2170731707317073) internal successors, (998), 843 states have internal predecessors, (998), 578 states have call successors, (578), 88 states have call predecessors, (578), 87 states have return successors, (576), 554 states have call predecessors, (576), 576 states have call successors, (576) [2022-03-20 15:22:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2152 transitions. [2022-03-20 15:22:23,035 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2152 transitions. Word has length 146 [2022-03-20 15:22:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:22:23,035 INFO L478 AbstractCegarLoop]: Abstraction has 1486 states and 2152 transitions. [2022-03-20 15:22:23,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-20 15:22:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2152 transitions. [2022-03-20 15:22:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 15:22:23,037 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:22:23,037 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:22:23,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-20 15:22:23,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 15:22:23,238 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:22:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:22:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1464953460, now seen corresponding path program 11 times [2022-03-20 15:22:23,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:22:23,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [585744756] [2022-03-20 15:22:23,239 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:22:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1464953460, now seen corresponding path program 12 times [2022-03-20 15:22:23,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:22:23,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224660483] [2022-03-20 15:22:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:22:23,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:22:23,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:22:23,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512904113] [2022-03-20 15:22:23,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:22:23,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:22:23,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:22:23,250 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:22:23,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 15:22:23,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:22:23,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:22:23,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 15:22:23,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:22:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 100 proven. 148 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-20 15:22:24,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:22:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 106 proven. 142 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-20 15:22:27,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:22:27,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224660483] [2022-03-20 15:22:27,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:22:27,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512904113] [2022-03-20 15:22:27,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512904113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:22:27,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:22:27,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2022-03-20 15:22:27,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:22:27,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [585744756] [2022-03-20 15:22:27,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [585744756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:22:27,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:22:27,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:22:27,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994982825] [2022-03-20 15:22:27,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:22:27,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:22:27,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:22:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:22:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:22:27,345 INFO L87 Difference]: Start difference. First operand 1486 states and 2152 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 15:22:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:22:29,299 INFO L93 Difference]: Finished difference Result 1582 states and 2286 transitions. [2022-03-20 15:22:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 15:22:29,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 149 [2022-03-20 15:22:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:22:29,305 INFO L225 Difference]: With dead ends: 1582 [2022-03-20 15:22:29,305 INFO L226 Difference]: Without dead ends: 1580 [2022-03-20 15:22:29,306 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 261 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 15:22:29,306 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 72 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 15:22:29,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 763 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 15:22:29,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-03-20 15:22:30,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1541. [2022-03-20 15:22:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 847 states have (on average 1.219598583234947) internal successors, (1033), 870 states have internal predecessors, (1033), 603 states have call successors, (603), 91 states have call predecessors, (603), 90 states have return successors, (601), 579 states have call predecessors, (601), 601 states have call successors, (601) [2022-03-20 15:22:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2237 transitions. [2022-03-20 15:22:30,043 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2237 transitions. Word has length 149 [2022-03-20 15:22:30,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:22:30,043 INFO L478 AbstractCegarLoop]: Abstraction has 1541 states and 2237 transitions. [2022-03-20 15:22:30,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 15:22:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2237 transitions. [2022-03-20 15:22:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 15:22:30,046 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:22:30,046 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:22:30,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 15:22:30,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 15:22:30,247 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:22:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:22:30,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1748446329, now seen corresponding path program 39 times [2022-03-20 15:22:30,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:22:30,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [53459690] [2022-03-20 15:22:30,248 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:22:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1748446329, now seen corresponding path program 40 times [2022-03-20 15:22:30,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:22:30,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294137711] [2022-03-20 15:22:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:22:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:22:30,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:22:30,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337913048] [2022-03-20 15:22:30,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:22:30,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:22:30,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:22:30,259 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:22:30,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 15:22:30,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:22:30,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:22:30,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-20 15:22:30,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:22:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 100 proven. 183 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 15:22:33,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:22:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 159 proven. 22 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-03-20 15:22:35,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:22:35,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294137711] [2022-03-20 15:22:35,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:22:35,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337913048] [2022-03-20 15:22:35,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337913048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:22:35,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:22:35,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 36 [2022-03-20 15:22:35,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:22:35,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [53459690] [2022-03-20 15:22:35,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [53459690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:22:35,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:22:35,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 15:22:35,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700545188] [2022-03-20 15:22:35,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:22:35,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 15:22:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:22:35,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 15:22:35,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:22:35,872 INFO L87 Difference]: Start difference. First operand 1541 states and 2237 transitions. Second operand has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 15:22:42,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:22:42,343 INFO L93 Difference]: Finished difference Result 1737 states and 2514 transitions. [2022-03-20 15:22:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 15:22:42,344 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 151 [2022-03-20 15:22:42,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:22:42,349 INFO L225 Difference]: With dead ends: 1737 [2022-03-20 15:22:42,349 INFO L226 Difference]: Without dead ends: 1734 [2022-03-20 15:22:42,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 15:22:42,351 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 113 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 15:22:42,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1300 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-20 15:22:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2022-03-20 15:22:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1615. [2022-03-20 15:22:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 890 states have (on average 1.2191011235955056) internal successors, (1085), 915 states have internal predecessors, (1085), 630 states have call successors, (630), 95 states have call predecessors, (630), 94 states have return successors, (628), 604 states have call predecessors, (628), 628 states have call successors, (628) [2022-03-20 15:22:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2343 transitions. [2022-03-20 15:22:43,023 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2343 transitions. Word has length 151 [2022-03-20 15:22:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:22:43,023 INFO L478 AbstractCegarLoop]: Abstraction has 1615 states and 2343 transitions. [2022-03-20 15:22:43,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 15:22:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2343 transitions. [2022-03-20 15:22:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 15:22:43,025 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:22:43,025 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1] [2022-03-20 15:22:43,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 15:22:43,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:22:43,227 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:22:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:22:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1293461113, now seen corresponding path program 41 times [2022-03-20 15:22:43,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:22:43,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1946752733] [2022-03-20 15:22:43,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:22:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1293461113, now seen corresponding path program 42 times [2022-03-20 15:22:43,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:22:43,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295952739] [2022-03-20 15:22:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:22:43,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:22:43,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:22:43,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189069543] [2022-03-20 15:22:43,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:22:43,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:22:43,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:22:43,242 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:22:43,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 15:22:43,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 15:22:43,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:22:43,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 15:22:43,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:22:45,362 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:22:45,366 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:22:45,388 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:22:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 152 proven. 182 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2022-03-20 15:22:50,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:22:51,281 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:22:52,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:22:52,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295952739] [2022-03-20 15:22:52,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:22:52,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189069543] [2022-03-20 15:22:52,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189069543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:22:52,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:22:52,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 15:22:52,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:22:52,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1946752733] [2022-03-20 15:22:52,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1946752733] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:22:52,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:22:52,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:22:52,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79278146] [2022-03-20 15:22:52,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:22:52,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:22:52,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:22:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:22:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:22:52,165 INFO L87 Difference]: Start difference. First operand 1615 states and 2343 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 15:22:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:22:54,479 INFO L93 Difference]: Finished difference Result 1650 states and 2383 transitions. [2022-03-20 15:22:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 15:22:54,480 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 7 states have call successors, (25) Word has length 155 [2022-03-20 15:22:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:22:54,485 INFO L225 Difference]: With dead ends: 1650 [2022-03-20 15:22:54,485 INFO L226 Difference]: Without dead ends: 1643 [2022-03-20 15:22:54,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:22:54,485 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 54 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:22:54,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 535 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 699 Invalid, 0 Unknown, 200 Unchecked, 1.2s Time] [2022-03-20 15:22:54,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2022-03-20 15:22:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1621. [2022-03-20 15:22:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 896 states have (on average 1.21875) internal successors, (1092), 921 states have internal predecessors, (1092), 630 states have call successors, (630), 95 states have call predecessors, (630), 94 states have return successors, (628), 604 states have call predecessors, (628), 628 states have call successors, (628) [2022-03-20 15:22:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2350 transitions. [2022-03-20 15:22:55,163 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2350 transitions. Word has length 155 [2022-03-20 15:22:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:22:55,163 INFO L478 AbstractCegarLoop]: Abstraction has 1621 states and 2350 transitions. [2022-03-20 15:22:55,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 15:22:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2350 transitions. [2022-03-20 15:22:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 15:22:55,165 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:22:55,165 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1] [2022-03-20 15:22:55,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 15:22:55,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:22:55,367 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:22:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:22:55,367 INFO L85 PathProgramCache]: Analyzing trace with hash -739148827, now seen corresponding path program 43 times [2022-03-20 15:22:55,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:22:55,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [456837296] [2022-03-20 15:22:55,367 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:22:55,367 INFO L85 PathProgramCache]: Analyzing trace with hash -739148827, now seen corresponding path program 44 times [2022-03-20 15:22:55,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:22:55,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341645595] [2022-03-20 15:22:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:22:55,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:22:55,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:22:55,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663498543] [2022-03-20 15:22:55,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:22:55,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:22:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:22:55,374 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:22:55,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 15:22:55,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:22:55,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:22:55,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 15:22:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates...