/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:15:59,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:15:59,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:15:59,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:15:59,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:15:59,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:15:59,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:15:59,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:15:59,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:15:59,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:15:59,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:15:59,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:15:59,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:15:59,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:15:59,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:15:59,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:15:59,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:15:59,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:15:59,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:15:59,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:15:59,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:15:59,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:15:59,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:15:59,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:15:59,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 18:15:59,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 18:15:59,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 18:15:59,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 18:15:59,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 18:15:59,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 18:15:59,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 18:15:59,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 18:15:59,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 18:15:59,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:15:59,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:15:59,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:15:59,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:15:59,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:15:59,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:15:59,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:15:59,875 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:15:59,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:15:59,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:15:59,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:15:59,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:15:59,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:15:59,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:15:59,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:15:59,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:15:59,877 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:15:59,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:15:59,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:15:59,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:15:59,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:15:59,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:15:59,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:15:59,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:15:59,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:15:59,878 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:15:59,878 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:16:00,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:16:00,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:16:00,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:16:00,098 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:16:00,099 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:16:00,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-02-23 18:16:00,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600123a43/627fa164eead48ea800dbcd20ebbac80/FLAG715ed6d1f [2022-02-23 18:16:00,453 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:16:00,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-02-23 18:16:00,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600123a43/627fa164eead48ea800dbcd20ebbac80/FLAG715ed6d1f [2022-02-23 18:16:00,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600123a43/627fa164eead48ea800dbcd20ebbac80 [2022-02-23 18:16:00,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:16:00,889 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:16:00,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:16:00,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:16:00,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:16:00,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:16:00" (1/1) ... [2022-02-23 18:16:00,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2ac7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:00, skipping insertion in model container [2022-02-23 18:16:00,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:16:00" (1/1) ... [2022-02-23 18:16:00,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:16:00,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:16:01,068 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/fermat1-ll_unwindbound50.c[535,548] [2022-02-23 18:16:01,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:16:01,102 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:16:01,112 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/fermat1-ll_unwindbound50.c[535,548] [2022-02-23 18:16:01,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:16:01,126 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:16:01,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:01 WrapperNode [2022-02-23 18:16:01,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:16:01,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:16:01,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:16:01,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:16:01,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:01" (1/1) ... [2022-02-23 18:16:01,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:01" (1/1) ... [2022-02-23 18:16:01,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:01" (1/1) ... [2022-02-23 18:16:01,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:01" (1/1) ... [2022-02-23 18:16:01,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:01" (1/1) ... [2022-02-23 18:16:01,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:01" (1/1) ... [2022-02-23 18:16:01,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:01" (1/1) ... [2022-02-23 18:16:01,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:16:01,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:16:01,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:16:01,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:16:01,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:01" (1/1) ... [2022-02-23 18:16:01,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:16:01,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:01,191 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 18:16:01,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 18:16:01,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:16:01,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:16:01,226 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:16:01,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:16:01,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:16:01,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:16:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:16:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:16:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:16:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:16:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 18:16:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:16:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:16:01,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:16:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:16:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:16:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:16:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:16:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:16:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:16:01,289 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:16:01,290 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:16:01,420 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:16:01,424 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:16:01,425 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-23 18:16:01,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:16:01 BoogieIcfgContainer [2022-02-23 18:16:01,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:16:01,426 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:16:01,426 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:16:01,427 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:16:01,429 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:16:01" (1/1) ... [2022-02-23 18:16:01,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:16:01 BasicIcfg [2022-02-23 18:16:01,446 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:16:01,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:16:01,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:16:01,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:16:01,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:16:00" (1/4) ... [2022-02-23 18:16:01,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e44b8f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:16:01, skipping insertion in model container [2022-02-23 18:16:01,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:16:01" (2/4) ... [2022-02-23 18:16:01,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e44b8f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:16:01, skipping insertion in model container [2022-02-23 18:16:01,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:16:01" (3/4) ... [2022-02-23 18:16:01,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e44b8f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:16:01, skipping insertion in model container [2022-02-23 18:16:01,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:16:01" (4/4) ... [2022-02-23 18:16:01,452 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.cJordan [2022-02-23 18:16:01,455 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:16:01,455 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:16:01,484 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:16:01,505 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 18:16:01,505 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:16:01,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 18:16:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 18:16:01,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:01,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:01,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:01,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:01,531 INFO L85 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2022-02-23 18:16:01,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:01,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155768450] [2022-02-23 18:16:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:01,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:01,624 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:01,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920020713] [2022-02-23 18:16:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:01,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:01,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:01,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:01,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 18:16:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-02-23 18:16:01,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 18:16:01,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:16:01,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:01,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155768450] [2022-02-23 18:16:01,776 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:01,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920020713] [2022-02-23 18:16:01,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920020713] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:16:01,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:16:01,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-23 18:16:01,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59375589] [2022-02-23 18:16:01,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:16:01,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-02-23 18:16:01,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:01,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-02-23 18:16:01,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-23 18:16:01,806 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:16:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:01,819 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-02-23 18:16:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-23 18:16:01,820 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-23 18:16:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:01,825 INFO L225 Difference]: With dead ends: 37 [2022-02-23 18:16:01,825 INFO L226 Difference]: Without dead ends: 32 [2022-02-23 18:16:01,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-23 18:16:01,830 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:01,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:16:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-23 18:16:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-23 18:16:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 18:16:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-02-23 18:16:01,858 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-02-23 18:16:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:01,858 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-02-23 18:16:01,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:16:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-02-23 18:16:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 18:16:01,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:01,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:01,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:02,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-02-23 18:16:02,081 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2022-02-23 18:16:02,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:02,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058268026] [2022-02-23 18:16:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:02,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:02,092 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:02,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765509233] [2022-02-23 18:16:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:02,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:02,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:02,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:02,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 18:16:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:02,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 18:16:02,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:02,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:16:02,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:02,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058268026] [2022-02-23 18:16:02,264 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:02,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765509233] [2022-02-23 18:16:02,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765509233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:16:02,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:16:02,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 18:16:02,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440782171] [2022-02-23 18:16:02,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:16:02,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 18:16:02,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 18:16:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:16:02,266 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:16:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:02,281 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-02-23 18:16:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 18:16:02,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 18:16:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:02,283 INFO L225 Difference]: With dead ends: 34 [2022-02-23 18:16:02,283 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 18:16:02,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:16:02,284 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:02,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:16:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 18:16:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-23 18:16:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 18:16:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-02-23 18:16:02,288 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-02-23 18:16:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:02,289 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-02-23 18:16:02,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:16:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-02-23 18:16:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 18:16:02,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:02,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:02,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:02,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-02-23 18:16:02,509 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:02,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:02,509 INFO L85 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2022-02-23 18:16:02,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:02,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720757221] [2022-02-23 18:16:02,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:02,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:02,521 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:02,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027091302] [2022-02-23 18:16:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:02,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:02,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:02,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:02,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 18:16:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:02,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 18:16:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:05,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:16:05,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:05,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720757221] [2022-02-23 18:16:05,091 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:05,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027091302] [2022-02-23 18:16:05,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027091302] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:16:05,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:16:05,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:16:05,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185397322] [2022-02-23 18:16:05,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:16:05,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:16:05,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:05,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:16:05,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:16:05,093 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 18:16:07,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:07,849 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-02-23 18:16:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:16:07,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-02-23 18:16:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:07,851 INFO L225 Difference]: With dead ends: 51 [2022-02-23 18:16:07,851 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 18:16:07,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:16:07,852 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:07,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-23 18:16:07,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 18:16:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-23 18:16:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 18:16:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-02-23 18:16:07,859 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-02-23 18:16:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:07,859 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-02-23 18:16:07,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 18:16:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-02-23 18:16:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 18:16:07,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:07,866 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-23 18:16:07,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:08,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:08,083 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2022-02-23 18:16:08,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:08,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784812005] [2022-02-23 18:16:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:08,098 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:08,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34214158] [2022-02-23 18:16:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:08,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:08,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:08,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:08,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 18:16:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:08,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 18:16:08,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:08,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:08,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:08,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784812005] [2022-02-23 18:16:08,383 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:08,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34214158] [2022-02-23 18:16:08,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34214158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:08,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:08,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-23 18:16:08,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234761639] [2022-02-23 18:16:08,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:08,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:16:08,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:08,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:16:08,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:16:08,384 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:16:08,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:08,467 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-02-23 18:16:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 18:16:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-02-23 18:16:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:08,469 INFO L225 Difference]: With dead ends: 55 [2022-02-23 18:16:08,469 INFO L226 Difference]: Without dead ends: 52 [2022-02-23 18:16:08,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-23 18:16:08,470 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:08,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 157 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:16:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-23 18:16:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-02-23 18:16:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 18:16:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-02-23 18:16:08,475 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-02-23 18:16:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:08,475 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-02-23 18:16:08,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:16:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-02-23 18:16:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-23 18:16:08,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:08,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:08,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:08,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:08,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2022-02-23 18:16:08,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:08,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579382660] [2022-02-23 18:16:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:08,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:08,704 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:08,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231752395] [2022-02-23 18:16:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:08,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:08,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:08,720 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:08,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 18:16:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:08,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:16:08,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:08,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:16:08,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:08,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579382660] [2022-02-23 18:16:08,874 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:08,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231752395] [2022-02-23 18:16:08,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231752395] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:16:08,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:16:08,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:16:08,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614531897] [2022-02-23 18:16:08,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:16:08,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:16:08,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:08,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:16:08,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:16:08,876 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 18:16:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:08,893 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-02-23 18:16:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:16:08,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-02-23 18:16:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:08,894 INFO L225 Difference]: With dead ends: 44 [2022-02-23 18:16:08,894 INFO L226 Difference]: Without dead ends: 44 [2022-02-23 18:16:08,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:16:08,895 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:08,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:16:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-23 18:16:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-23 18:16:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 18:16:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-02-23 18:16:08,899 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-02-23 18:16:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:08,899 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-02-23 18:16:08,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 18:16:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-02-23 18:16:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 18:16:08,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:08,900 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-02-23 18:16:08,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:09,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:09,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2022-02-23 18:16:09,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:09,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754101274] [2022-02-23 18:16:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:09,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:09,131 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:09,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415849879] [2022-02-23 18:16:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:09,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:09,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:09,134 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:09,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 18:16:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:09,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:16:09,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:09,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 18:16:09,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:09,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754101274] [2022-02-23 18:16:09,327 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:09,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415849879] [2022-02-23 18:16:09,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415849879] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:16:09,327 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:16:09,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-02-23 18:16:09,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95632836] [2022-02-23 18:16:09,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:16:09,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:16:09,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:09,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:16:09,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:16:09,328 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-23 18:16:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:09,355 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-02-23 18:16:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:16:09,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-02-23 18:16:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:09,357 INFO L225 Difference]: With dead ends: 53 [2022-02-23 18:16:09,357 INFO L226 Difference]: Without dead ends: 53 [2022-02-23 18:16:09,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:16:09,357 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:09,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:16:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-23 18:16:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-02-23 18:16:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 18:16:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-02-23 18:16:09,361 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-02-23 18:16:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:09,362 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-02-23 18:16:09,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-23 18:16:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-02-23 18:16:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-23 18:16:09,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:09,363 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2022-02-23 18:16:09,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:09,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:09,564 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:09,564 INFO L85 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2022-02-23 18:16:09,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:09,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766831284] [2022-02-23 18:16:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:09,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:09,571 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:09,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881808231] [2022-02-23 18:16:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:09,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:09,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:09,573 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:09,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 18:16:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:09,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:16:09,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:09,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 18:16:09,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:09,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766831284] [2022-02-23 18:16:09,759 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:09,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881808231] [2022-02-23 18:16:09,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881808231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:09,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:09,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 18:16:09,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121830976] [2022-02-23 18:16:09,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:09,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:16:09,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:09,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:16:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:16:09,760 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-02-23 18:16:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:09,849 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2022-02-23 18:16:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 18:16:09,849 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-02-23 18:16:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:09,850 INFO L225 Difference]: With dead ends: 108 [2022-02-23 18:16:09,850 INFO L226 Difference]: Without dead ends: 108 [2022-02-23 18:16:09,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:16:09,851 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 81 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:09,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 224 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:16:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-23 18:16:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-02-23 18:16:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 18:16:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2022-02-23 18:16:09,873 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 43 [2022-02-23 18:16:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:09,873 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2022-02-23 18:16:09,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-02-23 18:16:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2022-02-23 18:16:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 18:16:09,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:09,874 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:09,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:10,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:10,083 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2022-02-23 18:16:10,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:10,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878782707] [2022-02-23 18:16:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:10,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:10,090 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:10,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107598643] [2022-02-23 18:16:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:10,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:10,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:10,108 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:10,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 18:16:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:10,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 18:16:10,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 18:16:10,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:16:10,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:10,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878782707] [2022-02-23 18:16:10,229 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:10,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107598643] [2022-02-23 18:16:10,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107598643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:16:10,229 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:16:10,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 18:16:10,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933205727] [2022-02-23 18:16:10,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:16:10,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 18:16:10,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 18:16:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:16:10,230 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 18:16:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:10,262 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2022-02-23 18:16:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 18:16:10,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-02-23 18:16:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:10,264 INFO L225 Difference]: With dead ends: 119 [2022-02-23 18:16:10,264 INFO L226 Difference]: Without dead ends: 119 [2022-02-23 18:16:10,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:16:10,265 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 23 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:10,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 98 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:16:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-23 18:16:10,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-02-23 18:16:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 18:16:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-02-23 18:16:10,272 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 47 [2022-02-23 18:16:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:10,273 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-02-23 18:16:10,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 18:16:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-02-23 18:16:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-23 18:16:10,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:10,274 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-02-23 18:16:10,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:10,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-02-23 18:16:10,491 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2022-02-23 18:16:10,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:10,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781904317] [2022-02-23 18:16:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:10,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:10,511 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:10,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088869135] [2022-02-23 18:16:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:10,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:10,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:10,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:10,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 18:16:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:10,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 18:16:10,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:10,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 18:16:10,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:10,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781904317] [2022-02-23 18:16:10,840 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:10,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088869135] [2022-02-23 18:16:10,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088869135] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:10,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:10,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-23 18:16:10,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597223465] [2022-02-23 18:16:10,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:10,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 18:16:10,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:10,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 18:16:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:16:10,841 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-02-23 18:16:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:10,965 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2022-02-23 18:16:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 18:16:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-02-23 18:16:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:10,966 INFO L225 Difference]: With dead ends: 172 [2022-02-23 18:16:10,966 INFO L226 Difference]: Without dead ends: 172 [2022-02-23 18:16:10,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-02-23 18:16:10,967 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 121 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:10,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 205 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:16:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-23 18:16:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-02-23 18:16:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-23 18:16:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-02-23 18:16:10,975 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 49 [2022-02-23 18:16:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:10,975 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-02-23 18:16:10,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-02-23 18:16:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-02-23 18:16:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 18:16:10,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:10,976 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1, 1] [2022-02-23 18:16:10,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:11,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:11,193 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:11,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2022-02-23 18:16:11,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:11,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329024569] [2022-02-23 18:16:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:11,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:11,200 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:11,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625844165] [2022-02-23 18:16:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:11,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:11,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:11,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:11,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 18:16:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:11,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 18:16:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:11,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 18:16:11,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:11,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329024569] [2022-02-23 18:16:11,582 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:11,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625844165] [2022-02-23 18:16:11,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625844165] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:11,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:11,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 18:16:11,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914768178] [2022-02-23 18:16:11,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:11,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 18:16:11,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:11,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 18:16:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:16:11,584 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-23 18:16:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:11,753 INFO L93 Difference]: Finished difference Result 206 states and 267 transitions. [2022-02-23 18:16:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 18:16:11,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 55 [2022-02-23 18:16:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:11,755 INFO L225 Difference]: With dead ends: 206 [2022-02-23 18:16:11,755 INFO L226 Difference]: Without dead ends: 206 [2022-02-23 18:16:11,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-02-23 18:16:11,756 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 204 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:11,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 245 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:16:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-23 18:16:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-02-23 18:16:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 149 states have internal predecessors, (179), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-23 18:16:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2022-02-23 18:16:11,763 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 55 [2022-02-23 18:16:11,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:11,775 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2022-02-23 18:16:11,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-23 18:16:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2022-02-23 18:16:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 18:16:11,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:11,777 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:11,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:11,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 18:16:11,994 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash -725338187, now seen corresponding path program 1 times [2022-02-23 18:16:11,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:11,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117117649] [2022-02-23 18:16:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:11,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:12,002 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:12,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742805525] [2022-02-23 18:16:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:12,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:12,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:12,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:12,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 18:16:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:12,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 18:16:12,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-02-23 18:16:12,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-02-23 18:16:12,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:12,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117117649] [2022-02-23 18:16:12,401 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:12,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742805525] [2022-02-23 18:16:12,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742805525] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:12,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:12,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-02-23 18:16:12,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344446132] [2022-02-23 18:16:12,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:12,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 18:16:12,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 18:16:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:16:12,403 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-23 18:16:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:12,425 INFO L93 Difference]: Finished difference Result 381 states and 522 transitions. [2022-02-23 18:16:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:16:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-02-23 18:16:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:12,427 INFO L225 Difference]: With dead ends: 381 [2022-02-23 18:16:12,427 INFO L226 Difference]: Without dead ends: 359 [2022-02-23 18:16:12,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:16:12,428 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 17 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:12,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 162 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:16:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-23 18:16:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2022-02-23 18:16:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2666666666666666) internal successors, (323), 261 states have internal predecessors, (323), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-02-23 18:16:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 469 transitions. [2022-02-23 18:16:12,456 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 469 transitions. Word has length 91 [2022-02-23 18:16:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:12,456 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 469 transitions. [2022-02-23 18:16:12,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-23 18:16:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 469 transitions. [2022-02-23 18:16:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 18:16:12,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:12,458 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1] [2022-02-23 18:16:12,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:12,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 18:16:12,675 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1986043633, now seen corresponding path program 2 times [2022-02-23 18:16:12,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:12,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507206863] [2022-02-23 18:16:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:12,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:12,683 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:12,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807658314] [2022-02-23 18:16:12,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:16:12,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:12,684 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:12,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 18:16:12,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:16:12,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:12,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 18:16:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 18:16:12,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-02-23 18:16:13,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:13,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507206863] [2022-02-23 18:16:13,246 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:13,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807658314] [2022-02-23 18:16:13,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807658314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:13,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:13,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-02-23 18:16:13,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590988276] [2022-02-23 18:16:13,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:13,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 18:16:13,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:13,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 18:16:13,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-23 18:16:13,248 INFO L87 Difference]: Start difference. First operand 342 states and 469 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-02-23 18:16:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:13,690 INFO L93 Difference]: Finished difference Result 842 states and 1155 transitions. [2022-02-23 18:16:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-23 18:16:13,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) Word has length 91 [2022-02-23 18:16:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:13,694 INFO L225 Difference]: With dead ends: 842 [2022-02-23 18:16:13,694 INFO L226 Difference]: Without dead ends: 842 [2022-02-23 18:16:13,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-02-23 18:16:13,695 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 350 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:13,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 469 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:16:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-02-23 18:16:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 793. [2022-02-23 18:16:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 597 states have (on average 1.2680067001675042) internal successors, (757), 606 states have internal predecessors, (757), 177 states have call successors, (177), 20 states have call predecessors, (177), 18 states have return successors, (175), 166 states have call predecessors, (175), 175 states have call successors, (175) [2022-02-23 18:16:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1109 transitions. [2022-02-23 18:16:13,718 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1109 transitions. Word has length 91 [2022-02-23 18:16:13,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:13,718 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1109 transitions. [2022-02-23 18:16:13,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-02-23 18:16:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1109 transitions. [2022-02-23 18:16:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-23 18:16:13,720 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:13,720 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-02-23 18:16:13,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:13,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 18:16:13,936 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 1 times [2022-02-23 18:16:13,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:13,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888131878] [2022-02-23 18:16:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:13,944 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:13,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457526965] [2022-02-23 18:16:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:13,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:13,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:13,945 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:13,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 18:16:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:13,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 18:16:13,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:14,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-02-23 18:16:14,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:14,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888131878] [2022-02-23 18:16:14,517 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:14,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457526965] [2022-02-23 18:16:14,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457526965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:14,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:14,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-02-23 18:16:14,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697981630] [2022-02-23 18:16:14,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:14,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 18:16:14,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 18:16:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-23 18:16:14,519 INFO L87 Difference]: Start difference. First operand 793 states and 1109 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-02-23 18:16:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:15,058 INFO L93 Difference]: Finished difference Result 819 states and 1083 transitions. [2022-02-23 18:16:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-23 18:16:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 97 [2022-02-23 18:16:15,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:15,061 INFO L225 Difference]: With dead ends: 819 [2022-02-23 18:16:15,061 INFO L226 Difference]: Without dead ends: 795 [2022-02-23 18:16:15,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-02-23 18:16:15,062 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 697 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:15,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 528 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:16:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-02-23 18:16:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 740. [2022-02-23 18:16:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 553 states have (on average 1.2206148282097649) internal successors, (675), 557 states have internal predecessors, (675), 164 states have call successors, (164), 24 states have call predecessors, (164), 22 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-02-23 18:16:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1001 transitions. [2022-02-23 18:16:15,077 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1001 transitions. Word has length 97 [2022-02-23 18:16:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:15,077 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1001 transitions. [2022-02-23 18:16:15,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-02-23 18:16:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1001 transitions. [2022-02-23 18:16:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-23 18:16:15,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:15,079 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:15,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:15,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 18:16:15,295 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:15,295 INFO L85 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 1 times [2022-02-23 18:16:15,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:15,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071548471] [2022-02-23 18:16:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:15,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:15,305 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:15,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58245358] [2022-02-23 18:16:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:15,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:15,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:15,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:15,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 18:16:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:15,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 18:16:15,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:15,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-02-23 18:16:15,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:15,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071548471] [2022-02-23 18:16:15,849 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:15,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58245358] [2022-02-23 18:16:15,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58245358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:15,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:15,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-02-23 18:16:15,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804658812] [2022-02-23 18:16:15,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:15,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 18:16:15,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 18:16:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-23 18:16:15,850 INFO L87 Difference]: Start difference. First operand 740 states and 1001 transitions. Second operand has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-02-23 18:16:16,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:16,389 INFO L93 Difference]: Finished difference Result 845 states and 1130 transitions. [2022-02-23 18:16:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-23 18:16:16,390 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 103 [2022-02-23 18:16:16,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:16,392 INFO L225 Difference]: With dead ends: 845 [2022-02-23 18:16:16,392 INFO L226 Difference]: Without dead ends: 845 [2022-02-23 18:16:16,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2022-02-23 18:16:16,393 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 603 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:16,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 442 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:16:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-02-23 18:16:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 830. [2022-02-23 18:16:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 621 states have (on average 1.1996779388083736) internal successors, (745), 627 states have internal predecessors, (745), 184 states have call successors, (184), 26 states have call predecessors, (184), 24 states have return successors, (182), 176 states have call predecessors, (182), 182 states have call successors, (182) [2022-02-23 18:16:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1111 transitions. [2022-02-23 18:16:16,409 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1111 transitions. Word has length 103 [2022-02-23 18:16:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:16,409 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1111 transitions. [2022-02-23 18:16:16,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-02-23 18:16:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1111 transitions. [2022-02-23 18:16:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-02-23 18:16:16,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:16,412 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:16,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:16,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:16,629 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:16,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:16,629 INFO L85 PathProgramCache]: Analyzing trace with hash -872608014, now seen corresponding path program 3 times [2022-02-23 18:16:16,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:16,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174884790] [2022-02-23 18:16:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:16,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:16,637 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:16,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590862323] [2022-02-23 18:16:16,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:16:16,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:16,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:16,641 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:16,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 18:16:16,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 18:16:16,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:16,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 18:16:16,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-02-23 18:16:16,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:16:16,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:16,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174884790] [2022-02-23 18:16:16,933 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:16,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590862323] [2022-02-23 18:16:16,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590862323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:16:16,933 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:16:16,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:16:16,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502016975] [2022-02-23 18:16:16,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:16:16,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:16:16,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:16:16,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:16:16,937 INFO L87 Difference]: Start difference. First operand 830 states and 1111 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:16:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:16,999 INFO L93 Difference]: Finished difference Result 946 states and 1238 transitions. [2022-02-23 18:16:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:16:16,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 181 [2022-02-23 18:16:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:17,003 INFO L225 Difference]: With dead ends: 946 [2022-02-23 18:16:17,003 INFO L226 Difference]: Without dead ends: 896 [2022-02-23 18:16:17,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-23 18:16:17,005 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:17,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:16:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-02-23 18:16:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 861. [2022-02-23 18:16:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 645 states have (on average 1.1767441860465115) internal successors, (759), 652 states have internal predecessors, (759), 186 states have call successors, (186), 31 states have call predecessors, (186), 29 states have return successors, (184), 177 states have call predecessors, (184), 184 states have call successors, (184) [2022-02-23 18:16:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1129 transitions. [2022-02-23 18:16:17,030 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1129 transitions. Word has length 181 [2022-02-23 18:16:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:17,044 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1129 transitions. [2022-02-23 18:16:17,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:16:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1129 transitions. [2022-02-23 18:16:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-23 18:16:17,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:17,047 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:17,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:17,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 18:16:17,264 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:17,265 INFO L85 PathProgramCache]: Analyzing trace with hash 121372368, now seen corresponding path program 4 times [2022-02-23 18:16:17,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:17,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322419429] [2022-02-23 18:16:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:17,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:17,272 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:17,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630472125] [2022-02-23 18:16:17,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 18:16:17,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:17,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:17,292 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:17,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 18:16:17,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 18:16:17,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:17,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2022-02-23 18:16:17,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-02-23 18:16:17,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:16:17,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:17,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322419429] [2022-02-23 18:16:17,655 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:17,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630472125] [2022-02-23 18:16:17,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630472125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:16:17,655 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:16:17,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:16:17,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246129772] [2022-02-23 18:16:17,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:16:17,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:16:17,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:17,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:16:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:16:17,669 INFO L87 Difference]: Start difference. First operand 861 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-23 18:16:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:17,689 INFO L93 Difference]: Finished difference Result 1075 states and 1408 transitions. [2022-02-23 18:16:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:16:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 187 [2022-02-23 18:16:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:17,702 INFO L225 Difference]: With dead ends: 1075 [2022-02-23 18:16:17,702 INFO L226 Difference]: Without dead ends: 919 [2022-02-23 18:16:17,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:16:17,702 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:17,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:16:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-02-23 18:16:17,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 867. [2022-02-23 18:16:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 651 states have (on average 1.1751152073732718) internal successors, (765), 660 states have internal predecessors, (765), 186 states have call successors, (186), 31 states have call predecessors, (186), 29 states have return successors, (184), 175 states have call predecessors, (184), 184 states have call successors, (184) [2022-02-23 18:16:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1135 transitions. [2022-02-23 18:16:17,752 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1135 transitions. Word has length 187 [2022-02-23 18:16:17,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:17,753 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 1135 transitions. [2022-02-23 18:16:17,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-23 18:16:17,753 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1135 transitions. [2022-02-23 18:16:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-23 18:16:17,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:17,755 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 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] [2022-02-23 18:16:17,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:17,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 18:16:17,977 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:17,978 INFO L85 PathProgramCache]: Analyzing trace with hash 230455855, now seen corresponding path program 5 times [2022-02-23 18:16:17,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:17,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131807865] [2022-02-23 18:16:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:17,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:17,986 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:17,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097124953] [2022-02-23 18:16:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 18:16:17,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:17,999 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:18,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 18:16:18,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-23 18:16:18,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:18,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 18:16:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2022-02-23 18:16:18,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:16:18,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:18,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131807865] [2022-02-23 18:16:18,675 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:18,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097124953] [2022-02-23 18:16:18,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097124953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:16:18,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:16:18,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:16:18,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938726541] [2022-02-23 18:16:18,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:16:18,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:16:18,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:18,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:16:18,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:16:18,689 INFO L87 Difference]: Start difference. First operand 867 states and 1135 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:16:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:18,731 INFO L93 Difference]: Finished difference Result 839 states and 1096 transitions. [2022-02-23 18:16:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:16:18,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 187 [2022-02-23 18:16:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:18,733 INFO L225 Difference]: With dead ends: 839 [2022-02-23 18:16:18,733 INFO L226 Difference]: Without dead ends: 831 [2022-02-23 18:16:18,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:16:18,734 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:18,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 143 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:16:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-02-23 18:16:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 806. [2022-02-23 18:16:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 604 states have (on average 1.1688741721854305) internal successors, (706), 612 states have internal predecessors, (706), 177 states have call successors, (177), 26 states have call predecessors, (177), 24 states have return successors, (175), 167 states have call predecessors, (175), 175 states have call successors, (175) [2022-02-23 18:16:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1058 transitions. [2022-02-23 18:16:18,758 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1058 transitions. Word has length 187 [2022-02-23 18:16:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:18,759 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1058 transitions. [2022-02-23 18:16:18,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:16:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1058 transitions. [2022-02-23 18:16:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-23 18:16:18,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:18,762 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:18,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:18,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 18:16:18,968 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1521127760, now seen corresponding path program 6 times [2022-02-23 18:16:18,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:18,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128837926] [2022-02-23 18:16:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:18,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:18,979 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:18,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073684747] [2022-02-23 18:16:18,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 18:16:18,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:18,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:18,992 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:16:19,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-23 18:16:19,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-23 18:16:19,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:19,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 18:16:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2022-02-23 18:16:19,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:16:19,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:19,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128837926] [2022-02-23 18:16:19,438 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:19,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073684747] [2022-02-23 18:16:19,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073684747] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:16:19,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:16:19,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 18:16:19,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383328062] [2022-02-23 18:16:19,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:16:19,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 18:16:19,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:19,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 18:16:19,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:16:19,439 INFO L87 Difference]: Start difference. First operand 806 states and 1058 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:16:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:19,478 INFO L93 Difference]: Finished difference Result 811 states and 1059 transitions. [2022-02-23 18:16:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 18:16:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 187 [2022-02-23 18:16:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:19,483 INFO L225 Difference]: With dead ends: 811 [2022-02-23 18:16:19,483 INFO L226 Difference]: Without dead ends: 782 [2022-02-23 18:16:19,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:16:19,483 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:19,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 134 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:16:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-02-23 18:16:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 755. [2022-02-23 18:16:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 566 states have (on average 1.1625441696113075) internal successors, (658), 573 states have internal predecessors, (658), 164 states have call successors, (164), 26 states have call predecessors, (164), 24 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-02-23 18:16:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 984 transitions. [2022-02-23 18:16:19,496 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 984 transitions. Word has length 187 [2022-02-23 18:16:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:19,496 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 984 transitions. [2022-02-23 18:16:19,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:16:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 984 transitions. [2022-02-23 18:16:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-23 18:16:19,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:19,498 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 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] [2022-02-23 18:16:19,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:19,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 18:16:19,720 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 491630563, now seen corresponding path program 7 times [2022-02-23 18:16:19,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:19,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918229896] [2022-02-23 18:16:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:19,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:19,730 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:19,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968094355] [2022-02-23 18:16:19,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 18:16:19,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:19,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:19,736 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) [2022-02-23 18:16:19,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-23 18:16:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:16:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 18:16:19,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-02-23 18:16:20,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-02-23 18:16:20,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:20,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918229896] [2022-02-23 18:16:20,490 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:20,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968094355] [2022-02-23 18:16:20,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968094355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:20,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:20,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-02-23 18:16:20,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694203058] [2022-02-23 18:16:20,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:20,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:16:20,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:20,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:16:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:16:20,493 INFO L87 Difference]: Start difference. First operand 755 states and 984 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-02-23 18:16:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:21,028 INFO L93 Difference]: Finished difference Result 1523 states and 2012 transitions. [2022-02-23 18:16:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 18:16:21,029 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 187 [2022-02-23 18:16:21,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:21,033 INFO L225 Difference]: With dead ends: 1523 [2022-02-23 18:16:21,033 INFO L226 Difference]: Without dead ends: 1523 [2022-02-23 18:16:21,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-02-23 18:16:21,034 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 127 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:21,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 1289 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:16:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2022-02-23 18:16:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1314. [2022-02-23 18:16:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 986 states have (on average 1.1795131845841784) internal successors, (1163), 1002 states have internal predecessors, (1163), 303 states have call successors, (303), 26 states have call predecessors, (303), 24 states have return successors, (301), 285 states have call predecessors, (301), 301 states have call successors, (301) [2022-02-23 18:16:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1767 transitions. [2022-02-23 18:16:21,056 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1767 transitions. Word has length 187 [2022-02-23 18:16:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:21,056 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 1767 transitions. [2022-02-23 18:16:21,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-02-23 18:16:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1767 transitions. [2022-02-23 18:16:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-23 18:16:21,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:21,075 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 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] [2022-02-23 18:16:21,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:21,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:21,276 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:21,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1463727385, now seen corresponding path program 8 times [2022-02-23 18:16:21,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:21,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129546184] [2022-02-23 18:16:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:21,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:21,287 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:21,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90158059] [2022-02-23 18:16:21,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:16:21,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:21,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:21,288 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) [2022-02-23 18:16:21,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-23 18:16:21,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:16:21,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:21,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 18:16:21,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-02-23 18:16:21,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2022-02-23 18:16:22,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:22,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129546184] [2022-02-23 18:16:22,009 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:22,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90158059] [2022-02-23 18:16:22,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90158059] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:22,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:22,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 18:16:22,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772499894] [2022-02-23 18:16:22,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:22,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 18:16:22,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:22,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 18:16:22,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:16:22,010 INFO L87 Difference]: Start difference. First operand 1314 states and 1767 transitions. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-02-23 18:16:22,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:22,691 INFO L93 Difference]: Finished difference Result 2421 states and 3227 transitions. [2022-02-23 18:16:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-23 18:16:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) Word has length 187 [2022-02-23 18:16:22,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:22,698 INFO L225 Difference]: With dead ends: 2421 [2022-02-23 18:16:22,698 INFO L226 Difference]: Without dead ends: 2417 [2022-02-23 18:16:22,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2022-02-23 18:16:22,700 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 203 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:22,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 977 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:16:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-02-23 18:16:22,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1968. [2022-02-23 18:16:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1475 states have (on average 1.1627118644067798) internal successors, (1715), 1503 states have internal predecessors, (1715), 468 states have call successors, (468), 26 states have call predecessors, (468), 24 states have return successors, (466), 438 states have call predecessors, (466), 466 states have call successors, (466) [2022-02-23 18:16:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2649 transitions. [2022-02-23 18:16:22,747 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2649 transitions. Word has length 187 [2022-02-23 18:16:22,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:22,748 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2649 transitions. [2022-02-23 18:16:22,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-02-23 18:16:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2649 transitions. [2022-02-23 18:16:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-23 18:16:22,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:22,752 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 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] [2022-02-23 18:16:22,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:22,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:22,985 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash 656453859, now seen corresponding path program 9 times [2022-02-23 18:16:22,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:22,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523858333] [2022-02-23 18:16:22,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:22,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:22,997 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:22,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615635556] [2022-02-23 18:16:22,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:16:22,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:22,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:23,012 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) [2022-02-23 18:16:23,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-23 18:16:23,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-02-23 18:16:23,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:23,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 18:16:23,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-02-23 18:16:24,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-02-23 18:16:24,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:24,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523858333] [2022-02-23 18:16:24,512 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:24,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615635556] [2022-02-23 18:16:24,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615635556] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:24,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:24,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-02-23 18:16:24,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349795948] [2022-02-23 18:16:24,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:24,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 18:16:24,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 18:16:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-23 18:16:24,513 INFO L87 Difference]: Start difference. First operand 1968 states and 2649 transitions. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2022-02-23 18:16:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:26,083 INFO L93 Difference]: Finished difference Result 2993 states and 4017 transitions. [2022-02-23 18:16:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-23 18:16:26,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) Word has length 187 [2022-02-23 18:16:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:26,092 INFO L225 Difference]: With dead ends: 2993 [2022-02-23 18:16:26,092 INFO L226 Difference]: Without dead ends: 2993 [2022-02-23 18:16:26,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=507, Invalid=2573, Unknown=0, NotChecked=0, Total=3080 [2022-02-23 18:16:26,093 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 299 mSDsluCounter, 2417 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:26,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 2742 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-23 18:16:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-02-23 18:16:26,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2462. [2022-02-23 18:16:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 1845 states have (on average 1.1718157181571816) internal successors, (2162), 1887 states have internal predecessors, (2162), 592 states have call successors, (592), 26 states have call predecessors, (592), 24 states have return successors, (590), 548 states have call predecessors, (590), 590 states have call successors, (590) [2022-02-23 18:16:26,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3344 transitions. [2022-02-23 18:16:26,142 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3344 transitions. Word has length 187 [2022-02-23 18:16:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:26,142 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 3344 transitions. [2022-02-23 18:16:26,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2022-02-23 18:16:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3344 transitions. [2022-02-23 18:16:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-23 18:16:26,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:26,148 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 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] [2022-02-23 18:16:26,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:26,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:26,354 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:26,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1870351901, now seen corresponding path program 10 times [2022-02-23 18:16:26,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:26,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157958365] [2022-02-23 18:16:26,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:26,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:26,367 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:26,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407815119] [2022-02-23 18:16:26,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 18:16:26,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:26,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:26,384 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) [2022-02-23 18:16:26,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-23 18:16:26,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 18:16:26,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:26,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-23 18:16:26,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:27,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-02-23 18:16:27,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:27,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157958365] [2022-02-23 18:16:27,816 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:27,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407815119] [2022-02-23 18:16:27,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407815119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:27,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:27,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-02-23 18:16:27,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949689382] [2022-02-23 18:16:27,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:27,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-23 18:16:27,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:27,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-23 18:16:27,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-02-23 18:16:27,818 INFO L87 Difference]: Start difference. First operand 2462 states and 3344 transitions. Second operand has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-02-23 18:16:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:29,770 INFO L93 Difference]: Finished difference Result 9897 states and 14111 transitions. [2022-02-23 18:16:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-23 18:16:29,771 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) Word has length 187 [2022-02-23 18:16:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:29,866 INFO L225 Difference]: With dead ends: 9897 [2022-02-23 18:16:29,866 INFO L226 Difference]: Without dead ends: 9897 [2022-02-23 18:16:29,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2022-02-23 18:16:29,869 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1468 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:29,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 881 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 18:16:29,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9897 states. [2022-02-23 18:16:30,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9897 to 9645. [2022-02-23 18:16:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9645 states, 7245 states have (on average 1.2641821946169771) internal successors, (9159), 7308 states have internal predecessors, (9159), 2355 states have call successors, (2355), 46 states have call predecessors, (2355), 44 states have return successors, (2353), 2290 states have call predecessors, (2353), 2353 states have call successors, (2353) [2022-02-23 18:16:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9645 states to 9645 states and 13867 transitions. [2022-02-23 18:16:30,249 INFO L78 Accepts]: Start accepts. Automaton has 9645 states and 13867 transitions. Word has length 187 [2022-02-23 18:16:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:30,250 INFO L470 AbstractCegarLoop]: Abstraction has 9645 states and 13867 transitions. [2022-02-23 18:16:30,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-02-23 18:16:30,251 INFO L276 IsEmpty]: Start isEmpty. Operand 9645 states and 13867 transitions. [2022-02-23 18:16:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-02-23 18:16:30,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:30,259 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:30,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:30,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:30,488 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:30,488 INFO L85 PathProgramCache]: Analyzing trace with hash -517824918, now seen corresponding path program 2 times [2022-02-23 18:16:30,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:30,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148495728] [2022-02-23 18:16:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:30,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:30,495 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:30,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108271113] [2022-02-23 18:16:30,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:16:30,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:30,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:30,548 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) [2022-02-23 18:16:30,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-23 18:16:30,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:16:30,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:30,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-23 18:16:30,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:31,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-02-23 18:16:31,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:31,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148495728] [2022-02-23 18:16:31,879 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:31,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108271113] [2022-02-23 18:16:31,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108271113] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:31,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:31,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-02-23 18:16:31,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748895222] [2022-02-23 18:16:31,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:31,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-23 18:16:31,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:31,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-23 18:16:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-02-23 18:16:31,882 INFO L87 Difference]: Start difference. First operand 9645 states and 13867 transitions. Second operand has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2022-02-23 18:16:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:33,563 INFO L93 Difference]: Finished difference Result 7747 states and 10618 transitions. [2022-02-23 18:16:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-23 18:16:33,563 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) Word has length 193 [2022-02-23 18:16:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:33,579 INFO L225 Difference]: With dead ends: 7747 [2022-02-23 18:16:33,580 INFO L226 Difference]: Without dead ends: 7697 [2022-02-23 18:16:33,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2022-02-23 18:16:33,581 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 1640 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:33,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1640 Valid, 860 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1119 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-23 18:16:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2022-02-23 18:16:33,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 7470. [2022-02-23 18:16:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7470 states, 5600 states have (on average 1.1821428571428572) internal successors, (6620), 5644 states have internal predecessors, (6620), 1823 states have call successors, (1823), 48 states have call predecessors, (1823), 46 states have return successors, (1821), 1777 states have call predecessors, (1821), 1821 states have call successors, (1821) [2022-02-23 18:16:33,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7470 states to 7470 states and 10264 transitions. [2022-02-23 18:16:33,734 INFO L78 Accepts]: Start accepts. Automaton has 7470 states and 10264 transitions. Word has length 193 [2022-02-23 18:16:33,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:33,734 INFO L470 AbstractCegarLoop]: Abstraction has 7470 states and 10264 transitions. [2022-02-23 18:16:33,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2022-02-23 18:16:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7470 states and 10264 transitions. [2022-02-23 18:16:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-02-23 18:16:33,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:33,741 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:33,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:33,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:33,957 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:33,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1869519853, now seen corresponding path program 2 times [2022-02-23 18:16:33,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:33,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793643164] [2022-02-23 18:16:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:33,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:33,965 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:33,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585198137] [2022-02-23 18:16:33,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:16:33,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:33,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:33,969 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) [2022-02-23 18:16:33,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-23 18:16:34,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:16:34,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:34,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-23 18:16:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:16:34,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-02-23 18:16:35,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:35,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793643164] [2022-02-23 18:16:35,269 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:35,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585198137] [2022-02-23 18:16:35,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585198137] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:35,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:35,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-02-23 18:16:35,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611733334] [2022-02-23 18:16:35,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:35,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-23 18:16:35,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-23 18:16:35,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 18:16:35,271 INFO L87 Difference]: Start difference. First operand 7470 states and 10264 transitions. Second operand has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-02-23 18:16:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:16:37,266 INFO L93 Difference]: Finished difference Result 8071 states and 10893 transitions. [2022-02-23 18:16:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-23 18:16:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 199 [2022-02-23 18:16:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:16:37,279 INFO L225 Difference]: With dead ends: 8071 [2022-02-23 18:16:37,279 INFO L226 Difference]: Without dead ends: 7927 [2022-02-23 18:16:37,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2022-02-23 18:16:37,281 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 1813 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 1243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1243 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:16:37,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1813 Valid, 807 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1243 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 18:16:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2022-02-23 18:16:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7220. [2022-02-23 18:16:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7220 states, 5413 states have (on average 1.1211897284315537) internal successors, (6069), 5457 states have internal predecessors, (6069), 1758 states have call successors, (1758), 50 states have call predecessors, (1758), 48 states have return successors, (1756), 1712 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-02-23 18:16:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7220 states to 7220 states and 9583 transitions. [2022-02-23 18:16:37,442 INFO L78 Accepts]: Start accepts. Automaton has 7220 states and 9583 transitions. Word has length 199 [2022-02-23 18:16:37,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:16:37,442 INFO L470 AbstractCegarLoop]: Abstraction has 7220 states and 9583 transitions. [2022-02-23 18:16:37,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-02-23 18:16:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7220 states and 9583 transitions. [2022-02-23 18:16:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-02-23 18:16:37,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:16:37,480 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:16:37,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-23 18:16:37,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:37,705 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:16:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:16:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1162964928, now seen corresponding path program 11 times [2022-02-23 18:16:37,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:16:37,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221879566] [2022-02-23 18:16:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:16:37,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:16:37,732 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:16:37,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593531301] [2022-02-23 18:16:37,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 18:16:37,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:16:37,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:16:37,734 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) [2022-02-23 18:16:37,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-23 18:16:38,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-02-23 18:16:38,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:16:38,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-23 18:16:38,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:17:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 480 proven. 984 refuted. 8 times theorem prover too weak. 3800 trivial. 0 not checked. [2022-02-23 18:17:12,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:23:51,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:23:51,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221879566] [2022-02-23 18:23:51,225 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:23:51,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593531301] [2022-02-23 18:23:51,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593531301] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:23:51,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:23:51,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-02-23 18:23:51,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090662407] [2022-02-23 18:23:51,225 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:23:51,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 18:23:51,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:23:51,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 18:23:51,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=848, Unknown=14, NotChecked=0, Total=1122 [2022-02-23 18:23:51,226 INFO L87 Difference]: Start difference. First operand 7220 states and 9583 transitions. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) [2022-02-23 18:24:38,786 WARN L232 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 58 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:24:49,519 WARN L232 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 56 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:25:08,133 WARN L232 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 77 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:25:30,247 WARN L232 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 61 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:26:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:26:04,198 INFO L93 Difference]: Finished difference Result 15084 states and 20218 transitions. [2022-02-23 18:26:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-23 18:26:04,198 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) Word has length 379 [2022-02-23 18:26:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:26:04,220 INFO L225 Difference]: With dead ends: 15084 [2022-02-23 18:26:04,220 INFO L226 Difference]: Without dead ends: 15084 [2022-02-23 18:26:04,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 634 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 167.8s TimeCoverageRelationStatistics Valid=872, Invalid=2874, Unknown=36, NotChecked=0, Total=3782 [2022-02-23 18:26:04,221 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 300 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 3507 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1069 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 18:26:04,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 3507 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 884 Invalid, 0 Unknown, 1069 Unchecked, 0.8s Time] [2022-02-23 18:26:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15084 states. [2022-02-23 18:26:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15084 to 14181. [2022-02-23 18:26:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14181 states, 10637 states have (on average 1.1329322177305632) internal successors, (12051), 10738 states have internal predecessors, (12051), 3495 states have call successors, (3495), 50 states have call predecessors, (3495), 48 states have return successors, (3493), 3392 states have call predecessors, (3493), 3493 states have call successors, (3493) [2022-02-23 18:26:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14181 states to 14181 states and 19039 transitions. [2022-02-23 18:26:04,498 INFO L78 Accepts]: Start accepts. Automaton has 14181 states and 19039 transitions. Word has length 379 [2022-02-23 18:26:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:26:04,498 INFO L470 AbstractCegarLoop]: Abstraction has 14181 states and 19039 transitions. [2022-02-23 18:26:04,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) [2022-02-23 18:26:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 14181 states and 19039 transitions. [2022-02-23 18:26:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-02-23 18:26:04,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:26:04,533 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:26:04,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-23 18:26:04,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-23 18:26:04,751 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:26:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:26:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1363840832, now seen corresponding path program 12 times [2022-02-23 18:26:04,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:26:04,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704843934] [2022-02-23 18:26:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:26:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:26:04,765 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:26:04,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133146356] [2022-02-23 18:26:04,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 18:26:04,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:26:04,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:26:04,780 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) [2022-02-23 18:26:04,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-23 18:26:18,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-02-23 18:26:18,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:26:18,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 67 conjunts are in the unsatisfiable core [2022-02-23 18:26:18,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:28:55,503 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod c_main_~A~0 2) 1) (exists ((v_main_~v~0_122 Int)) (let ((.cse0 (* v_main_~v~0_122 v_main_~v~0_122)) (.cse1 (* (- 1) c_main_~u~0 c_main_~u~0)) (.cse2 (* c_main_~u~0 2))) (let ((.cse3 (div (+ .cse0 (* (- 2) v_main_~v~0_122) .cse1 .cse2) (- 4)))) (and (= (mod (+ .cse0 (* 2 v_main_~v~0_122) .cse1 .cse2) 4) 0) (< (+ c_main_~A~0 c_main_~u~0) (+ .cse3 v_main_~v~0_122)) (not (< .cse3 c_main_~A~0)) (< 3 v_main_~v~0_122))))) (< 2 (+ c_main_~v~0 c_main_~r~0)) (exists ((aux_div_aux_mod_v_main_~u~0_89_42_77 Int) (v_main_~u~0_90 Int) (aux_div_aux_mod_aux_mod_v_main_~u~0_89_42_77_44 Int) (aux_div_v_main_~u~0_89_42 Int)) (let ((.cse5 (* 2 aux_div_aux_mod_aux_mod_v_main_~u~0_89_42_77_44))) (let ((.cse6 (div (+ 3 (* (- 1) v_main_~u~0_90 v_main_~u~0_90) (* v_main_~u~0_90 2)) (- 4))) (.cse7 (+ (* 2 aux_div_v_main_~u~0_89_42) .cse5)) (.cse4 (* 2 aux_div_aux_mod_v_main_~u~0_89_42_77))) (and (<= (+ 3 .cse4) (+ v_main_~u~0_90 .cse5)) (<= 0 .cse5) (< c_main_~A~0 .cse6) (<= (+ .cse6 .cse5) (+ (* aux_div_v_main_~u~0_89_42 aux_div_v_main_~u~0_89_42) .cse4)) (< (* aux_div_aux_mod_v_main_~u~0_89_42_77 aux_div_aux_mod_v_main_~u~0_89_42_77) c_main_~A~0) (<= (+ v_main_~u~0_90 .cse6) (+ c_main_~A~0 8)) (< .cse5 2) (<= .cse4 .cse7) (< .cse7 (+ 2 .cse4))))))) is different from false [2022-02-23 18:29:27,659 WARN L232 SmtUtils]: Spent 7.61s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:30:22,165 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~v~0 Int) (aux_div_aux_mod_v_main_~u~0_89_42_77 Int) (v_main_~u~0_90 Int) (v_main_~v~0_122 Int) (aux_div_aux_mod_aux_mod_v_main_~u~0_89_42_77_44 Int) (aux_div_main_~A~0_17 Int) (aux_div_v_main_~u~0_89_42 Int) (main_~u~0 Int)) (let ((.cse3 (* 2 aux_div_aux_mod_aux_mod_v_main_~u~0_89_42_77_44)) (.cse11 (* main_~v~0 main_~v~0)) (.cse4 (* 2 aux_div_main_~A~0_17)) (.cse8 (* v_main_~v~0_122 v_main_~v~0_122)) (.cse12 (* (- 1) main_~u~0 main_~u~0)) (.cse13 (* main_~u~0 6))) (let ((.cse1 (div (+ 3 (* (- 1) v_main_~u~0_90 v_main_~u~0_90) (* v_main_~u~0_90 2)) (- 4))) (.cse5 (div (+ .cse8 .cse12 (* (- 2) v_main_~v~0_122) .cse13 (- 8)) (- 4))) (.cse0 (+ .cse4 1)) (.cse6 (div (+ (* main_~v~0 (- 6)) .cse12 .cse11 .cse13) (- 4))) (.cse9 (* main_~u~0 2)) (.cse7 (+ (* 2 aux_div_v_main_~u~0_89_42) .cse3)) (.cse2 (* 2 aux_div_aux_mod_v_main_~u~0_89_42_77))) (and (< .cse0 .cse1) (<= (+ 3 .cse2) (+ v_main_~u~0_90 .cse3)) (<= 0 .cse3) (<= (+ v_main_~u~0_90 .cse1) (+ 9 .cse4)) (< (+ main_~u~0 .cse4) (+ .cse5 v_main_~v~0_122 1)) (<= (+ .cse1 .cse3) (+ (* aux_div_v_main_~u~0_89_42 aux_div_v_main_~u~0_89_42) .cse2)) (<= .cse0 .cse5) (< .cse6 .cse0) (< 3 v_main_~v~0_122) (< .cse3 2) (< (* aux_div_aux_mod_v_main_~u~0_89_42_77 aux_div_aux_mod_v_main_~u~0_89_42_77) .cse0) (<= .cse2 .cse7) (= (mod (+ .cse8 (* 2 v_main_~v~0_122) .cse9 (let ((.cse10 (+ (- 2) main_~u~0))) (* (- 1) .cse10 .cse10))) 4) 0) (< (+ 5 .cse4) (+ main_~v~0 .cse6)) (= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* aux_div_main_~A~0_17 8) (* c_main_~r~0 4) .cse11 .cse9 4)) (< .cse7 (+ 2 .cse2)))))) is different from true [2022-02-23 18:30:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 902 proven. 741 refuted. 71 times theorem prover too weak. 3424 trivial. 134 not checked. [2022-02-23 18:30:22,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:30:33,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:30:33,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704843934] [2022-02-23 18:30:33,651 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:30:33,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133146356] [2022-02-23 18:30:33,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133146356] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:30:33,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:30:33,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-02-23 18:30:33,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336860977] [2022-02-23 18:30:33,651 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:30:33,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 18:30:33,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:30:33,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 18:30:33,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=769, Unknown=38, NotChecked=118, Total=1056 [2022-02-23 18:30:33,652 INFO L87 Difference]: Start difference. First operand 14181 states and 19039 transitions. Second operand has 25 states, 25 states have (on average 4.4) internal successors, (110), 22 states have internal predecessors, (110), 18 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 17 states have call predecessors, (30), 17 states have call successors, (30) [2022-02-23 18:30:36,205 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 []