/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 22:32:15,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 22:32:15,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 22:32:15,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 22:32:15,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 22:32:15,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 22:32:15,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 22:32:15,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 22:32:15,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 22:32:15,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 22:32:15,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 22:32:15,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 22:32:15,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 22:32:15,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 22:32:15,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 22:32:15,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 22:32:15,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 22:32:15,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 22:32:15,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 22:32:15,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 22:32:15,781 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 22:32:15,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 22:32:15,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 22:32:15,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 22:32:15,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 22:32:15,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 22:32:15,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 22:32:15,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 22:32:15,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 22:32:15,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 22:32:15,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 22:32:15,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 22:32:15,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 22:32:15,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 22:32:15,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 22:32:15,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 22:32:15,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 22:32:15,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 22:32:15,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 22:32:15,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 22:32:15,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 22:32:15,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 22:32:15,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 22:32:15,804 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 22:32:15,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 22:32:15,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 22:32:15,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 22:32:15,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 22:32:15,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 22:32:15,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 22:32:15,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 22:32:15,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 22:32:15,806 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 22:32:15,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 22:32:15,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 22:32:15,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 22:32:15,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 22:32:15,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 22:32:15,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:32:15,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 22:32:15,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 22:32:15,806 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 22:32:15,807 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 22:32:15,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 22:32:15,807 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 22:32:15,807 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 22:32:15,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 22:32:15,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 22:32:15,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 22:32:15,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 22:32:15,977 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 22:32:15,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-04-06 22:32:16,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae96d2448/b2f63a00377e43edb00b7a72624976c3/FLAG1624e4c9c [2022-04-06 22:32:16,384 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 22:32:16,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-04-06 22:32:16,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae96d2448/b2f63a00377e43edb00b7a72624976c3/FLAG1624e4c9c [2022-04-06 22:32:16,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae96d2448/b2f63a00377e43edb00b7a72624976c3 [2022-04-06 22:32:16,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 22:32:16,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 22:32:16,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 22:32:16,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 22:32:16,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 22:32:16,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:32:16" (1/1) ... [2022-04-06 22:32:16,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204163d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16, skipping insertion in model container [2022-04-06 22:32:16,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:32:16" (1/1) ... [2022-04-06 22:32:16,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 22:32:16,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 22:32:16,563 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-04-06 22:32:16,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:32:16,587 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 22:32:16,594 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-04-06 22:32:16,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:32:16,612 INFO L208 MainTranslator]: Completed translation [2022-04-06 22:32:16,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16 WrapperNode [2022-04-06 22:32:16,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 22:32:16,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 22:32:16,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 22:32:16,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 22:32:16,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16" (1/1) ... [2022-04-06 22:32:16,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16" (1/1) ... [2022-04-06 22:32:16,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16" (1/1) ... [2022-04-06 22:32:16,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16" (1/1) ... [2022-04-06 22:32:16,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16" (1/1) ... [2022-04-06 22:32:16,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16" (1/1) ... [2022-04-06 22:32:16,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16" (1/1) ... [2022-04-06 22:32:16,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 22:32:16,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 22:32:16,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 22:32:16,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 22:32:16,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16" (1/1) ... [2022-04-06 22:32:16,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:32:16,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:16,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 22:32:16,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 22:32:16,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 22:32:16,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 22:32:16,683 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 22:32:16,683 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 22:32:16,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 22:32:16,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 22:32:16,683 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 22:32:16,683 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 22:32:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 22:32:16,724 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 22:32:16,725 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 22:32:16,819 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 22:32:16,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 22:32:16,823 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 22:32:16,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:32:16 BoogieIcfgContainer [2022-04-06 22:32:16,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 22:32:16,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 22:32:16,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 22:32:16,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 22:32:16,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:32:16" (1/3) ... [2022-04-06 22:32:16,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76239210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:32:16, skipping insertion in model container [2022-04-06 22:32:16,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:32:16" (2/3) ... [2022-04-06 22:32:16,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76239210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:32:16, skipping insertion in model container [2022-04-06 22:32:16,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:32:16" (3/3) ... [2022-04-06 22:32:16,829 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2022-04-06 22:32:16,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 22:32:16,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 22:32:16,859 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 22:32:16,864 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 22:32:16,864 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 22:32:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 22:32:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 22:32:16,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:16,879 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:16,879 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-04-06 22:32:16,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:16,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2099679007] [2022-04-06 22:32:16,894 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:16,895 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-04-06 22:32:16,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:16,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74949036] [2022-04-06 22:32:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:16,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:17,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 22:32:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:17,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 22:32:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:17,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 22:32:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:17,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 22:32:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:17,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 22:32:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:17,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 22:32:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:17,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 22:32:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:32:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 22:32:17,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:17,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74949036] [2022-04-06 22:32:17,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74949036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:17,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:17,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:32:17,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:17,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2099679007] [2022-04-06 22:32:17,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2099679007] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:17,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:17,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:32:17,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889500821] [2022-04-06 22:32:17,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:17,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 22:32:17,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:17,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 22:32:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:32:17,163 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 22:32:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:17,265 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-04-06 22:32:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 22:32:17,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-06 22:32:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:17,271 INFO L225 Difference]: With dead ends: 73 [2022-04-06 22:32:17,271 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 22:32:17,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:32:17,276 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:17,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 22:32:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 22:32:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 22:32:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-04-06 22:32:17,304 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-04-06 22:32:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:17,304 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-04-06 22:32:17,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 22:32:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-04-06 22:32:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 22:32:17,306 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:17,306 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:17,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 22:32:17,306 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-04-06 22:32:17,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:17,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [946964100] [2022-04-06 22:32:17,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-04-06 22:32:17,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:17,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696076348] [2022-04-06 22:32:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:17,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:17,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:17,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233524214] [2022-04-06 22:32:17,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:17,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:17,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:17,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:17,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 22:32:17,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:17,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:32:17,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 22:32:17,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 22:32:17,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:17,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696076348] [2022-04-06 22:32:17,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:17,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233524214] [2022-04-06 22:32:17,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233524214] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:17,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:17,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 22:32:17,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:17,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [946964100] [2022-04-06 22:32:17,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [946964100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:17,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:17,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:32:17,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604248342] [2022-04-06 22:32:17,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:17,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:32:17,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:17,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:32:17,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:32:17,727 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 22:32:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:17,834 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-04-06 22:32:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:32:17,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-04-06 22:32:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:17,837 INFO L225 Difference]: With dead ends: 52 [2022-04-06 22:32:17,837 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 22:32:17,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:17,839 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:17,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 128 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 22:32:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-04-06 22:32:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 22:32:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-04-06 22:32:17,871 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-04-06 22:32:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:17,871 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-04-06 22:32:17,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 22:32:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-04-06 22:32:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 22:32:17,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:17,872 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:17,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:18,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:18,092 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-04-06 22:32:18,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:18,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467637469] [2022-04-06 22:32:18,093 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:18,093 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-04-06 22:32:18,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:18,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234288477] [2022-04-06 22:32:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:18,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:18,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:18,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980254711] [2022-04-06 22:32:18,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:18,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:18,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:18,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:18,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 22:32:18,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 22:32:18,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:18,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 22:32:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 22:32:18,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:32:18,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:18,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234288477] [2022-04-06 22:32:18,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:18,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980254711] [2022-04-06 22:32:18,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980254711] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:18,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:18,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:18,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:18,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467637469] [2022-04-06 22:32:18,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467637469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:18,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:18,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:18,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361207225] [2022-04-06 22:32:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:18,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:18,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:32:18,230 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 22:32:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:18,265 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-04-06 22:32:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:32:18,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-04-06 22:32:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:18,267 INFO L225 Difference]: With dead ends: 50 [2022-04-06 22:32:18,267 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 22:32:18,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:32:18,268 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:18,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 154 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 22:32:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-04-06 22:32:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 22:32:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-04-06 22:32:18,275 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-04-06 22:32:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:18,275 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-04-06 22:32:18,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 22:32:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-04-06 22:32:18,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 22:32:18,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:18,276 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:18,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:18,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 22:32:18,489 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:18,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:18,489 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-04-06 22:32:18,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:18,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [513995077] [2022-04-06 22:32:18,490 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-04-06 22:32:18,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:18,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259706964] [2022-04-06 22:32:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:18,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:18,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:18,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061270797] [2022-04-06 22:32:18,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:18,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:18,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:18,505 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:18,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 22:32:18,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:18,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:18,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:32:18,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 22:32:18,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:32:18,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:18,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259706964] [2022-04-06 22:32:18,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:18,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061270797] [2022-04-06 22:32:18,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061270797] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:18,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:18,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:18,654 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:18,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [513995077] [2022-04-06 22:32:18,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [513995077] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:18,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:18,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:18,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218219290] [2022-04-06 22:32:18,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:18,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:18,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:18,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:18,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:32:18,655 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 22:32:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:18,687 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-04-06 22:32:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:32:18,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-04-06 22:32:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:18,689 INFO L225 Difference]: With dead ends: 58 [2022-04-06 22:32:18,689 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 22:32:18,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:32:18,690 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:18,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 161 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 22:32:18,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 22:32:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 22:32:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-04-06 22:32:18,698 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-04-06 22:32:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:18,698 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-04-06 22:32:18,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 22:32:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-04-06 22:32:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 22:32:18,699 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:18,699 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:18,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:18,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:18,916 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-04-06 22:32:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:18,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2054876586] [2022-04-06 22:32:18,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-04-06 22:32:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:18,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344623440] [2022-04-06 22:32:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:18,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:18,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274570104] [2022-04-06 22:32:18,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:18,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:18,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:18,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:18,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 22:32:18,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:18,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:18,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:32:18,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 22:32:19,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:32:19,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344623440] [2022-04-06 22:32:19,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274570104] [2022-04-06 22:32:19,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274570104] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:19,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:19,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:19,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:19,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2054876586] [2022-04-06 22:32:19,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2054876586] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:19,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:19,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789109207] [2022-04-06 22:32:19,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:19,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:19,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:32:19,086 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 22:32:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:19,132 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-04-06 22:32:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:32:19,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-04-06 22:32:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:19,133 INFO L225 Difference]: With dead ends: 62 [2022-04-06 22:32:19,133 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 22:32:19,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:32:19,135 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:19,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 151 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:19,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 22:32:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-06 22:32:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 22:32:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-04-06 22:32:19,149 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-04-06 22:32:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:19,149 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-04-06 22:32:19,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 22:32:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-04-06 22:32:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 22:32:19,153 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:19,154 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:19,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:19,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:19,367 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-04-06 22:32:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:19,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [261430354] [2022-04-06 22:32:19,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-04-06 22:32:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:19,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758060842] [2022-04-06 22:32:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:19,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:19,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:19,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53179793] [2022-04-06 22:32:19,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:19,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:19,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:19,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:19,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 22:32:19,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:19,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:19,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 22:32:19,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 22:32:19,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:19,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:19,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758060842] [2022-04-06 22:32:19,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:19,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53179793] [2022-04-06 22:32:19,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53179793] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:19,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:19,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 22:32:19,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:19,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [261430354] [2022-04-06 22:32:19,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [261430354] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:19,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:19,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:19,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474510156] [2022-04-06 22:32:19,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:19,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:19,685 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 22:32:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:19,773 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-04-06 22:32:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:32:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-04-06 22:32:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:19,775 INFO L225 Difference]: With dead ends: 66 [2022-04-06 22:32:19,775 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 22:32:19,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:32:19,776 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:19,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 164 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:19,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 22:32:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 22:32:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 22:32:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-04-06 22:32:19,786 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-04-06 22:32:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:19,786 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-04-06 22:32:19,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 22:32:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-04-06 22:32:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 22:32:19,787 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:19,787 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:19,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:20,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:20,004 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-04-06 22:32:20,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:20,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [980338070] [2022-04-06 22:32:20,004 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:20,005 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-04-06 22:32:20,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:20,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758067699] [2022-04-06 22:32:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:20,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:20,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:20,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856945604] [2022-04-06 22:32:20,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:20,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:20,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:20,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:20,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 22:32:20,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:20,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:20,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 22:32:20,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 22:32:20,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-04-06 22:32:20,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:20,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758067699] [2022-04-06 22:32:20,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:20,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856945604] [2022-04-06 22:32:20,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856945604] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:20,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:20,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 22:32:20,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:20,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [980338070] [2022-04-06 22:32:20,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [980338070] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:20,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:20,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:20,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057770099] [2022-04-06 22:32:20,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:20,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:20,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:20,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:20,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:32:20,284 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 22:32:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:20,321 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-04-06 22:32:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:32:20,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-04-06 22:32:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:20,322 INFO L225 Difference]: With dead ends: 69 [2022-04-06 22:32:20,322 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 22:32:20,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:32:20,323 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:20,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 137 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 22:32:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-04-06 22:32:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 22:32:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-04-06 22:32:20,335 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-04-06 22:32:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:20,336 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-04-06 22:32:20,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 22:32:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-04-06 22:32:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 22:32:20,337 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:20,337 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:20,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:20,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:20,552 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-04-06 22:32:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:20,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [8049438] [2022-04-06 22:32:20,553 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-04-06 22:32:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:20,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831968903] [2022-04-06 22:32:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:20,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:20,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939898391] [2022-04-06 22:32:20,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:20,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:20,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:20,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:20,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 22:32:20,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:20,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:20,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:32:20,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 22:32:20,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 22:32:20,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:20,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831968903] [2022-04-06 22:32:20,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:20,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939898391] [2022-04-06 22:32:20,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939898391] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:20,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:20,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 22:32:20,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:20,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [8049438] [2022-04-06 22:32:20,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [8049438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:20,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:20,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:32:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012246117] [2022-04-06 22:32:20,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:20,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:32:20,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:32:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:20,843 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 22:32:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:21,019 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-04-06 22:32:21,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:32:21,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-04-06 22:32:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:21,023 INFO L225 Difference]: With dead ends: 106 [2022-04-06 22:32:21,023 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 22:32:21,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:21,024 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:21,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 259 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:21,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 22:32:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-04-06 22:32:21,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 22:32:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-04-06 22:32:21,045 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-04-06 22:32:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:21,045 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-04-06 22:32:21,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 22:32:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-04-06 22:32:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 22:32:21,046 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:21,047 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:21,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:21,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:21,263 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-04-06 22:32:21,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2126195695] [2022-04-06 22:32:21,264 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-04-06 22:32:21,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:21,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111298735] [2022-04-06 22:32:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:21,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:21,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:21,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606096876] [2022-04-06 22:32:21,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:21,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:21,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:21,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:21,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 22:32:21,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:21,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:21,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 22:32:21,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 22:32:21,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 22:32:21,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:21,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111298735] [2022-04-06 22:32:21,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:21,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606096876] [2022-04-06 22:32:21,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606096876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:21,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:21,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-06 22:32:21,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:21,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2126195695] [2022-04-06 22:32:21,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2126195695] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:21,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:21,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:32:21,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080806063] [2022-04-06 22:32:21,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:21,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:32:21,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:21,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:32:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 22:32:21,614 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 22:32:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:21,803 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-04-06 22:32:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:32:21,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-04-06 22:32:21,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:21,804 INFO L225 Difference]: With dead ends: 124 [2022-04-06 22:32:21,804 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 22:32:21,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:32:21,805 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:21,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 244 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 22:32:21,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-04-06 22:32:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 22:32:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-04-06 22:32:21,818 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-04-06 22:32:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:21,818 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-04-06 22:32:21,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 22:32:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-04-06 22:32:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 22:32:21,819 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:21,819 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:21,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:22,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 22:32:22,035 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-04-06 22:32:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:22,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730622805] [2022-04-06 22:32:22,036 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-04-06 22:32:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:22,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244796183] [2022-04-06 22:32:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:22,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:22,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:22,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614620367] [2022-04-06 22:32:22,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:22,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:22,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:22,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:22,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 22:32:22,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:22,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:22,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 22:32:22,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 34 proven. 32 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 22:32:22,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 22:32:23,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:23,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244796183] [2022-04-06 22:32:23,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:23,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614620367] [2022-04-06 22:32:23,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614620367] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:23,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:23,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2022-04-06 22:32:23,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:23,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730622805] [2022-04-06 22:32:23,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730622805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:23,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:23,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:32:23,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804643879] [2022-04-06 22:32:23,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:23,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:32:23,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:23,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:32:23,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:32:23,118 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-04-06 22:32:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:23,699 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-04-06 22:32:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:32:23,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 80 [2022-04-06 22:32:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:23,700 INFO L225 Difference]: With dead ends: 134 [2022-04-06 22:32:23,700 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 22:32:23,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-04-06 22:32:23,701 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:23,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 199 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:32:23,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 22:32:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-04-06 22:32:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 22:32:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-04-06 22:32:23,715 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 80 [2022-04-06 22:32:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:23,715 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-04-06 22:32:23,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-04-06 22:32:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-04-06 22:32:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 22:32:23,716 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:23,716 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:23,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:23,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 22:32:23,923 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-04-06 22:32:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:23,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1999546502] [2022-04-06 22:32:23,924 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-04-06 22:32:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:23,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798336185] [2022-04-06 22:32:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:23,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:23,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:23,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585577232] [2022-04-06 22:32:23,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:32:23,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:23,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:23,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:23,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 22:32:23,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:32:23,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:23,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 22:32:23,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-06 22:32:24,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:24,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:24,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798336185] [2022-04-06 22:32:24,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:24,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585577232] [2022-04-06 22:32:24,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585577232] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:24,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:24,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 22:32:24,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:24,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1999546502] [2022-04-06 22:32:24,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1999546502] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:24,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:24,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:32:24,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69724088] [2022-04-06 22:32:24,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:24,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:32:24,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:24,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:32:24,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 22:32:24,546 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 22:32:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:24,887 INFO L93 Difference]: Finished difference Result 138 states and 182 transitions. [2022-04-06 22:32:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:32:24,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2022-04-06 22:32:24,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:24,889 INFO L225 Difference]: With dead ends: 138 [2022-04-06 22:32:24,889 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 22:32:24,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:32:24,889 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 26 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:24,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 182 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:32:24,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 22:32:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2022-04-06 22:32:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 76 states have internal predecessors, (87), 47 states have call successors, (47), 13 states have call predecessors, (47), 12 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 22:32:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 178 transitions. [2022-04-06 22:32:24,915 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 178 transitions. Word has length 85 [2022-04-06 22:32:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:24,915 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 178 transitions. [2022-04-06 22:32:24,915 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 22:32:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 178 transitions. [2022-04-06 22:32:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 22:32:24,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:24,917 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:24,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:25,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 22:32:25,127 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:25,128 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-04-06 22:32:25,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:25,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1559996272] [2022-04-06 22:32:25,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:25,128 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-04-06 22:32:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:25,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488664396] [2022-04-06 22:32:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:25,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:25,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145433150] [2022-04-06 22:32:25,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:25,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:25,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:25,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:25,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 22:32:25,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:25,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:25,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 22:32:25,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 22:32:25,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 22:32:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488664396] [2022-04-06 22:32:25,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145433150] [2022-04-06 22:32:25,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145433150] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:25,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:25,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 22:32:25,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:25,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1559996272] [2022-04-06 22:32:25,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1559996272] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:25,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:25,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:32:25,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35094628] [2022-04-06 22:32:25,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:25,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:32:25,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:25,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:32:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:25,879 INFO L87 Difference]: Start difference. First operand 134 states and 178 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 22:32:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:26,145 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2022-04-06 22:32:26,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:32:26,151 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-04-06 22:32:26,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:26,153 INFO L225 Difference]: With dead ends: 161 [2022-04-06 22:32:26,153 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 22:32:26,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:32:26,154 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:26,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 275 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:32:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 22:32:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-04-06 22:32:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 89 states have internal predecessors, (102), 55 states have call successors, (55), 15 states have call predecessors, (55), 14 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 22:32:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-04-06 22:32:26,175 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 91 [2022-04-06 22:32:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:26,175 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-04-06 22:32:26,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 22:32:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-04-06 22:32:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 22:32:26,176 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:26,176 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:26,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:26,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 22:32:26,393 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:26,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:26,393 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-04-06 22:32:26,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:26,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [174524734] [2022-04-06 22:32:26,394 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-04-06 22:32:26,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:26,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833369269] [2022-04-06 22:32:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:26,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:26,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:26,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706219215] [2022-04-06 22:32:26,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:26,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:26,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:26,405 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:26,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 22:32:26,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:26,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 22:32:26,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-04-06 22:32:26,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:32:26,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833369269] [2022-04-06 22:32:26,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706219215] [2022-04-06 22:32:26,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706219215] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:26,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:26,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:26,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [174524734] [2022-04-06 22:32:26,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [174524734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:26,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:26,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:26,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892197741] [2022-04-06 22:32:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:26,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:26,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:26,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:26,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:32:26,570 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-04-06 22:32:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:26,646 INFO L93 Difference]: Finished difference Result 205 states and 283 transitions. [2022-04-06 22:32:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:32:26,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2022-04-06 22:32:26,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:26,648 INFO L225 Difference]: With dead ends: 205 [2022-04-06 22:32:26,648 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 22:32:26,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:32:26,649 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:26,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 163 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:26,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 22:32:26,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 151. [2022-04-06 22:32:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 81 states have (on average 1.123456790123457) internal successors, (91), 83 states have internal predecessors, (91), 55 states have call successors, (55), 15 states have call predecessors, (55), 14 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 22:32:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-04-06 22:32:26,665 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 100 [2022-04-06 22:32:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:26,665 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-04-06 22:32:26,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-04-06 22:32:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-04-06 22:32:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 22:32:26,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:26,666 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:26,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:26,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 22:32:26,884 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:26,885 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-04-06 22:32:26,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:26,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963118931] [2022-04-06 22:32:26,885 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:26,885 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-04-06 22:32:26,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:26,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871772006] [2022-04-06 22:32:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:26,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:26,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:26,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258129248] [2022-04-06 22:32:26,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:26,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:26,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:26,895 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:26,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 22:32:26,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:26,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:26,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 22:32:26,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 87 proven. 52 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 22:32:27,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 22:32:47,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871772006] [2022-04-06 22:32:47,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258129248] [2022-04-06 22:32:47,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258129248] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:47,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:47,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-04-06 22:32:47,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963118931] [2022-04-06 22:32:47,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963118931] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:47,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:47,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 22:32:47,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801542584] [2022-04-06 22:32:47,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:47,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 22:32:47,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:47,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 22:32:47,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-04-06 22:32:47,755 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 22:32:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:48,844 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2022-04-06 22:32:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:32:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2022-04-06 22:32:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:48,845 INFO L225 Difference]: With dead ends: 158 [2022-04-06 22:32:48,845 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 22:32:48,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-04-06 22:32:48,846 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:48,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 195 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 22:32:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 22:32:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-04-06 22:32:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 84 states have (on average 1.119047619047619) internal successors, (94), 86 states have internal predecessors, (94), 55 states have call successors, (55), 16 states have call predecessors, (55), 15 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 22:32:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 201 transitions. [2022-04-06 22:32:48,862 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 201 transitions. Word has length 107 [2022-04-06 22:32:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:48,863 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 201 transitions. [2022-04-06 22:32:48,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 22:32:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 201 transitions. [2022-04-06 22:32:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 22:32:48,864 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:48,864 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:48,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:49,077 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 22:32:49,078 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-04-06 22:32:49,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:49,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2096886467] [2022-04-06 22:32:49,079 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-04-06 22:32:49,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:49,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812940034] [2022-04-06 22:32:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:49,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:49,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:49,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501258162] [2022-04-06 22:32:49,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:49,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:49,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:49,091 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:49,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 22:32:49,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:49,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:49,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 22:32:49,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:49,613 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:32:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 58 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-04-06 22:32:50,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:51,465 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:32:56,703 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 55 proven. 45 refuted. 4 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 22:33:04,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:04,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812940034] [2022-04-06 22:33:04,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:04,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501258162] [2022-04-06 22:33:04,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501258162] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:04,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:04,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-04-06 22:33:04,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:04,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2096886467] [2022-04-06 22:33:04,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2096886467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:04,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:04,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 22:33:04,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083020773] [2022-04-06 22:33:04,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:04,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 22:33:04,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:04,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 22:33:04,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=627, Unknown=4, NotChecked=0, Total=756 [2022-04-06 22:33:04,064 INFO L87 Difference]: Start difference. First operand 155 states and 201 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 22:33:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:05,493 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2022-04-06 22:33:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:33:05,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2022-04-06 22:33:05,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:05,495 INFO L225 Difference]: With dead ends: 188 [2022-04-06 22:33:05,495 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 22:33:05,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=185, Invalid=933, Unknown=4, NotChecked=0, Total=1122 [2022-04-06 22:33:05,496 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 42 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:05,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 267 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 22:33:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 22:33:05,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-04-06 22:33:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 99 states have (on average 1.121212121212121) internal successors, (111), 101 states have internal predecessors, (111), 67 states have call successors, (67), 18 states have call predecessors, (67), 17 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 22:33:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 242 transitions. [2022-04-06 22:33:05,520 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 242 transitions. Word has length 113 [2022-04-06 22:33:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:05,520 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 242 transitions. [2022-04-06 22:33:05,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 22:33:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 242 transitions. [2022-04-06 22:33:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 22:33:05,522 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:05,522 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:05,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:05,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:05,735 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:05,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:05,736 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-04-06 22:33:05,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:05,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [664687674] [2022-04-06 22:33:05,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:05,736 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-04-06 22:33:05,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:05,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167835807] [2022-04-06 22:33:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:05,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:05,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:05,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886737710] [2022-04-06 22:33:05,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:33:05,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:05,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:05,744 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:33:05,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 22:33:05,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:33:05,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:05,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:33:05,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 22:33:05,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 22:33:06,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:06,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167835807] [2022-04-06 22:33:06,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:06,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886737710] [2022-04-06 22:33:06,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886737710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:06,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:06,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-04-06 22:33:06,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:06,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [664687674] [2022-04-06 22:33:06,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [664687674] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:06,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:06,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:33:06,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366990811] [2022-04-06 22:33:06,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:06,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:33:06,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:06,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:33:06,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:33:06,114 INFO L87 Difference]: Start difference. First operand 184 states and 242 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-04-06 22:33:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:06,350 INFO L93 Difference]: Finished difference Result 244 states and 342 transitions. [2022-04-06 22:33:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:33:06,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2022-04-06 22:33:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:06,352 INFO L225 Difference]: With dead ends: 244 [2022-04-06 22:33:06,352 INFO L226 Difference]: Without dead ends: 236 [2022-04-06 22:33:06,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:33:06,353 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 14 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:06,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 280 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:33:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-04-06 22:33:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 217. [2022-04-06 22:33:06,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 87 states have call successors, (87), 18 states have call predecessors, (87), 17 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-04-06 22:33:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 300 transitions. [2022-04-06 22:33:06,379 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 300 transitions. Word has length 116 [2022-04-06 22:33:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:06,379 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 300 transitions. [2022-04-06 22:33:06,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-04-06 22:33:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 300 transitions. [2022-04-06 22:33:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 22:33:06,380 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:06,380 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:06,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:06,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 22:33:06,595 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-04-06 22:33:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:06,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452939062] [2022-04-06 22:33:06,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-04-06 22:33:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:06,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202170898] [2022-04-06 22:33:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:06,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:06,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:06,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286797215] [2022-04-06 22:33:06,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:33:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:06,607 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:33:06,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 22:33:06,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:33:06,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:06,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 22:33:06,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-04-06 22:33:06,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-04-06 22:33:07,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:07,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202170898] [2022-04-06 22:33:07,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:07,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286797215] [2022-04-06 22:33:07,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286797215] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:07,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:07,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 22:33:07,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:07,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452939062] [2022-04-06 22:33:07,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452939062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:07,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:07,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:33:07,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818007380] [2022-04-06 22:33:07,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:07,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:33:07,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:07,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:33:07,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:33:07,028 INFO L87 Difference]: Start difference. First operand 217 states and 300 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 22:33:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:07,273 INFO L93 Difference]: Finished difference Result 235 states and 314 transitions. [2022-04-06 22:33:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:33:07,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 122 [2022-04-06 22:33:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:07,279 INFO L225 Difference]: With dead ends: 235 [2022-04-06 22:33:07,279 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 22:33:07,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:33:07,280 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:07,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 183 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:33:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 22:33:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-04-06 22:33:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 125 states have internal predecessors, (141), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 22:33:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 309 transitions. [2022-04-06 22:33:07,314 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 309 transitions. Word has length 122 [2022-04-06 22:33:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:07,314 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 309 transitions. [2022-04-06 22:33:07,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 22:33:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 309 transitions. [2022-04-06 22:33:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 22:33:07,315 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:07,315 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:07,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:07,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 22:33:07,532 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:07,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-04-06 22:33:07,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:07,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2137548951] [2022-04-06 22:33:07,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-04-06 22:33:07,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:07,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733142732] [2022-04-06 22:33:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:07,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:07,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221050252] [2022-04-06 22:33:07,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:33:07,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:07,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:07,541 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:33:07,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 22:33:07,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:33:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 22:33:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 22:33:08,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 22:33:09,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:09,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733142732] [2022-04-06 22:33:09,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:09,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221050252] [2022-04-06 22:33:09,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221050252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:09,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:09,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-04-06 22:33:09,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:09,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2137548951] [2022-04-06 22:33:09,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2137548951] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:09,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:09,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:33:09,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653628149] [2022-04-06 22:33:09,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:09,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:33:09,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:09,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:33:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:33:09,072 INFO L87 Difference]: Start difference. First operand 231 states and 309 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 22:33:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:09,603 INFO L93 Difference]: Finished difference Result 269 states and 358 transitions. [2022-04-06 22:33:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:33:09,603 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2022-04-06 22:33:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:09,604 INFO L225 Difference]: With dead ends: 269 [2022-04-06 22:33:09,604 INFO L226 Difference]: Without dead ends: 267 [2022-04-06 22:33:09,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-04-06 22:33:09,605 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:09,605 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 378 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:33:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-04-06 22:33:09,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2022-04-06 22:33:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-06 22:33:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-04-06 22:33:09,641 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 127 [2022-04-06 22:33:09,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:09,642 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-04-06 22:33:09,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 22:33:09,642 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-04-06 22:33:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 22:33:09,643 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:09,643 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:09,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:09,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 22:33:09,860 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-04-06 22:33:09,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:09,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [635050029] [2022-04-06 22:33:09,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-04-06 22:33:09,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:09,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287955080] [2022-04-06 22:33:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:09,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:09,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:09,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987274727] [2022-04-06 22:33:09,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:33:09,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:09,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:09,874 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:33:09,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 22:33:09,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:33:09,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:09,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 22:33:09,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-04-06 22:33:10,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:12,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:12,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287955080] [2022-04-06 22:33:12,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:12,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987274727] [2022-04-06 22:33:12,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987274727] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:33:12,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:33:12,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 22:33:12,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:12,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [635050029] [2022-04-06 22:33:12,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [635050029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:12,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:12,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:33:12,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529169069] [2022-04-06 22:33:12,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:12,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:33:12,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:12,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:33:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=139, Unknown=1, NotChecked=0, Total=182 [2022-04-06 22:33:12,934 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-04-06 22:33:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:13,264 INFO L93 Difference]: Finished difference Result 281 states and 367 transitions. [2022-04-06 22:33:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:33:13,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 129 [2022-04-06 22:33:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:13,267 INFO L225 Difference]: With dead ends: 281 [2022-04-06 22:33:13,267 INFO L226 Difference]: Without dead ends: 279 [2022-04-06 22:33:13,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2022-04-06 22:33:13,268 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:13,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 199 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:33:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-06 22:33:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 258. [2022-04-06 22:33:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 143 states have (on average 1.118881118881119) internal successors, (160), 145 states have internal predecessors, (160), 88 states have call successors, (88), 27 states have call predecessors, (88), 26 states have return successors, (86), 85 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-06 22:33:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 334 transitions. [2022-04-06 22:33:13,298 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 334 transitions. Word has length 129 [2022-04-06 22:33:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:13,299 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 334 transitions. [2022-04-06 22:33:13,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-04-06 22:33:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 334 transitions. [2022-04-06 22:33:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 22:33:13,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:13,300 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:13,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-04-06 22:33:13,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:13,515 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-04-06 22:33:13,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:13,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [805559721] [2022-04-06 22:33:13,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-04-06 22:33:13,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:13,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561025488] [2022-04-06 22:33:13,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:13,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:13,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:13,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951288182] [2022-04-06 22:33:13,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:33:13,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:13,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:13,530 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) [2022-04-06 22:33:13,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 22:33:13,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:33:13,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 22:33:13,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:24,588 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:33:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 133 proven. 85 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-04-06 22:33:24,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:24,725 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:24,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:24,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561025488] [2022-04-06 22:33:24,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:24,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951288182] [2022-04-06 22:33:24,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951288182] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:33:24,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:33:24,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 22:33:24,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:24,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [805559721] [2022-04-06 22:33:24,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [805559721] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:24,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:24,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:33:24,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070716015] [2022-04-06 22:33:24,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:24,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:33:24,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:33:24,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:33:24,850 INFO L87 Difference]: Start difference. First operand 258 states and 334 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 22:33:27,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:33:41,304 WARN L232 SmtUtils]: Spent 14.05s on a formula simplification. DAG size of input: 36 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:33:41,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:41,465 INFO L93 Difference]: Finished difference Result 296 states and 384 transitions. [2022-04-06 22:33:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:33:41,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 132 [2022-04-06 22:33:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:41,469 INFO L225 Difference]: With dead ends: 296 [2022-04-06 22:33:41,469 INFO L226 Difference]: Without dead ends: 294 [2022-04-06 22:33:41,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:33:41,470 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 42 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:41,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 173 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 329 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 22:33:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-04-06 22:33:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2022-04-06 22:33:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 161 states have (on average 1.124223602484472) internal successors, (181), 163 states have internal predecessors, (181), 100 states have call successors, (100), 30 states have call predecessors, (100), 29 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2022-04-06 22:33:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 379 transitions. [2022-04-06 22:33:41,530 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 379 transitions. Word has length 132 [2022-04-06 22:33:41,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:41,530 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 379 transitions. [2022-04-06 22:33:41,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 22:33:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 379 transitions. [2022-04-06 22:33:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 22:33:41,531 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:41,531 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:41,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:41,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:41,732 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:41,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-04-06 22:33:41,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:41,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368614177] [2022-04-06 22:33:41,733 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:41,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-04-06 22:33:41,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:41,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326065050] [2022-04-06 22:33:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:41,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:41,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:41,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755867132] [2022-04-06 22:33:41,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:33:41,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:41,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:41,740 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) [2022-04-06 22:33:41,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 22:33:41,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:33:41,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:41,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 22:33:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-04-06 22:33:43,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-04-06 22:33:45,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:45,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326065050] [2022-04-06 22:33:45,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:45,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755867132] [2022-04-06 22:33:45,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755867132] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:45,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:45,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-04-06 22:33:45,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:45,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368614177] [2022-04-06 22:33:45,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368614177] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:45,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:45,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 22:33:45,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416492876] [2022-04-06 22:33:45,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:45,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 22:33:45,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 22:33:45,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-04-06 22:33:45,166 INFO L87 Difference]: Start difference. First operand 291 states and 379 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 22:33:46,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:46,597 INFO L93 Difference]: Finished difference Result 339 states and 443 transitions. [2022-04-06 22:33:46,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:33:46,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2022-04-06 22:33:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:46,599 INFO L225 Difference]: With dead ends: 339 [2022-04-06 22:33:46,599 INFO L226 Difference]: Without dead ends: 332 [2022-04-06 22:33:46,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-04-06 22:33:46,600 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:46,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 326 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:33:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-04-06 22:33:46,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 301. [2022-04-06 22:33:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 166 states have (on average 1.1265060240963856) internal successors, (187), 168 states have internal predecessors, (187), 104 states have call successors, (104), 31 states have call predecessors, (104), 30 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2022-04-06 22:33:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 393 transitions. [2022-04-06 22:33:46,654 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 393 transitions. Word has length 135 [2022-04-06 22:33:46,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:46,654 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 393 transitions. [2022-04-06 22:33:46,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 22:33:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 393 transitions. [2022-04-06 22:33:46,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 22:33:46,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:46,656 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:46,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:46,870 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 22:33:46,871 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:46,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-04-06 22:33:46,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:46,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1209109691] [2022-04-06 22:33:46,871 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:46,872 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-04-06 22:33:46,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:46,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259417107] [2022-04-06 22:33:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:46,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:46,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:46,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366431490] [2022-04-06 22:33:46,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:33:46,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:46,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:46,895 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) [2022-04-06 22:33:46,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 22:33:46,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:33:46,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:46,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 22:33:46,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:48,606 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:48,608 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:48,609 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 149 proven. 58 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-04-06 22:33:49,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-04-06 22:33:52,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:52,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259417107] [2022-04-06 22:33:52,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:52,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366431490] [2022-04-06 22:33:52,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366431490] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:52,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:52,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 32 [2022-04-06 22:33:52,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:52,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1209109691] [2022-04-06 22:33:52,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1209109691] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:52,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:52,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 22:33:52,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400411465] [2022-04-06 22:33:52,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:52,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 22:33:52,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:52,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 22:33:52,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-04-06 22:33:52,204 INFO L87 Difference]: Start difference. First operand 301 states and 393 transitions. Second operand has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 22:33:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:55,910 INFO L93 Difference]: Finished difference Result 351 states and 459 transitions. [2022-04-06 22:33:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 22:33:55,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-04-06 22:33:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:55,913 INFO L225 Difference]: With dead ends: 351 [2022-04-06 22:33:55,913 INFO L226 Difference]: Without dead ends: 348 [2022-04-06 22:33:55,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 22:33:55,914 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 57 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:55,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 278 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 22:33:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-04-06 22:33:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 315. [2022-04-06 22:33:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 174 states have (on average 1.1264367816091954) internal successors, (196), 176 states have internal predecessors, (196), 108 states have call successors, (108), 33 states have call predecessors, (108), 32 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2022-04-06 22:33:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 410 transitions. [2022-04-06 22:33:55,974 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 410 transitions. Word has length 138 [2022-04-06 22:33:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:55,975 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 410 transitions. [2022-04-06 22:33:55,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 22:33:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 410 transitions. [2022-04-06 22:33:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 22:33:55,976 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:55,976 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:55,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:56,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 22:33:56,182 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:56,182 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 11 times [2022-04-06 22:33:56,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:56,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [221405185] [2022-04-06 22:33:56,183 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 12 times [2022-04-06 22:33:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:56,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4039304] [2022-04-06 22:33:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:56,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:56,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:56,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031596894] [2022-04-06 22:33:56,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:33:56,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:56,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:56,189 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) [2022-04-06 22:33:56,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 22:33:56,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:33:56,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 22:33:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 76 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-04-06 22:33:56,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 149 proven. 31 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-04-06 22:33:57,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:57,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4039304] [2022-04-06 22:33:57,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:57,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031596894] [2022-04-06 22:33:57,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031596894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:57,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:57,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2022-04-06 22:33:57,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [221405185] [2022-04-06 22:33:57,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [221405185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:57,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:57,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:33:57,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154024566] [2022-04-06 22:33:57,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:57,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:33:57,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:57,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:33:57,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:33:57,129 INFO L87 Difference]: Start difference. First operand 315 states and 410 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 22:33:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:57,775 INFO L93 Difference]: Finished difference Result 383 states and 501 transitions. [2022-04-06 22:33:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:33:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 149 [2022-04-06 22:33:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:57,777 INFO L225 Difference]: With dead ends: 383 [2022-04-06 22:33:57,777 INFO L226 Difference]: Without dead ends: 381 [2022-04-06 22:33:57,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:33:57,778 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 38 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:57,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 315 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:33:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-04-06 22:33:57,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-04-06 22:33:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 207 states have (on average 1.1256038647342994) internal successors, (233), 209 states have internal predecessors, (233), 132 states have call successors, (132), 38 states have call predecessors, (132), 37 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2022-04-06 22:33:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 495 transitions. [2022-04-06 22:33:57,849 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 495 transitions. Word has length 149 [2022-04-06 22:33:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:57,849 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 495 transitions. [2022-04-06 22:33:57,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 22:33:57,849 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 495 transitions. [2022-04-06 22:33:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-04-06 22:33:57,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:57,850 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:57,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:58,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:58,060 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 13 times [2022-04-06 22:33:58,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1365157225] [2022-04-06 22:33:58,061 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:58,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 14 times [2022-04-06 22:33:58,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:58,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810214421] [2022-04-06 22:33:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:58,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:58,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:58,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243751373] [2022-04-06 22:33:58,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:33:58,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:58,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:58,067 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) [2022-04-06 22:33:58,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 22:33:58,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:33:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:58,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 22:33:58,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:58,722 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:58,726 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:59,886 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:59,887 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:34:00,660 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:34:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 192 proven. 173 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 22:34:08,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:18,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:18,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810214421] [2022-04-06 22:34:18,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:18,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243751373] [2022-04-06 22:34:18,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243751373] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:34:18,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:34:18,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 22:34:18,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:18,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1365157225] [2022-04-06 22:34:18,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1365157225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:18,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:18,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 22:34:18,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225961230] [2022-04-06 22:34:18,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:18,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 22:34:18,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 22:34:18,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=395, Unknown=4, NotChecked=0, Total=506 [2022-04-06 22:34:18,768 INFO L87 Difference]: Start difference. First operand 377 states and 495 transitions. Second operand has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-04-06 22:35:05,013 WARN L232 SmtUtils]: Spent 44.25s on a formula simplification. DAG size of input: 72 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:35:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:35:05,241 INFO L93 Difference]: Finished difference Result 400 states and 519 transitions. [2022-04-06 22:35:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:35:05,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 154 [2022-04-06 22:35:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:35:05,244 INFO L225 Difference]: With dead ends: 400 [2022-04-06 22:35:05,244 INFO L226 Difference]: Without dead ends: 398 [2022-04-06 22:35:05,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=146, Invalid=606, Unknown=4, NotChecked=0, Total=756 [2022-04-06 22:35:05,245 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 26 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:35:05,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 411 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 915 Invalid, 0 Unknown, 112 Unchecked, 1.5s Time] [2022-04-06 22:35:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-04-06 22:35:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 397. [2022-04-06 22:35:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 220 states have (on average 1.1181818181818182) internal successors, (246), 223 states have internal predecessors, (246), 136 states have call successors, (136), 41 states have call predecessors, (136), 40 states have return successors, (134), 132 states have call predecessors, (134), 134 states have call successors, (134) [2022-04-06 22:35:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 516 transitions. [2022-04-06 22:35:05,320 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 516 transitions. Word has length 154 [2022-04-06 22:35:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:35:05,320 INFO L478 AbstractCegarLoop]: Abstraction has 397 states and 516 transitions. [2022-04-06 22:35:05,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-04-06 22:35:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 516 transitions. [2022-04-06 22:35:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 22:35:05,321 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:35:05,321 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:35:05,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 22:35:05,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:35:05,522 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:35:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:35:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 11 times [2022-04-06 22:35:05,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:35:05,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1978690055] [2022-04-06 22:35:05,523 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:35:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 12 times [2022-04-06 22:35:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:35:05,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450314824] [2022-04-06 22:35:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:35:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:35:05,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:35:05,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744214353] [2022-04-06 22:35:05,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:35:05,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:35:05,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:35:05,530 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) [2022-04-06 22:35:05,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 22:35:05,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 22:35:05,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:35:05,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 22:35:05,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:35:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 89 proven. 97 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-04-06 22:35:06,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:35:07,649 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:35:41,870 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:37:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 107 proven. 85 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-04-06 22:37:29,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:37:29,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450314824] [2022-04-06 22:37:29,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:37:29,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744214353] [2022-04-06 22:37:29,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744214353] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:37:29,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:37:29,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2022-04-06 22:37:29,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:37:29,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1978690055] [2022-04-06 22:37:29,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1978690055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:37:29,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:37:29,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:37:29,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281992613] [2022-04-06 22:37:29,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:37:29,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:37:29,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:37:29,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:37:29,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:37:29,603 INFO L87 Difference]: Start difference. First operand 397 states and 516 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 22:37:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:37:30,653 INFO L93 Difference]: Finished difference Result 409 states and 526 transitions. [2022-04-06 22:37:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:37:30,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 157 [2022-04-06 22:37:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:37:30,655 INFO L225 Difference]: With dead ends: 409 [2022-04-06 22:37:30,655 INFO L226 Difference]: Without dead ends: 402 [2022-04-06 22:37:30,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-04-06 22:37:30,656 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 22 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:37:30,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 282 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:37:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-04-06 22:37:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 370. [2022-04-06 22:37:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 206 states have (on average 1.1116504854368932) internal successors, (229), 208 states have internal predecessors, (229), 125 states have call successors, (125), 39 states have call predecessors, (125), 38 states have return successors, (123), 122 states have call predecessors, (123), 123 states have call successors, (123) [2022-04-06 22:37:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 477 transitions. [2022-04-06 22:37:30,724 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 477 transitions. Word has length 157 [2022-04-06 22:37:30,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:37:30,724 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 477 transitions. [2022-04-06 22:37:30,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 22:37:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 477 transitions. [2022-04-06 22:37:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-06 22:37:30,725 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:37:30,725 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:37:30,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 22:37:30,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 22:37:30,939 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:37:30,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:37:30,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 13 times [2022-04-06 22:37:30,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:37:30,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [279651375] [2022-04-06 22:37:30,940 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:37:30,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 14 times [2022-04-06 22:37:30,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:37:30,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545966066] [2022-04-06 22:37:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:37:30,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:37:30,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:37:30,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530590857] [2022-04-06 22:37:30,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:37:30,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:37:30,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:37:30,948 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) [2022-04-06 22:37:30,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 22:37:31,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:37:31,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:37:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 22:37:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:37:32,069 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:37:32,070 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:37:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 142 proven. 118 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2022-04-06 22:37:32,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:37:35,260 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:37:35,263 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:37:39,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:37:39,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545966066] [2022-04-06 22:37:39,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:37:39,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530590857] [2022-04-06 22:37:39,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530590857] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:37:39,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:37:39,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 22:37:39,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:37:39,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [279651375] [2022-04-06 22:37:39,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [279651375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:37:39,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:37:39,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 22:37:39,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786198909] [2022-04-06 22:37:39,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:37:39,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 22:37:39,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:37:39,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 22:37:39,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-04-06 22:37:39,464 INFO L87 Difference]: Start difference. First operand 370 states and 477 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-04-06 22:37:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:37:42,920 INFO L93 Difference]: Finished difference Result 414 states and 538 transitions. [2022-04-06 22:37:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:37:42,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) Word has length 160 [2022-04-06 22:37:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:37:42,923 INFO L225 Difference]: With dead ends: 414 [2022-04-06 22:37:42,923 INFO L226 Difference]: Without dead ends: 411 [2022-04-06 22:37:42,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 22:37:42,924 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 39 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:37:42,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 377 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 22:37:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-04-06 22:37:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2022-04-06 22:37:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 226 states have (on average 1.1150442477876106) internal successors, (252), 228 states have internal predecessors, (252), 141 states have call successors, (141), 42 states have call predecessors, (141), 41 states have return successors, (139), 138 states have call predecessors, (139), 139 states have call successors, (139) [2022-04-06 22:37:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 532 transitions. [2022-04-06 22:37:43,004 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 532 transitions. Word has length 160 [2022-04-06 22:37:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:37:43,005 INFO L478 AbstractCegarLoop]: Abstraction has 409 states and 532 transitions. [2022-04-06 22:37:43,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-04-06 22:37:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 532 transitions. [2022-04-06 22:37:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-06 22:37:43,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:37:43,006 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:37:43,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 22:37:43,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 22:37:43,223 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:37:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:37:43,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 15 times [2022-04-06 22:37:43,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:37:43,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [237003024] [2022-04-06 22:37:43,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:37:43,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 16 times [2022-04-06 22:37:43,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:37:43,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066698614] [2022-04-06 22:37:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:37:43,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:37:43,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:37:43,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461607512] [2022-04-06 22:37:43,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:37:43,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:37:43,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:37:43,230 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) [2022-04-06 22:37:43,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 22:37:43,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:37:43,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:37:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 22:37:43,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:37:44,473 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:37:44,474 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:37:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 177 proven. 122 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-04-06 22:37:44,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:37:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 202 proven. 12 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2022-04-06 22:37:46,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:37:46,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066698614] [2022-04-06 22:37:46,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:37:46,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461607512] [2022-04-06 22:37:46,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461607512] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:37:46,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:37:46,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 23 [2022-04-06 22:37:46,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:37:46,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [237003024] [2022-04-06 22:37:46,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [237003024] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:37:46,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:37:46,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 22:37:46,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151968707] [2022-04-06 22:37:46,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:37:46,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 22:37:46,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:37:46,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 22:37:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:37:46,675 INFO L87 Difference]: Start difference. First operand 409 states and 532 transitions. Second operand has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-04-06 22:37:50,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:37:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:37:52,039 INFO L93 Difference]: Finished difference Result 458 states and 597 transitions. [2022-04-06 22:37:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:37:52,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 160 [2022-04-06 22:37:52,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:37:52,043 INFO L225 Difference]: With dead ends: 458 [2022-04-06 22:37:52,043 INFO L226 Difference]: Without dead ends: 455 [2022-04-06 22:37:52,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-04-06 22:37:52,043 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 37 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:37:52,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 431 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1227 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 22:37:52,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-04-06 22:37:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 452. [2022-04-06 22:37:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 249 states have (on average 1.1164658634538152) internal successors, (278), 251 states have internal predecessors, (278), 157 states have call successors, (157), 46 states have call predecessors, (157), 45 states have return successors, (155), 154 states have call predecessors, (155), 155 states have call successors, (155) [2022-04-06 22:37:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 590 transitions. [2022-04-06 22:37:52,143 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 590 transitions. Word has length 160 [2022-04-06 22:37:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:37:52,143 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 590 transitions. [2022-04-06 22:37:52,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-04-06 22:37:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 590 transitions. [2022-04-06 22:37:52,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-04-06 22:37:52,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:37:52,145 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:37:52,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 22:37:52,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 22:37:52,363 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:37:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:37:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 15 times [2022-04-06 22:37:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:37:52,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1829121458] [2022-04-06 22:37:52,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:37:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 16 times [2022-04-06 22:37:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:37:52,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740765887] [2022-04-06 22:37:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:37:52,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:37:52,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:37:52,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978966818] [2022-04-06 22:37:52,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:37:52,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:37:52,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:37:52,371 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:37:52,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 22:37:52,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:37:52,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:37:52,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 22:37:52,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:37:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 162 proven. 112 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2022-04-06 22:37:54,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:37:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 108 proven. 94 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2022-04-06 22:37:57,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:37:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740765887] [2022-04-06 22:37:57,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:37:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978966818] [2022-04-06 22:37:57,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978966818] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:37:57,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:37:57,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-04-06 22:37:57,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:37:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1829121458] [2022-04-06 22:37:57,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1829121458] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:37:57,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:37:57,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 22:37:57,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49544529] [2022-04-06 22:37:57,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:37:57,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 22:37:57,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:37:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 22:37:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 22:37:57,205 INFO L87 Difference]: Start difference. First operand 452 states and 590 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2022-04-06 22:37:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:37:59,847 INFO L93 Difference]: Finished difference Result 498 states and 645 transitions. [2022-04-06 22:37:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 22:37:59,848 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) Word has length 174 [2022-04-06 22:37:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:37:59,850 INFO L225 Difference]: With dead ends: 498 [2022-04-06 22:37:59,850 INFO L226 Difference]: Without dead ends: 496 [2022-04-06 22:37:59,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 22:37:59,851 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 64 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:37:59,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 296 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 22:37:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-04-06 22:37:59,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 475. [2022-04-06 22:37:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 265 states have (on average 1.109433962264151) internal successors, (294), 268 states have internal predecessors, (294), 160 states have call successors, (160), 50 states have call predecessors, (160), 49 states have return successors, (158), 156 states have call predecessors, (158), 158 states have call successors, (158) [2022-04-06 22:37:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 612 transitions. [2022-04-06 22:37:59,942 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 612 transitions. Word has length 174 [2022-04-06 22:37:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:37:59,942 INFO L478 AbstractCegarLoop]: Abstraction has 475 states and 612 transitions. [2022-04-06 22:37:59,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2022-04-06 22:37:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 612 transitions. [2022-04-06 22:37:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 22:37:59,944 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:37:59,944 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:37:59,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 22:38:00,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 22:38:00,159 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:38:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:38:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1112136673, now seen corresponding path program 17 times [2022-04-06 22:38:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:38:00,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1505633544] [2022-04-06 22:38:00,160 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:38:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1112136673, now seen corresponding path program 18 times [2022-04-06 22:38:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:38:00,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515957525] [2022-04-06 22:38:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:38:00,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:38:00,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:38:00,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064259409] [2022-04-06 22:38:00,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:38:00,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:38:00,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:38:00,171 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:38:00,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 22:38:00,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:38:00,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:38:00,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:38:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:38:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 131 proven. 10 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2022-04-06 22:38:00,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:38:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 131 proven. 10 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2022-04-06 22:38:00,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:38:00,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515957525] [2022-04-06 22:38:00,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:38:00,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064259409] [2022-04-06 22:38:00,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064259409] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:38:00,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:38:00,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 22:38:00,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:38:00,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1505633544] [2022-04-06 22:38:00,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1505633544] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:38:00,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:38:00,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:38:00,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992670524] [2022-04-06 22:38:00,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:38:00,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:38:00,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:38:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:38:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:38:00,767 INFO L87 Difference]: Start difference. First operand 475 states and 612 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-06 22:38:01,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:38:01,205 INFO L93 Difference]: Finished difference Result 497 states and 629 transitions. [2022-04-06 22:38:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:38:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 176 [2022-04-06 22:38:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:38:01,207 INFO L225 Difference]: With dead ends: 497 [2022-04-06 22:38:01,207 INFO L226 Difference]: Without dead ends: 495 [2022-04-06 22:38:01,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:38:01,208 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:38:01,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 155 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:38:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-04-06 22:38:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2022-04-06 22:38:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 280 states have (on average 1.1035714285714286) internal successors, (309), 283 states have internal predecessors, (309), 160 states have call successors, (160), 55 states have call predecessors, (160), 54 states have return successors, (158), 156 states have call predecessors, (158), 158 states have call successors, (158) [2022-04-06 22:38:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 627 transitions. [2022-04-06 22:38:01,304 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 627 transitions. Word has length 176 [2022-04-06 22:38:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:38:01,304 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 627 transitions. [2022-04-06 22:38:01,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-06 22:38:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 627 transitions. [2022-04-06 22:38:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 22:38:01,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:38:01,305 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:38:01,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 22:38:01,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 22:38:01,519 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:38:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:38:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 19 times [2022-04-06 22:38:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:38:01,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [84031411] [2022-04-06 22:38:01,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:38:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 20 times [2022-04-06 22:38:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:38:01,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449545726] [2022-04-06 22:38:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:38:01,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:38:01,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:38:01,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061977155] [2022-04-06 22:38:01,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:38:01,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:38:01,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:38:01,529 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:38:01,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 22:38:01,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:38:01,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:38:01,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 22:38:01,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:38:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 247 proven. 212 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2022-04-06 22:38:05,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:38:30,643 WARN L232 SmtUtils]: Spent 9.47s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:38:56,427 WARN L232 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:40:12,640 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0_BEFORE_CALL_426 Int) (v_main_~xy~0_BEFORE_CALL_185 Int) (v_main_~s~0_BEFORE_CALL_523 Int) (v_main_~r~0_BEFORE_CALL_470 Int) (v_main_~x~0_BEFORE_CALL_534 Int) (v_main_~k~0_BEFORE_CALL_339 Int) (v_main_~q~0_BEFORE_CALL_488 Int) (v_main_~y~0_BEFORE_CALL_545 Int) (v_main_~yy~0_BEFORE_CALL_181 Int)) (let ((.cse16 (* v_main_~k~0_BEFORE_CALL_339 v_main_~s~0_BEFORE_CALL_523)) (.cse15 (* (- 1) v_main_~k~0_BEFORE_CALL_339 v_main_~q~0_BEFORE_CALL_488))) (let ((.cse9 (+ (* (- 2) v_main_~p~0_BEFORE_CALL_426) (* (- 2) .cse15) v_main_~q~0_BEFORE_CALL_488)) (.cse10 (+ (* (- 2) v_main_~r~0_BEFORE_CALL_470) (* 2 .cse16) v_main_~s~0_BEFORE_CALL_523))) (let ((.cse7 (* v_main_~y~0_BEFORE_CALL_545 .cse10)) (.cse8 (* .cse9 v_main_~x~0_BEFORE_CALL_534))) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_545 v_main_~r~0_BEFORE_CALL_470)) (.cse1 (* v_main_~p~0_BEFORE_CALL_426 v_main_~x~0_BEFORE_CALL_534)) (.cse4 (* v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse3 (* v_main_~k~0_BEFORE_CALL_339 v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse5 (* v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse2 (* v_main_~k~0_BEFORE_CALL_339 v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse6 (+ .cse7 .cse8))) (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (<= (+ (* .cse0 3) (* .cse1 3)) (+ (* .cse2 3) (* .cse3 3) .cse4 .cse5)) (= (+ (* .cse6 v_main_~y~0_BEFORE_CALL_545) .cse7 .cse8) (+ (* .cse9 v_main_~xy~0_BEFORE_CALL_185) .cse7 (* v_main_~yy~0_BEFORE_CALL_181 .cse10) .cse8)) (not (<= (+ (* 2 .cse0) (* .cse1 2)) (+ .cse4 (* .cse3 2) .cse5 (* .cse2 2)))) (= .cse6 0) (not (let ((.cse13 (+ v_main_~r~0_BEFORE_CALL_470 (* (- 1) .cse16))) (.cse14 (+ v_main_~p~0_BEFORE_CALL_426 .cse15))) (let ((.cse11 (* v_main_~x~0_BEFORE_CALL_534 .cse14)) (.cse12 (* v_main_~y~0_BEFORE_CALL_545 .cse13))) (= (+ (* (+ .cse11 .cse12) v_main_~y~0_BEFORE_CALL_545) .cse11 .cse12) (+ .cse11 (* v_main_~yy~0_BEFORE_CALL_181 .cse13) (* v_main_~xy~0_BEFORE_CALL_185 .cse14) .cse12))))))))))) is different from false [2022-04-06 22:40:14,644 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0_BEFORE_CALL_426 Int) (v_main_~xy~0_BEFORE_CALL_185 Int) (v_main_~s~0_BEFORE_CALL_523 Int) (v_main_~r~0_BEFORE_CALL_470 Int) (v_main_~x~0_BEFORE_CALL_534 Int) (v_main_~k~0_BEFORE_CALL_339 Int) (v_main_~q~0_BEFORE_CALL_488 Int) (v_main_~y~0_BEFORE_CALL_545 Int) (v_main_~yy~0_BEFORE_CALL_181 Int)) (let ((.cse16 (* v_main_~k~0_BEFORE_CALL_339 v_main_~s~0_BEFORE_CALL_523)) (.cse15 (* (- 1) v_main_~k~0_BEFORE_CALL_339 v_main_~q~0_BEFORE_CALL_488))) (let ((.cse9 (+ (* (- 2) v_main_~p~0_BEFORE_CALL_426) (* (- 2) .cse15) v_main_~q~0_BEFORE_CALL_488)) (.cse10 (+ (* (- 2) v_main_~r~0_BEFORE_CALL_470) (* 2 .cse16) v_main_~s~0_BEFORE_CALL_523))) (let ((.cse7 (* v_main_~y~0_BEFORE_CALL_545 .cse10)) (.cse8 (* .cse9 v_main_~x~0_BEFORE_CALL_534))) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_545 v_main_~r~0_BEFORE_CALL_470)) (.cse1 (* v_main_~p~0_BEFORE_CALL_426 v_main_~x~0_BEFORE_CALL_534)) (.cse4 (* v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse3 (* v_main_~k~0_BEFORE_CALL_339 v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse5 (* v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse2 (* v_main_~k~0_BEFORE_CALL_339 v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse6 (+ .cse7 .cse8))) (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (<= (+ (* .cse0 3) (* .cse1 3)) (+ (* .cse2 3) (* .cse3 3) .cse4 .cse5)) (= (+ (* .cse6 v_main_~y~0_BEFORE_CALL_545) .cse7 .cse8) (+ (* .cse9 v_main_~xy~0_BEFORE_CALL_185) .cse7 (* v_main_~yy~0_BEFORE_CALL_181 .cse10) .cse8)) (not (<= (+ (* 2 .cse0) (* .cse1 2)) (+ .cse4 (* .cse3 2) .cse5 (* .cse2 2)))) (= .cse6 0) (not (let ((.cse13 (+ v_main_~r~0_BEFORE_CALL_470 (* (- 1) .cse16))) (.cse14 (+ v_main_~p~0_BEFORE_CALL_426 .cse15))) (let ((.cse11 (* v_main_~x~0_BEFORE_CALL_534 .cse14)) (.cse12 (* v_main_~y~0_BEFORE_CALL_545 .cse13))) (= (+ (* (+ .cse11 .cse12) v_main_~y~0_BEFORE_CALL_545) .cse11 .cse12) (+ .cse11 (* v_main_~yy~0_BEFORE_CALL_181 .cse13) (* v_main_~xy~0_BEFORE_CALL_185 .cse14) .cse12))))))))))) is different from true [2022-04-06 22:40:38,999 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~s~0_BEFORE_CALL_523 Int) (v_main_~p~0_BEFORE_CALL_426 Int) (v_main_~xy~0_BEFORE_CALL_185 Int) (v_main_~r~0_BEFORE_CALL_470 Int) (v_main_~x~0_BEFORE_CALL_534 Int) (v_main_~k~0_BEFORE_CALL_339 Int) (v_main_~q~0_BEFORE_CALL_488 Int) (v_main_~y~0_BEFORE_CALL_545 Int) (v_main_~yy~0_BEFORE_CALL_181 Int)) (let ((.cse16 (* v_main_~k~0_BEFORE_CALL_339 v_main_~s~0_BEFORE_CALL_523)) (.cse15 (* (- 1) v_main_~k~0_BEFORE_CALL_339 v_main_~q~0_BEFORE_CALL_488))) (let ((.cse9 (+ (* (- 2) v_main_~p~0_BEFORE_CALL_426) (* (- 2) .cse15) v_main_~q~0_BEFORE_CALL_488)) (.cse10 (+ (* (- 2) v_main_~r~0_BEFORE_CALL_470) (* 2 .cse16) v_main_~s~0_BEFORE_CALL_523))) (let ((.cse7 (* v_main_~y~0_BEFORE_CALL_545 .cse10)) (.cse8 (* .cse9 v_main_~x~0_BEFORE_CALL_534))) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_545 v_main_~r~0_BEFORE_CALL_470)) (.cse1 (* v_main_~p~0_BEFORE_CALL_426 v_main_~x~0_BEFORE_CALL_534)) (.cse4 (* v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse3 (* v_main_~k~0_BEFORE_CALL_339 v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse5 (* v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse2 (* v_main_~k~0_BEFORE_CALL_339 v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse6 (+ .cse7 .cse8))) (or (<= (+ (* .cse0 3) (* .cse1 3)) (+ (* .cse2 3) (* .cse3 3) .cse4 .cse5)) (= (+ (* .cse6 v_main_~y~0_BEFORE_CALL_545) .cse7 .cse8) (+ (* .cse9 v_main_~xy~0_BEFORE_CALL_185) .cse7 (* v_main_~yy~0_BEFORE_CALL_181 .cse10) .cse8)) (not (<= (+ (* 2 .cse0) (* .cse1 2)) (+ .cse4 (* .cse3 2) .cse5 (* .cse2 2)))) (= .cse6 0) (not (let ((.cse13 (+ v_main_~r~0_BEFORE_CALL_470 (* (- 1) .cse16))) (.cse14 (+ v_main_~p~0_BEFORE_CALL_426 .cse15))) (let ((.cse11 (* v_main_~x~0_BEFORE_CALL_534 .cse14)) (.cse12 (* v_main_~y~0_BEFORE_CALL_545 .cse13))) (= (+ (* (+ .cse11 .cse12) v_main_~y~0_BEFORE_CALL_545) .cse11 .cse12) (+ .cse11 (* v_main_~yy~0_BEFORE_CALL_181 .cse13) (* v_main_~xy~0_BEFORE_CALL_185 .cse14) .cse12)))))))))))) is different from true [2022-04-06 22:40:58,987 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((v_main_~s~0_BEFORE_CALL_523 Int) (v_main_~p~0_BEFORE_CALL_426 Int) (v_main_~xy~0_BEFORE_CALL_185 Int) (v_main_~r~0_BEFORE_CALL_470 Int) (v_main_~x~0_BEFORE_CALL_534 Int) (v_main_~k~0_BEFORE_CALL_339 Int) (v_main_~q~0_BEFORE_CALL_488 Int) (v_main_~y~0_BEFORE_CALL_545 Int) (v_main_~yy~0_BEFORE_CALL_181 Int)) (let ((.cse16 (* v_main_~k~0_BEFORE_CALL_339 v_main_~s~0_BEFORE_CALL_523)) (.cse15 (* (- 1) v_main_~k~0_BEFORE_CALL_339 v_main_~q~0_BEFORE_CALL_488))) (let ((.cse9 (+ (* (- 2) v_main_~p~0_BEFORE_CALL_426) (* (- 2) .cse15) v_main_~q~0_BEFORE_CALL_488)) (.cse10 (+ (* (- 2) v_main_~r~0_BEFORE_CALL_470) (* 2 .cse16) v_main_~s~0_BEFORE_CALL_523))) (let ((.cse7 (* v_main_~y~0_BEFORE_CALL_545 .cse10)) (.cse8 (* .cse9 v_main_~x~0_BEFORE_CALL_534))) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_545 v_main_~r~0_BEFORE_CALL_470)) (.cse1 (* v_main_~p~0_BEFORE_CALL_426 v_main_~x~0_BEFORE_CALL_534)) (.cse4 (* v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse3 (* v_main_~k~0_BEFORE_CALL_339 v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse5 (* v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse2 (* v_main_~k~0_BEFORE_CALL_339 v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse6 (+ .cse7 .cse8))) (or (<= (+ (* .cse0 3) (* .cse1 3)) (+ (* .cse2 3) (* .cse3 3) .cse4 .cse5)) (= (+ (* .cse6 v_main_~y~0_BEFORE_CALL_545) .cse7 .cse8) (+ (* .cse9 v_main_~xy~0_BEFORE_CALL_185) .cse7 (* v_main_~yy~0_BEFORE_CALL_181 .cse10) .cse8)) (not (<= (+ (* 2 .cse0) (* .cse1 2)) (+ .cse4 (* .cse3 2) .cse5 (* .cse2 2)))) (= .cse6 0) (not (let ((.cse13 (+ v_main_~r~0_BEFORE_CALL_470 (* (- 1) .cse16))) (.cse14 (+ v_main_~p~0_BEFORE_CALL_426 .cse15))) (let ((.cse11 (* v_main_~x~0_BEFORE_CALL_534 .cse14)) (.cse12 (* v_main_~y~0_BEFORE_CALL_545 .cse13))) (= (+ (* (+ .cse11 .cse12) v_main_~y~0_BEFORE_CALL_545) .cse11 .cse12) (+ .cse11 (* v_main_~yy~0_BEFORE_CALL_181 .cse13) (* v_main_~xy~0_BEFORE_CALL_185 .cse14) .cse12)))))))))))) is different from true [2022-04-06 22:40:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 305 proven. 64 refuted. 33 times theorem prover too weak. 795 trivial. 13 not checked. [2022-04-06 22:40:59,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:40:59,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449545726] [2022-04-06 22:40:59,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:40:59,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061977155] [2022-04-06 22:40:59,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061977155] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:40:59,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:40:59,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2022-04-06 22:40:59,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:40:59,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [84031411] [2022-04-06 22:40:59,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [84031411] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:40:59,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:40:59,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 22:40:59,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209246122] [2022-04-06 22:40:59,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:40:59,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 22:40:59,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:40:59,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 22:40:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=939, Unknown=7, NotChecked=204, Total=1406 [2022-04-06 22:40:59,147 INFO L87 Difference]: Start difference. First operand 495 states and 627 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-04-06 22:41:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:41:05,361 INFO L93 Difference]: Finished difference Result 508 states and 638 transitions. [2022-04-06 22:41:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 22:41:05,361 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 176 [2022-04-06 22:41:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:41:05,363 INFO L225 Difference]: With dead ends: 508 [2022-04-06 22:41:05,363 INFO L226 Difference]: Without dead ends: 506 [2022-04-06 22:41:05,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 311 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=357, Invalid=1453, Unknown=8, NotChecked=252, Total=2070 [2022-04-06 22:41:05,364 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 50 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:41:05,365 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 285 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 22:41:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-04-06 22:41:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 503. [2022-04-06 22:41:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 286 states have (on average 1.1013986013986015) internal successors, (315), 289 states have internal predecessors, (315), 160 states have call successors, (160), 57 states have call predecessors, (160), 56 states have return successors, (158), 156 states have call predecessors, (158), 158 states have call successors, (158) [2022-04-06 22:41:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 633 transitions. [2022-04-06 22:41:05,489 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 633 transitions. Word has length 176 [2022-04-06 22:41:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:41:05,489 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 633 transitions. [2022-04-06 22:41:05,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-04-06 22:41:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 633 transitions. [2022-04-06 22:41:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 22:41:05,491 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:41:05,491 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:41:05,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 22:41:05,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:41:05,707 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:41:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:41:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1787962463, now seen corresponding path program 21 times [2022-04-06 22:41:05,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:41:05,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [482015503] [2022-04-06 22:41:05,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:41:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1787962463, now seen corresponding path program 22 times [2022-04-06 22:41:05,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:41:05,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719820930] [2022-04-06 22:41:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:41:05,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:41:05,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:41:05,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740076511] [2022-04-06 22:41:05,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:41:05,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:41:05,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:41:05,715 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:41:05,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 22:41:05,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:41:05,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:41:05,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 22:41:05,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:41:06,929 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:41:06,930 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:41:07,975 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:41:07,976 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:41:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 251 proven. 157 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2022-04-06 22:41:08,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:41:41,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:41:41,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719820930] [2022-04-06 22:41:41,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:41:41,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740076511] [2022-04-06 22:41:41,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740076511] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:41:41,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:41:41,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 22:41:41,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:41:41,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [482015503] [2022-04-06 22:41:41,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [482015503] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:41:41,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:41:41,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 22:41:41,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058384462] [2022-04-06 22:41:41,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:41:41,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 22:41:41,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:41:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 22:41:41,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=570, Unknown=13, NotChecked=0, Total=756 [2022-04-06 22:41:41,748 INFO L87 Difference]: Start difference. First operand 503 states and 633 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2022-04-06 22:41:45,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:41:45,417 INFO L93 Difference]: Finished difference Result 584 states and 740 transitions. [2022-04-06 22:41:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:41:45,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) Word has length 176 [2022-04-06 22:41:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:41:45,420 INFO L225 Difference]: With dead ends: 584 [2022-04-06 22:41:45,420 INFO L226 Difference]: Without dead ends: 582 [2022-04-06 22:41:45,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=228, Invalid=815, Unknown=13, NotChecked=0, Total=1056 [2022-04-06 22:41:45,421 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 34 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:41:45,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 348 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 22:41:45,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-04-06 22:41:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 579. [2022-04-06 22:41:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 327 states have (on average 1.1039755351681957) internal successors, (361), 330 states have internal predecessors, (361), 188 states have call successors, (188), 64 states have call predecessors, (188), 63 states have return successors, (186), 184 states have call predecessors, (186), 186 states have call successors, (186) [2022-04-06 22:41:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 735 transitions. [2022-04-06 22:41:45,543 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 735 transitions. Word has length 176 [2022-04-06 22:41:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:41:45,544 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 735 transitions. [2022-04-06 22:41:45,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2022-04-06 22:41:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 735 transitions. [2022-04-06 22:41:45,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 22:41:45,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:41:45,545 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:41:45,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 22:41:45,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 22:41:45,759 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:41:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:41:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 23 times [2022-04-06 22:41:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:41:45,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1315054652] [2022-04-06 22:41:45,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:41:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 24 times [2022-04-06 22:41:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:41:45,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197083665] [2022-04-06 22:41:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:41:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:41:45,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:41:45,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222433584] [2022-04-06 22:41:45,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:41:45,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:41:45,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:41:45,768 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:41:45,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 22:42:03,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:42:03,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:42:03,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 22:42:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:42:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 180 proven. 38 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2022-04-06 22:42:07,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:42:08,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:42:08,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197083665] [2022-04-06 22:42:08,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:42:08,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222433584] [2022-04-06 22:42:08,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222433584] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:42:08,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:42:08,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 22:42:08,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:42:08,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1315054652] [2022-04-06 22:42:08,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1315054652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:42:08,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:42:08,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 22:42:08,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541519361] [2022-04-06 22:42:08,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:42:08,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 22:42:08,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:42:08,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 22:42:08,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:42:08,137 INFO L87 Difference]: Start difference. First operand 579 states and 735 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 22:42:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:42:16,505 INFO L93 Difference]: Finished difference Result 621 states and 787 transitions. [2022-04-06 22:42:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 22:42:16,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) Word has length 179 [2022-04-06 22:42:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:42:16,508 INFO L225 Difference]: With dead ends: 621 [2022-04-06 22:42:16,508 INFO L226 Difference]: Without dead ends: 619 [2022-04-06 22:42:16,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 22:42:16,509 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:42:16,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 266 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 847 Invalid, 0 Unknown, 86 Unchecked, 3.6s Time] [2022-04-06 22:42:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-04-06 22:42:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 613. [2022-04-06 22:42:16,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 345 states have (on average 1.1043478260869566) internal successors, (381), 348 states have internal predecessors, (381), 200 states have call successors, (200), 68 states have call predecessors, (200), 67 states have return successors, (198), 196 states have call predecessors, (198), 198 states have call successors, (198) [2022-04-06 22:42:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 779 transitions. [2022-04-06 22:42:16,660 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 779 transitions. Word has length 179 [2022-04-06 22:42:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:42:16,660 INFO L478 AbstractCegarLoop]: Abstraction has 613 states and 779 transitions. [2022-04-06 22:42:16,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 22:42:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 779 transitions. [2022-04-06 22:42:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-04-06 22:42:16,662 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:42:16,662 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:42:16,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 22:42:16,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:42:16,869 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:42:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:42:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 17 times [2022-04-06 22:42:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:42:16,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [964612027] [2022-04-06 22:42:16,870 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:42:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 18 times [2022-04-06 22:42:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:42:16,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698408083] [2022-04-06 22:42:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:42:16,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:42:16,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:42:16,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585279229] [2022-04-06 22:42:16,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:42:16,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:42:16,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:42:16,877 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:42:16,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 22:42:16,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 22:42:16,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:42:17,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 22:42:17,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:42:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 107 proven. 63 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2022-04-06 22:42:18,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:42:18,387 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:18,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:42:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698408083] [2022-04-06 22:42:18,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:42:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585279229] [2022-04-06 22:42:18,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585279229] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:42:18,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:42:18,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 22:42:18,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:42:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [964612027] [2022-04-06 22:42:18,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [964612027] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:42:18,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:42:18,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:42:18,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764295242] [2022-04-06 22:42:18,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:42:18,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:42:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:42:18,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:42:18,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:42:18,520 INFO L87 Difference]: Start difference. First operand 613 states and 779 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 22:42:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:42:19,341 INFO L93 Difference]: Finished difference Result 622 states and 787 transitions. [2022-04-06 22:42:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:42:19,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 182 [2022-04-06 22:42:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:42:19,344 INFO L225 Difference]: With dead ends: 622 [2022-04-06 22:42:19,344 INFO L226 Difference]: Without dead ends: 619 [2022-04-06 22:42:19,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:42:19,344 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:42:19,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 256 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:42:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-04-06 22:42:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 596. [2022-04-06 22:42:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 336 states have (on average 1.1011904761904763) internal successors, (370), 338 states have internal predecessors, (370), 193 states have call successors, (193), 67 states have call predecessors, (193), 66 states have return successors, (191), 190 states have call predecessors, (191), 191 states have call successors, (191) [2022-04-06 22:42:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 754 transitions. [2022-04-06 22:42:19,484 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 754 transitions. Word has length 182 [2022-04-06 22:42:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:42:19,484 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 754 transitions. [2022-04-06 22:42:19,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 22:42:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 754 transitions. [2022-04-06 22:42:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-04-06 22:42:19,486 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:42:19,486 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:42:19,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 22:42:19,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:42:19,703 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:42:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:42:19,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 19 times [2022-04-06 22:42:19,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:42:19,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [932854150] [2022-04-06 22:42:19,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:42:19,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 20 times [2022-04-06 22:42:19,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:42:19,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754443795] [2022-04-06 22:42:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:42:19,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:42:19,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:42:19,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88096511] [2022-04-06 22:42:19,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:42:19,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:42:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:42:19,714 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:42:19,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 22:42:19,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:42:19,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:42:19,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 22:42:19,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:42:20,316 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:20,318 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:24,656 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:24,659 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:24,660 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:24,664 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:24,669 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:24,673 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:24,675 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:25,070 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:25,394 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:27,995 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:42:28,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:42:28,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754443795] [2022-04-06 22:42:28,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:42:28,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88096511] [2022-04-06 22:42:28,158 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-04-06 22:42:28,158 ERROR L250 FreeRefinementEngine]: Caught unknown exception: Infinite/NaN value [2022-04-06 22:42:28,158 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-04-06 22:42:28,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 22:42:28,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 22:42:28,359 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Infinite/NaN value at de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:467) at de.uni_freiburg.informatik.ultimate.logic.Rational.toTerm(Rational.java:921) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.div(SmtUtils.java:1663) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1448) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1378) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.convertApplicationTerm(SmtUtils.java:1367) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.Substitution.convertApplicationTerm(Substitution.java:53) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.Substitution.apply(Substitution.java:59) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.doSubstitutions(DualJunctionDer.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.applyReplacement(DualJunctionDer.java:400) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.applyReplacement(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:234) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:201) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:185) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:904) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateLight(PartialQuantifierElimination.java:111) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:129) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.runStrategy(AcceleratedInterpolationCore.java:300) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:203) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:412) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-04-06 22:42:28,363 INFO L158 Benchmark]: Toolchain (without parser) took 611962.82ms. Allocated memory was 205.5MB in the beginning and 323.0MB in the end (delta: 117.4MB). Free memory was 157.1MB in the beginning and 234.9MB in the end (delta: -77.8MB). Peak memory consumption was 40.1MB. Max. memory is 8.0GB. [2022-04-06 22:42:28,363 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 205.5MB. Free memory is still 173.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 22:42:28,363 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.82ms. Allocated memory is still 205.5MB. Free memory was 156.9MB in the beginning and 181.7MB in the end (delta: -24.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 22:42:28,363 INFO L158 Benchmark]: Boogie Preprocessor took 20.58ms. Allocated memory is still 205.5MB. Free memory was 181.7MB in the beginning and 180.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 22:42:28,363 INFO L158 Benchmark]: RCFGBuilder took 190.02ms. Allocated memory is still 205.5MB. Free memory was 180.4MB in the beginning and 168.8MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 22:42:28,363 INFO L158 Benchmark]: TraceAbstraction took 611537.26ms. Allocated memory was 205.5MB in the beginning and 323.0MB in the end (delta: 117.4MB). Free memory was 168.2MB in the beginning and 234.9MB in the end (delta: -66.7MB). Peak memory consumption was 51.1MB. Max. memory is 8.0GB. [2022-04-06 22:42:28,364 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 205.5MB. Free memory is still 173.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 211.82ms. Allocated memory is still 205.5MB. Free memory was 156.9MB in the beginning and 181.7MB in the end (delta: -24.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.58ms. Allocated memory is still 205.5MB. Free memory was 181.7MB in the beginning and 180.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 190.02ms. Allocated memory is still 205.5MB. Free memory was 180.4MB in the beginning and 168.8MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 611537.26ms. Allocated memory was 205.5MB in the beginning and 323.0MB in the end (delta: 117.4MB). Free memory was 168.2MB in the beginning and 234.9MB in the end (delta: -66.7MB). Peak memory consumption was 51.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Infinite/NaN value de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Infinite/NaN value: de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:467) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-04-06 22:42:28,569 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-04-06 22:42:28,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...