/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 15:10:00,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 15:10:00,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 15:10:00,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 15:10:00,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 15:10:00,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 15:10:00,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 15:10:00,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 15:10:00,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 15:10:00,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 15:10:00,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 15:10:00,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 15:10:00,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 15:10:00,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 15:10:00,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 15:10:00,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 15:10:00,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 15:10:00,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 15:10:00,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 15:10:00,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 15:10:00,776 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 15:10:00,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 15:10:00,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 15:10:00,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 15:10:00,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 15:10:00,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 15:10:00,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 15:10:00,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 15:10:00,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 15:10:00,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 15:10:00,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 15:10:00,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 15:10:00,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 15:10:00,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 15:10:00,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 15:10:00,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 15:10:00,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 15:10:00,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 15:10:00,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 15:10:00,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 15:10:00,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 15:10:00,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 15:10:00,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 15:10:00,802 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 15:10:00,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 15:10:00,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 15:10:00,804 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 15:10:00,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 15:10:00,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 15:10:00,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 15:10:00,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 15:10:00,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 15:10:00,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 15:10:00,805 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 15:10:00,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 15:10:00,805 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 15:10:00,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 15:10:00,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 15:10:00,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 15:10:00,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 15:10:00,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 15:10:00,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:10:00,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 15:10:00,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 15:10:00,806 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 15:10:00,806 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 15:10:00,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 15:10:00,806 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 15:10:00,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 15:10:00,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 15:10:01,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 15:10:01,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 15:10:01,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 15:10:01,021 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 15:10:01,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-04-06 15:10:01,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef9a29015/97cafb8a4701431cab23189d818d681d/FLAGd3beb4976 [2022-04-06 15:10:01,448 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 15:10:01,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-04-06 15:10:01,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef9a29015/97cafb8a4701431cab23189d818d681d/FLAGd3beb4976 [2022-04-06 15:10:01,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef9a29015/97cafb8a4701431cab23189d818d681d [2022-04-06 15:10:01,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 15:10:01,466 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 15:10:01,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 15:10:01,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 15:10:01,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 15:10:01,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:10:01" (1/1) ... [2022-04-06 15:10:01,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce9e232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01, skipping insertion in model container [2022-04-06 15:10:01,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:10:01" (1/1) ... [2022-04-06 15:10:01,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 15:10:01,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 15:10:01,618 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/egcd-ll.c[489,502] [2022-04-06 15:10:01,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:10:01,635 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 15:10:01,643 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/egcd-ll.c[489,502] [2022-04-06 15:10:01,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:10:01,656 INFO L208 MainTranslator]: Completed translation [2022-04-06 15:10:01,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01 WrapperNode [2022-04-06 15:10:01,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 15:10:01,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 15:10:01,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 15:10:01,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 15:10:01,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01" (1/1) ... [2022-04-06 15:10:01,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01" (1/1) ... [2022-04-06 15:10:01,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01" (1/1) ... [2022-04-06 15:10:01,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01" (1/1) ... [2022-04-06 15:10:01,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01" (1/1) ... [2022-04-06 15:10:01,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01" (1/1) ... [2022-04-06 15:10:01,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01" (1/1) ... [2022-04-06 15:10:01,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 15:10:01,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 15:10:01,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 15:10:01,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 15:10:01,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01" (1/1) ... [2022-04-06 15:10:01,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:10:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:01,716 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 15:10:01,723 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 15:10:01,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 15:10:01,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 15:10:01,758 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 15:10:01,758 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 15:10:01,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 15:10:01,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 15:10:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 15:10:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 15:10:01,806 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 15:10:01,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 15:10:01,917 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 15:10:01,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 15:10:01,921 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 15:10:01,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:10:01 BoogieIcfgContainer [2022-04-06 15:10:01,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 15:10:01,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 15:10:01,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 15:10:01,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 15:10:01,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 03:10:01" (1/3) ... [2022-04-06 15:10:01,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776849d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:10:01, skipping insertion in model container [2022-04-06 15:10:01,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:10:01" (2/3) ... [2022-04-06 15:10:01,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776849d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:10:01, skipping insertion in model container [2022-04-06 15:10:01,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:10:01" (3/3) ... [2022-04-06 15:10:01,929 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll.c [2022-04-06 15:10:01,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 15:10:01,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 15:10:02,018 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 15:10:02,033 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 15:10:02,033 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 15:10:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 15:10:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 15:10:02,064 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:02,065 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:02,065 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2012836591, now seen corresponding path program 1 times [2022-04-06 15:10:02,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:02,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368099211] [2022-04-06 15:10:02,090 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:02,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2012836591, now seen corresponding path program 2 times [2022-04-06 15:10:02,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:02,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734720389] [2022-04-06 15:10:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:02,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:02,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:10:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:02,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:10:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:02,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:10:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:10:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 15:10:02,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:02,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734720389] [2022-04-06 15:10:02,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734720389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:02,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:02,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 15:10:02,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:02,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368099211] [2022-04-06 15:10:02,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368099211] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:02,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:02,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 15:10:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755882266] [2022-04-06 15:10:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:02,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 15:10:02,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:02,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 15:10:02,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 15:10:02,329 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:02,437 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2022-04-06 15:10:02,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 15:10:02,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 15:10:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:02,445 INFO L225 Difference]: With dead ends: 61 [2022-04-06 15:10:02,446 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 15:10:02,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 15:10:02,452 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:02,453 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:10:02,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 15:10:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 15:10:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 15:10:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-04-06 15:10:02,493 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 22 [2022-04-06 15:10:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:02,493 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-04-06 15:10:02,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:10:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-04-06 15:10:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 15:10:02,496 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:02,496 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:02,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 15:10:02,497 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:02,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1952740121, now seen corresponding path program 1 times [2022-04-06 15:10:02,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:02,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1150443445] [2022-04-06 15:10:02,499 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:02,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1952740121, now seen corresponding path program 2 times [2022-04-06 15:10:02,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:02,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787073320] [2022-04-06 15:10:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:02,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:02,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:02,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905616458] [2022-04-06 15:10:02,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:02,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:02,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:02,532 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 15:10:02,533 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 15:10:02,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 15:10:02,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:02,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:10:02,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 15:10:02,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:10:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:02,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787073320] [2022-04-06 15:10:02,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:02,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905616458] [2022-04-06 15:10:02,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905616458] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:02,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:02,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:10:02,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:02,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1150443445] [2022-04-06 15:10:02,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1150443445] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:02,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:02,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:10:02,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958460103] [2022-04-06 15:10:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:02,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:10:02,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:10:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:10:02,729 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:10:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:02,788 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-04-06 15:10:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:10:02,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-04-06 15:10:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:02,790 INFO L225 Difference]: With dead ends: 45 [2022-04-06 15:10:02,790 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 15:10:02,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 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 15:10:02,791 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:02,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 123 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:10:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 15:10:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-06 15:10:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 15:10:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2022-04-06 15:10:02,800 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 22 [2022-04-06 15:10:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:02,800 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2022-04-06 15:10:02,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 15:10:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2022-04-06 15:10:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 15:10:02,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:02,801 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:02,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 15:10:03,020 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 15:10:03,020 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash 652987931, now seen corresponding path program 1 times [2022-04-06 15:10:03,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:03,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636085359] [2022-04-06 15:10:03,022 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:03,023 INFO L85 PathProgramCache]: Analyzing trace with hash 652987931, now seen corresponding path program 2 times [2022-04-06 15:10:03,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:03,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116964667] [2022-04-06 15:10:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:03,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:03,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:03,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772243950] [2022-04-06 15:10:03,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:03,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:03,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:03,032 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 15:10:03,033 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 15:10:03,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:10:03,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:03,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 15:10:03,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:10:03,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:10:03,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:03,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116964667] [2022-04-06 15:10:03,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:03,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772243950] [2022-04-06 15:10:03,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772243950] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:03,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:03,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:10:03,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:03,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636085359] [2022-04-06 15:10:03,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636085359] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:03,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:03,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:10:03,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478173407] [2022-04-06 15:10:03,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:03,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:10:03,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:10:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-06 15:10:03,207 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 15:10:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:03,329 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-04-06 15:10:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:10:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-04-06 15:10:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:03,332 INFO L225 Difference]: With dead ends: 49 [2022-04-06 15:10:03,332 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 15:10:03,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:10:03,333 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:03,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 148 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:10:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 15:10:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 15:10:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 15:10:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-04-06 15:10:03,341 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 27 [2022-04-06 15:10:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:03,341 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-04-06 15:10:03,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 15:10:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-04-06 15:10:03,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 15:10:03,342 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:03,342 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:03,361 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 15:10:03,542 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 15:10:03,543 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1028398105, now seen corresponding path program 1 times [2022-04-06 15:10:03,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:03,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [363555029] [2022-04-06 15:10:03,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1028398105, now seen corresponding path program 2 times [2022-04-06 15:10:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:03,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858826002] [2022-04-06 15:10:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:03,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:03,562 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:03,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858187108] [2022-04-06 15:10:03,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:03,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:03,566 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 15:10:03,567 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 15:10:03,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:10:03,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:03,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 15:10:03,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 15:10:03,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 15:10:03,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:03,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858826002] [2022-04-06 15:10:03,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:03,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858187108] [2022-04-06 15:10:03,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858187108] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 15:10:03,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:10:03,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 15:10:03,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:03,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [363555029] [2022-04-06 15:10:03,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [363555029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:03,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:03,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:10:03,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599868227] [2022-04-06 15:10:03,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:03,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:10:03,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:10:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:10:03,845 INFO L87 Difference]: Start difference. First operand 46 states and 60 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 15:10:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:03,905 INFO L93 Difference]: Finished difference Result 71 states and 100 transitions. [2022-04-06 15:10:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:10:03,905 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-06 15:10:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:03,907 INFO L225 Difference]: With dead ends: 71 [2022-04-06 15:10:03,908 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 15:10:03,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:10:03,909 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:03,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 120 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:10:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 15:10:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-04-06 15:10:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 15:10:03,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2022-04-06 15:10:03,930 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 32 [2022-04-06 15:10:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:03,930 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2022-04-06 15:10:03,930 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 15:10:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2022-04-06 15:10:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 15:10:03,931 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:03,931 INFO L499 BasicCegarLoop]: trace histogram [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 15:10:03,950 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 15:10:04,132 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 15:10:04,132 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:04,133 INFO L85 PathProgramCache]: Analyzing trace with hash -134474469, now seen corresponding path program 1 times [2022-04-06 15:10:04,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:04,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [181551844] [2022-04-06 15:10:04,134 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash -134474469, now seen corresponding path program 2 times [2022-04-06 15:10:04,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:04,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368707184] [2022-04-06 15:10:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:04,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:04,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:04,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240765651] [2022-04-06 15:10:04,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:04,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:04,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:04,143 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 15:10:04,145 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 15:10:04,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:10:04,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:04,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 15:10:04,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 15:10:04,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:10:04,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:04,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368707184] [2022-04-06 15:10:04,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:04,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240765651] [2022-04-06 15:10:04,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240765651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:04,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:04,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:10:04,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:04,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [181551844] [2022-04-06 15:10:04,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [181551844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:04,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:04,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:10:04,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268009334] [2022-04-06 15:10:04,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:04,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:10:04,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:04,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:10:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:10:04,249 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 15:10:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:04,289 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2022-04-06 15:10:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:10:04,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-04-06 15:10:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:04,290 INFO L225 Difference]: With dead ends: 73 [2022-04-06 15:10:04,290 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 15:10:04,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 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 15:10:04,291 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:04,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 119 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:10:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 15:10:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 15:10:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 28 states have call successors, (28), 8 states have call predecessors, (28), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 15:10:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2022-04-06 15:10:04,304 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 38 [2022-04-06 15:10:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:04,305 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2022-04-06 15:10:04,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 15:10:04,305 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2022-04-06 15:10:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 15:10:04,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:04,306 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:04,325 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 15:10:04,519 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 15:10:04,519 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:04,520 INFO L85 PathProgramCache]: Analyzing trace with hash 251096952, now seen corresponding path program 1 times [2022-04-06 15:10:04,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:04,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1309637946] [2022-04-06 15:10:04,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 251096952, now seen corresponding path program 2 times [2022-04-06 15:10:04,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:04,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606891337] [2022-04-06 15:10:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:04,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:04,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:04,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317500485] [2022-04-06 15:10:04,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:04,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:04,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:04,529 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 15:10:04,530 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 15:10:04,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:10:04,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:04,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 15:10:04,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 15:10:04,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:10:04,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:04,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606891337] [2022-04-06 15:10:04,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:04,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317500485] [2022-04-06 15:10:04,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317500485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:04,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:04,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:10:04,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:04,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1309637946] [2022-04-06 15:10:04,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1309637946] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:04,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:04,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:10:04,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785210087] [2022-04-06 15:10:04,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:04,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:10:04,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:04,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:10:04,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:10:04,685 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 15:10:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:04,735 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2022-04-06 15:10:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:10:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-04-06 15:10:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:04,738 INFO L225 Difference]: With dead ends: 81 [2022-04-06 15:10:04,738 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 15:10:04,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 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 15:10:04,739 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:04,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:10:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 15:10:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-04-06 15:10:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 15:10:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-04-06 15:10:04,750 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 40 [2022-04-06 15:10:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:04,750 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-04-06 15:10:04,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 15:10:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-04-06 15:10:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 15:10:04,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:04,751 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:04,771 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 15:10:04,962 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 15:10:04,963 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:04,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1098226535, now seen corresponding path program 1 times [2022-04-06 15:10:04,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [828605962] [2022-04-06 15:10:04,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1098226535, now seen corresponding path program 2 times [2022-04-06 15:10:04,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602818074] [2022-04-06 15:10:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:04,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:04,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:04,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542411817] [2022-04-06 15:10:04,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:04,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:04,973 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 15:10:04,975 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 15:10:05,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:10:05,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:05,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 15:10:05,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 15:10:05,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 15:10:05,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602818074] [2022-04-06 15:10:05,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:05,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542411817] [2022-04-06 15:10:05,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542411817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:05,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:05,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 15:10:05,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:05,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [828605962] [2022-04-06 15:10:05,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [828605962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:05,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:05,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:10:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948456309] [2022-04-06 15:10:05,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:05,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:10:05,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:10:05,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:10:05,244 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 15:10:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:05,349 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-04-06 15:10:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:10:05,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2022-04-06 15:10:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:05,351 INFO L225 Difference]: With dead ends: 85 [2022-04-06 15:10:05,351 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 15:10:05,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 15:10:05,352 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:05,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 121 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:10:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 15:10:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 15:10:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 15:10:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2022-04-06 15:10:05,363 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 43 [2022-04-06 15:10:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:05,363 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2022-04-06 15:10:05,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 15:10:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2022-04-06 15:10:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 15:10:05,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:05,364 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:05,383 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 15:10:05,578 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 15:10:05,578 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash -17648356, now seen corresponding path program 3 times [2022-04-06 15:10:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:05,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [625829272] [2022-04-06 15:10:05,579 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:05,579 INFO L85 PathProgramCache]: Analyzing trace with hash -17648356, now seen corresponding path program 4 times [2022-04-06 15:10:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:05,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780661403] [2022-04-06 15:10:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:05,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:05,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105858616] [2022-04-06 15:10:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:10:05,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:05,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:05,587 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 15:10:05,589 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 15:10:05,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:10:05,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:05,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 15:10:05,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 15:10:05,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 15:10:06,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780661403] [2022-04-06 15:10:06,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105858616] [2022-04-06 15:10:06,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105858616] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:06,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:06,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 15:10:06,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [625829272] [2022-04-06 15:10:06,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [625829272] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:06,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:06,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:10:06,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219134974] [2022-04-06 15:10:06,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:06,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:10:06,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:06,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:10:06,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:10:06,072 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 15:10:06,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:06,309 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-04-06 15:10:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:10:06,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-04-06 15:10:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:06,311 INFO L225 Difference]: With dead ends: 115 [2022-04-06 15:10:06,311 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 15:10:06,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:10:06,312 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:06,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 142 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:10:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 15:10:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2022-04-06 15:10:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 66 states have internal predecessors, (73), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 15:10:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-04-06 15:10:06,330 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 45 [2022-04-06 15:10:06,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:06,330 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-04-06 15:10:06,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 15:10:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-04-06 15:10:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 15:10:06,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:06,334 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-04-06 15:10:06,353 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 15:10:06,539 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 15:10:06,540 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363254, now seen corresponding path program 1 times [2022-04-06 15:10:06,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475658463] [2022-04-06 15:10:06,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:06,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363254, now seen corresponding path program 2 times [2022-04-06 15:10:06,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:06,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307294436] [2022-04-06 15:10:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:06,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:06,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171013995] [2022-04-06 15:10:06,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:06,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:06,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:06,556 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 15:10:06,558 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 15:10:06,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:10:06,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:06,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 15:10:06,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 15:10:06,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 15:10:06,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:06,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307294436] [2022-04-06 15:10:06,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:06,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171013995] [2022-04-06 15:10:06,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171013995] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:06,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:06,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-04-06 15:10:06,892 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:06,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475658463] [2022-04-06 15:10:06,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475658463] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:06,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:06,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:10:06,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156584218] [2022-04-06 15:10:06,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:06,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:10:06,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:06,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:10:06,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:10:06,894 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 15:10:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:07,035 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2022-04-06 15:10:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:10:07,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-04-06 15:10:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:07,036 INFO L225 Difference]: With dead ends: 134 [2022-04-06 15:10:07,037 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 15:10:07,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:10:07,037 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:07,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:10:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 15:10:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-04-06 15:10:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 76 states have internal predecessors, (85), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 15:10:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2022-04-06 15:10:07,053 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 50 [2022-04-06 15:10:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:07,053 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2022-04-06 15:10:07,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 15:10:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2022-04-06 15:10:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 15:10:07,054 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:07,054 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:07,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 15:10:07,267 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 15:10:07,267 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash -152607915, now seen corresponding path program 1 times [2022-04-06 15:10:07,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:07,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068814867] [2022-04-06 15:10:07,268 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash -152607915, now seen corresponding path program 2 times [2022-04-06 15:10:07,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:07,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528098559] [2022-04-06 15:10:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:07,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:07,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:07,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661204893] [2022-04-06 15:10:07,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:07,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:07,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:07,288 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 15:10:07,289 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 15:10:07,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:10:07,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:07,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 15:10:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 15:10:07,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 15:10:07,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:07,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528098559] [2022-04-06 15:10:07,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:07,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661204893] [2022-04-06 15:10:07,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661204893] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 15:10:07,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:10:07,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-06 15:10:07,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:07,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068814867] [2022-04-06 15:10:07,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068814867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:07,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:07,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:10:07,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963058358] [2022-04-06 15:10:07,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:07,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:10:07,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:07,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:10:07,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 15:10:07,597 INFO L87 Difference]: Start difference. First operand 128 states and 162 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 15:10:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:07,640 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2022-04-06 15:10:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:10:07,641 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2022-04-06 15:10:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:07,642 INFO L225 Difference]: With dead ends: 134 [2022-04-06 15:10:07,642 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 15:10:07,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:10:07,642 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:07,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 96 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:10:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 15:10:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-04-06 15:10:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 75 states have (on average 1.16) internal successors, (87), 78 states have internal predecessors, (87), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 15:10:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 159 transitions. [2022-04-06 15:10:07,656 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 159 transitions. Word has length 58 [2022-04-06 15:10:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:07,656 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 159 transitions. [2022-04-06 15:10:07,657 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 15:10:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 159 transitions. [2022-04-06 15:10:07,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 15:10:07,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:07,657 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:07,691 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 15:10:07,872 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 15:10:07,872 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1386725923, now seen corresponding path program 5 times [2022-04-06 15:10:07,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756172627] [2022-04-06 15:10:07,873 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1386725923, now seen corresponding path program 6 times [2022-04-06 15:10:07,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:07,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263028048] [2022-04-06 15:10:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:07,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:07,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696220470] [2022-04-06 15:10:07,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:10:07,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:07,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:07,890 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 15:10:07,919 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 15:10:07,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:10:07,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:07,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 15:10:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 15:10:08,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 15:10:08,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263028048] [2022-04-06 15:10:08,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696220470] [2022-04-06 15:10:08,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696220470] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:08,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:08,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-04-06 15:10:08,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756172627] [2022-04-06 15:10:08,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756172627] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:08,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:08,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 15:10:08,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094803356] [2022-04-06 15:10:08,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:08,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 15:10:08,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 15:10:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:10:08,361 INFO L87 Difference]: Start difference. First operand 129 states and 159 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 15:10:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:08,580 INFO L93 Difference]: Finished difference Result 163 states and 201 transitions. [2022-04-06 15:10:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 15:10:08,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-04-06 15:10:08,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:08,583 INFO L225 Difference]: With dead ends: 163 [2022-04-06 15:10:08,583 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 15:10:08,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:10:08,585 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 20 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:08,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 194 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:10:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 15:10:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2022-04-06 15:10:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 40 states have call successors, (40), 20 states have call predecessors, (40), 19 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 15:10:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2022-04-06 15:10:08,607 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 63 [2022-04-06 15:10:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:08,608 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2022-04-06 15:10:08,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 15:10:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2022-04-06 15:10:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 15:10:08,609 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:08,609 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-04-06 15:10:08,627 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 15:10:08,823 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 15:10:08,823 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash -522529, now seen corresponding path program 3 times [2022-04-06 15:10:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:08,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089260923] [2022-04-06 15:10:08,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash -522529, now seen corresponding path program 4 times [2022-04-06 15:10:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:08,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511021870] [2022-04-06 15:10:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:08,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:08,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:08,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817807957] [2022-04-06 15:10:08,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:10:08,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:08,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:08,835 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:10:08,836 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 15:10:08,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:10:08,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 15:10:08,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 15:10:09,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 15:10:09,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:09,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511021870] [2022-04-06 15:10:09,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:09,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817807957] [2022-04-06 15:10:09,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817807957] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:09,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:09,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 15:10:09,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089260923] [2022-04-06 15:10:09,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089260923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:09,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:09,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 15:10:09,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801746788] [2022-04-06 15:10:09,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:09,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 15:10:09,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:09,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 15:10:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:10:09,275 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 15:10:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:09,445 INFO L93 Difference]: Finished difference Result 185 states and 223 transitions. [2022-04-06 15:10:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 15:10:09,446 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), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-04-06 15:10:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:09,447 INFO L225 Difference]: With dead ends: 185 [2022-04-06 15:10:09,447 INFO L226 Difference]: Without dead ends: 183 [2022-04-06 15:10:09,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:10:09,447 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:09,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 181 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:10:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-06 15:10:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2022-04-06 15:10:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 105 states have internal predecessors, (116), 43 states have call successors, (43), 24 states have call predecessors, (43), 23 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 15:10:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2022-04-06 15:10:09,466 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 63 [2022-04-06 15:10:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:09,467 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2022-04-06 15:10:09,467 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), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 15:10:09,467 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2022-04-06 15:10:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 15:10:09,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:09,467 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:09,486 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 15:10:09,681 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 15:10:09,682 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1383919957, now seen corresponding path program 5 times [2022-04-06 15:10:09,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:09,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [46779481] [2022-04-06 15:10:09,683 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1383919957, now seen corresponding path program 6 times [2022-04-06 15:10:09,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:09,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797784759] [2022-04-06 15:10:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:09,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:09,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113395443] [2022-04-06 15:10:09,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:10:09,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:09,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:09,691 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 15:10:09,692 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 15:10:09,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:10:09,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:09,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 15:10:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 15:10:10,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 15:10:10,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:10,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797784759] [2022-04-06 15:10:10,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:10,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113395443] [2022-04-06 15:10:10,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113395443] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:10,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:10,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 15:10:10,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:10,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [46779481] [2022-04-06 15:10:10,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [46779481] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:10,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:10,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:10:10,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296562842] [2022-04-06 15:10:10,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:10,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:10:10,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:10:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 15:10:10,268 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 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 15:10:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:10,488 INFO L93 Difference]: Finished difference Result 191 states and 234 transitions. [2022-04-06 15:10:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:10:10,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 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 68 [2022-04-06 15:10:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:10,489 INFO L225 Difference]: With dead ends: 191 [2022-04-06 15:10:10,489 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 15:10:10,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:10:10,490 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:10,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 147 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:10:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 15:10:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2022-04-06 15:10:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 107 states have internal predecessors, (117), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 15:10:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2022-04-06 15:10:10,505 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 68 [2022-04-06 15:10:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:10,506 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2022-04-06 15:10:10,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 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 15:10:10,506 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2022-04-06 15:10:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 15:10:10,506 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:10,506 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:10,523 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 15:10:10,719 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 15:10:10,719 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:10,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash -860063341, now seen corresponding path program 3 times [2022-04-06 15:10:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:10,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1707845541] [2022-04-06 15:10:10,720 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash -860063341, now seen corresponding path program 4 times [2022-04-06 15:10:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:10,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946677071] [2022-04-06 15:10:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:10,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:10,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:10,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887774817] [2022-04-06 15:10:10,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:10:10,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:10,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:10,728 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 15:10:10,729 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 15:10:10,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:10:10,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 15:10:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 15:10:11,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 15:10:11,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:11,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946677071] [2022-04-06 15:10:11,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:11,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887774817] [2022-04-06 15:10:11,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887774817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:11,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:11,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-04-06 15:10:11,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:11,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1707845541] [2022-04-06 15:10:11,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1707845541] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:11,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:11,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:10:11,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952221718] [2022-04-06 15:10:11,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:11,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:10:11,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:11,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:10:11,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 15:10:11,271 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 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 15:10:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:11,544 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2022-04-06 15:10:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:10:11,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 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 68 [2022-04-06 15:10:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:11,546 INFO L225 Difference]: With dead ends: 197 [2022-04-06 15:10:11,546 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 15:10:11,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:10:11,548 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:11,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 130 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:10:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 15:10:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-04-06 15:10:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 116 states have internal predecessors, (128), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (49), 46 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-06 15:10:11,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2022-04-06 15:10:11,568 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 68 [2022-04-06 15:10:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:11,568 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2022-04-06 15:10:11,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 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 15:10:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2022-04-06 15:10:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 15:10:11,574 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:11,574 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:11,593 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 15:10:11,784 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 15:10:11,784 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:11,785 INFO L85 PathProgramCache]: Analyzing trace with hash -35686306, now seen corresponding path program 7 times [2022-04-06 15:10:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:11,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1857442626] [2022-04-06 15:10:11,785 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:11,785 INFO L85 PathProgramCache]: Analyzing trace with hash -35686306, now seen corresponding path program 8 times [2022-04-06 15:10:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:11,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158026916] [2022-04-06 15:10:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:11,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:11,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767188899] [2022-04-06 15:10:11,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:11,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:11,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:11,798 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 15:10:11,799 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 15:10:11,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:10:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:11,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 15:10:11,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 15:10:12,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 15:10:12,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158026916] [2022-04-06 15:10:12,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767188899] [2022-04-06 15:10:12,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767188899] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:12,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:12,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 15:10:12,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:12,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1857442626] [2022-04-06 15:10:12,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1857442626] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:12,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:12,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:10:12,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107544393] [2022-04-06 15:10:12,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:12,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:10:12,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:12,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:10:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 15:10:12,403 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 15:10:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:12,607 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2022-04-06 15:10:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:10:12,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2022-04-06 15:10:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:12,609 INFO L225 Difference]: With dead ends: 222 [2022-04-06 15:10:12,609 INFO L226 Difference]: Without dead ends: 220 [2022-04-06 15:10:12,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:10:12,610 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:12,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 200 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:10:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-04-06 15:10:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-04-06 15:10:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 130 states have (on average 1.146153846153846) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 15:10:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 261 transitions. [2022-04-06 15:10:12,631 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 261 transitions. Word has length 81 [2022-04-06 15:10:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:12,632 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 261 transitions. [2022-04-06 15:10:12,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 15:10:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 261 transitions. [2022-04-06 15:10:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 15:10:12,633 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:12,633 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:12,653 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 15:10:12,841 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 15:10:12,841 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1350517088, now seen corresponding path program 7 times [2022-04-06 15:10:12,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:12,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1507020247] [2022-04-06 15:10:12,842 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1350517088, now seen corresponding path program 8 times [2022-04-06 15:10:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:12,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741955710] [2022-04-06 15:10:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:12,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:12,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:12,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306600025] [2022-04-06 15:10:12,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:12,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:12,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:12,855 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 15:10:12,856 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 15:10:12,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:10:12,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:12,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 15:10:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 42 proven. 53 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 15:10:14,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 15:10:15,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741955710] [2022-04-06 15:10:15,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306600025] [2022-04-06 15:10:15,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306600025] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:15,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:15,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-04-06 15:10:15,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1507020247] [2022-04-06 15:10:15,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1507020247] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:15,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:15,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 15:10:15,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589166559] [2022-04-06 15:10:15,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:15,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 15:10:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:15,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 15:10:15,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-04-06 15:10:15,789 INFO L87 Difference]: Start difference. First operand 216 states and 261 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 15:10:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:18,953 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2022-04-06 15:10:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 15:10:18,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 81 [2022-04-06 15:10:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:18,955 INFO L225 Difference]: With dead ends: 257 [2022-04-06 15:10:18,955 INFO L226 Difference]: Without dead ends: 255 [2022-04-06 15:10:18,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:10:18,955 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:18,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 181 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 15:10:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-04-06 15:10:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 221. [2022-04-06 15:10:18,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 138 states have internal predecessors, (153), 55 states have call successors, (55), 31 states have call predecessors, (55), 30 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 15:10:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2022-04-06 15:10:18,979 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 81 [2022-04-06 15:10:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:18,979 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2022-04-06 15:10:18,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 15:10:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2022-04-06 15:10:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 15:10:18,980 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:18,980 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:18,999 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 15:10:19,195 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 15:10:19,195 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash -388774688, now seen corresponding path program 9 times [2022-04-06 15:10:19,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:19,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [708748759] [2022-04-06 15:10:19,196 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash -388774688, now seen corresponding path program 10 times [2022-04-06 15:10:19,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:19,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372512891] [2022-04-06 15:10:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:19,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:19,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:19,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989947379] [2022-04-06 15:10:19,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:10:19,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:19,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:19,205 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 15:10:19,207 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 15:10:19,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:10:19,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:19,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 15:10:19,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 59 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 15:10:19,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 15:10:20,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372512891] [2022-04-06 15:10:20,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989947379] [2022-04-06 15:10:20,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989947379] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:20,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:20,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 15:10:20,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:20,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [708748759] [2022-04-06 15:10:20,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [708748759] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:20,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:20,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:10:20,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080077828] [2022-04-06 15:10:20,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:20,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:10:20,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:20,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:10:20,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:10:20,049 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 15:10:20,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:20,519 INFO L93 Difference]: Finished difference Result 261 states and 313 transitions. [2022-04-06 15:10:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:10:20,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 81 [2022-04-06 15:10:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:20,521 INFO L225 Difference]: With dead ends: 261 [2022-04-06 15:10:20,521 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 15:10:20,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:10:20,522 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:20,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 199 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 15:10:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 15:10:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 223. [2022-04-06 15:10:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 140 states have internal predecessors, (154), 56 states have call successors, (56), 31 states have call predecessors, (56), 30 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 15:10:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2022-04-06 15:10:20,547 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 81 [2022-04-06 15:10:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:20,548 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2022-04-06 15:10:20,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 15:10:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2022-04-06 15:10:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 15:10:20,548 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:20,548 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:20,565 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 15:10:20,755 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 15:10:20,755 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash 997428706, now seen corresponding path program 11 times [2022-04-06 15:10:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:20,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [314753231] [2022-04-06 15:10:20,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash 997428706, now seen corresponding path program 12 times [2022-04-06 15:10:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:20,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161746380] [2022-04-06 15:10:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:20,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:20,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:20,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384465920] [2022-04-06 15:10:20,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:10:20,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:20,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:20,769 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 15:10:20,804 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 15:10:20,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:10:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:20,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 15:10:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-04-06 15:10:21,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:25,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:25,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161746380] [2022-04-06 15:10:25,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:25,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384465920] [2022-04-06 15:10:25,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384465920] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:10:25,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:10:25,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 15:10:25,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:25,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [314753231] [2022-04-06 15:10:25,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [314753231] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:25,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:25,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 15:10:25,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972642931] [2022-04-06 15:10:25,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:25,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 15:10:25,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 15:10:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=162, Unknown=1, NotChecked=0, Total=210 [2022-04-06 15:10:25,051 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 15:10:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:25,468 INFO L93 Difference]: Finished difference Result 282 states and 346 transitions. [2022-04-06 15:10:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 15:10:25,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-04-06 15:10:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:25,470 INFO L225 Difference]: With dead ends: 282 [2022-04-06 15:10:25,470 INFO L226 Difference]: Without dead ends: 276 [2022-04-06 15:10:25,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2022-04-06 15:10:25,471 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:25,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 162 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 15:10:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-04-06 15:10:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 233. [2022-04-06 15:10:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 142 states have (on average 1.119718309859155) internal successors, (159), 147 states have internal predecessors, (159), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (56), 52 states have call predecessors, (56), 56 states have call successors, (56) [2022-04-06 15:10:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 273 transitions. [2022-04-06 15:10:25,500 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 273 transitions. Word has length 81 [2022-04-06 15:10:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:25,500 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 273 transitions. [2022-04-06 15:10:25,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 15:10:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 273 transitions. [2022-04-06 15:10:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 15:10:25,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:25,501 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:25,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 15:10:25,718 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 15:10:25,719 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:25,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:25,719 INFO L85 PathProgramCache]: Analyzing trace with hash 327884660, now seen corresponding path program 13 times [2022-04-06 15:10:25,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:25,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438421054] [2022-04-06 15:10:25,720 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash 327884660, now seen corresponding path program 14 times [2022-04-06 15:10:25,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:25,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19129115] [2022-04-06 15:10:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:25,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:25,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:25,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117092418] [2022-04-06 15:10:25,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:10:25,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:25,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:25,728 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 15:10:25,730 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 15:10:25,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:10:25,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:25,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 15:10:25,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 15:10:26,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 15:10:26,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:26,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19129115] [2022-04-06 15:10:26,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:26,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117092418] [2022-04-06 15:10:26,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117092418] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:26,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:26,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 15:10:26,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:26,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438421054] [2022-04-06 15:10:26,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438421054] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:26,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:26,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:10:26,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936531715] [2022-04-06 15:10:26,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:26,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:10:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:10:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 15:10:26,644 INFO L87 Difference]: Start difference. First operand 233 states and 273 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 15:10:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:27,042 INFO L93 Difference]: Finished difference Result 255 states and 307 transitions. [2022-04-06 15:10:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:10:27,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-04-06 15:10:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:27,043 INFO L225 Difference]: With dead ends: 255 [2022-04-06 15:10:27,043 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 15:10:27,044 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:10:27,044 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:27,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 205 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 15:10:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 15:10:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 236. [2022-04-06 15:10:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 143 states have (on average 1.118881118881119) internal successors, (160), 149 states have internal predecessors, (160), 60 states have call successors, (60), 33 states have call predecessors, (60), 32 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-06 15:10:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 278 transitions. [2022-04-06 15:10:27,077 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 278 transitions. Word has length 86 [2022-04-06 15:10:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:27,078 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 278 transitions. [2022-04-06 15:10:27,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 15:10:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 278 transitions. [2022-04-06 15:10:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 15:10:27,079 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:27,079 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:27,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 15:10:27,294 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 15:10:27,295 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1916098638, now seen corresponding path program 15 times [2022-04-06 15:10:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:27,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704092130] [2022-04-06 15:10:27,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:27,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1916098638, now seen corresponding path program 16 times [2022-04-06 15:10:27,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:27,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131605050] [2022-04-06 15:10:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:27,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:27,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:27,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111072579] [2022-04-06 15:10:27,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:10:27,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:27,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:27,320 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 15:10:27,339 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 15:10:27,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:10:27,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:27,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 15:10:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:28,630 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:10:28,728 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:10:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 79 proven. 45 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-04-06 15:10:28,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 15:10:29,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:29,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131605050] [2022-04-06 15:10:29,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:29,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111072579] [2022-04-06 15:10:29,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111072579] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:29,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:29,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 15:10:29,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:29,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704092130] [2022-04-06 15:10:29,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704092130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:29,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:29,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:10:29,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942365718] [2022-04-06 15:10:29,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:29,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:10:29,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:29,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:10:29,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:10:29,246 INFO L87 Difference]: Start difference. First operand 236 states and 278 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 15:10:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:10:32,031 INFO L93 Difference]: Finished difference Result 282 states and 338 transitions. [2022-04-06 15:10:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 15:10:32,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-04-06 15:10:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:10:32,033 INFO L225 Difference]: With dead ends: 282 [2022-04-06 15:10:32,033 INFO L226 Difference]: Without dead ends: 272 [2022-04-06 15:10:32,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-04-06 15:10:32,034 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:10:32,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 237 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 15:10:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-04-06 15:10:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-04-06 15:10:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 161 states have internal predecessors, (173), 63 states have call successors, (63), 36 states have call predecessors, (63), 35 states have return successors, (61), 56 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 15:10:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 297 transitions. [2022-04-06 15:10:32,094 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 297 transitions. Word has length 86 [2022-04-06 15:10:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:10:32,095 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 297 transitions. [2022-04-06 15:10:32,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 15:10:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 297 transitions. [2022-04-06 15:10:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 15:10:32,096 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:10:32,096 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:10:32,113 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 15:10:32,304 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 15:10:32,304 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:10:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:10:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1866224690, now seen corresponding path program 17 times [2022-04-06 15:10:32,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:32,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1728829906] [2022-04-06 15:10:32,305 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:10:32,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1866224690, now seen corresponding path program 18 times [2022-04-06 15:10:32,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:10:32,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844691501] [2022-04-06 15:10:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:10:32,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:10:32,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:10:32,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472305108] [2022-04-06 15:10:32,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:10:32,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:10:32,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:10:32,314 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 15:10:32,318 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 15:10:32,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:10:32,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:10:32,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 15:10:32,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:10:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-04-06 15:10:34,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:10:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 15:10:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:10:41,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844691501] [2022-04-06 15:10:41,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:10:41,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472305108] [2022-04-06 15:10:41,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472305108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:10:41,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:10:41,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 15:10:41,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:10:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1728829906] [2022-04-06 15:10:41,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1728829906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:10:41,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:10:41,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 15:10:41,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560475358] [2022-04-06 15:10:41,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:10:41,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 15:10:41,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:10:41,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 15:10:41,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=143, Unknown=3, NotChecked=0, Total=182 [2022-04-06 15:10:41,102 INFO L87 Difference]: Start difference. First operand 254 states and 297 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 15:10:43,258 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 15:10:44,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:10:48,790 WARN L534 Checker$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 15:10:50,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:10:52,119 WARN L534 Checker$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 15:10:54,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:10:56,223 WARN L534 Checker$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 15:10:58,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:11:00,300 WARN L534 Checker$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 15:11:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:00,506 INFO L93 Difference]: Finished difference Result 283 states and 334 transitions. [2022-04-06 15:11:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:11:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2022-04-06 15:11:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:00,507 INFO L225 Difference]: With dead ends: 283 [2022-04-06 15:11:00,507 INFO L226 Difference]: Without dead ends: 269 [2022-04-06 15:11:00,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=55, Invalid=214, Unknown=3, NotChecked=0, Total=272 [2022-04-06 15:11:00,508 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 21 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:00,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 160 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 380 Invalid, 7 Unknown, 0 Unchecked, 18.1s Time] [2022-04-06 15:11:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-04-06 15:11:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2022-04-06 15:11:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 166 states have (on average 1.1144578313253013) internal successors, (185), 170 states have internal predecessors, (185), 64 states have call successors, (64), 38 states have call predecessors, (64), 37 states have return successors, (62), 59 states have call predecessors, (62), 62 states have call successors, (62) [2022-04-06 15:11:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 311 transitions. [2022-04-06 15:11:00,549 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 311 transitions. Word has length 86 [2022-04-06 15:11:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:00,550 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 311 transitions. [2022-04-06 15:11:00,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 15:11:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 311 transitions. [2022-04-06 15:11:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 15:11:00,551 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:00,551 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:00,568 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 15:11:00,768 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 15:11:00,768 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:00,769 INFO L85 PathProgramCache]: Analyzing trace with hash 396850335, now seen corresponding path program 9 times [2022-04-06 15:11:00,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:00,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [665832129] [2022-04-06 15:11:00,769 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:11:00,769 INFO L85 PathProgramCache]: Analyzing trace with hash 396850335, now seen corresponding path program 10 times [2022-04-06 15:11:00,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:00,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546056044] [2022-04-06 15:11:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:00,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:00,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:11:00,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575400746] [2022-04-06 15:11:00,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:11:00,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:00,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:00,775 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 15:11:00,776 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 15:11:00,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:11:00,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:11:00,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 15:11:00,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 70 proven. 112 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-04-06 15:11:01,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 102 proven. 26 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-04-06 15:11:02,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:02,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546056044] [2022-04-06 15:11:02,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:11:02,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575400746] [2022-04-06 15:11:02,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575400746] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:11:02,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:11:02,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 15:11:02,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:02,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [665832129] [2022-04-06 15:11:02,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [665832129] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:02,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:02,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:11:02,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295003304] [2022-04-06 15:11:02,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:02,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:11:02,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:11:02,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:11:02,204 INFO L87 Difference]: Start difference. First operand 268 states and 311 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-04-06 15:11:03,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:03,083 INFO L93 Difference]: Finished difference Result 298 states and 350 transitions. [2022-04-06 15:11:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:11:03,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 99 [2022-04-06 15:11:03,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:03,085 INFO L225 Difference]: With dead ends: 298 [2022-04-06 15:11:03,085 INFO L226 Difference]: Without dead ends: 296 [2022-04-06 15:11:03,086 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-04-06 15:11:03,086 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:03,086 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 225 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 15:11:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-04-06 15:11:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 292. [2022-04-06 15:11:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 181 states have (on average 1.1215469613259668) internal successors, (203), 185 states have internal predecessors, (203), 70 states have call successors, (70), 41 states have call predecessors, (70), 40 states have return successors, (68), 65 states have call predecessors, (68), 68 states have call successors, (68) [2022-04-06 15:11:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 341 transitions. [2022-04-06 15:11:03,145 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 341 transitions. Word has length 99 [2022-04-06 15:11:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:03,146 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 341 transitions. [2022-04-06 15:11:03,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-04-06 15:11:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 341 transitions. [2022-04-06 15:11:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 15:11:03,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:03,147 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:03,163 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 15:11:03,351 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 15:11:03,351 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1783053729, now seen corresponding path program 19 times [2022-04-06 15:11:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:03,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542206175] [2022-04-06 15:11:03,352 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:11:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1783053729, now seen corresponding path program 20 times [2022-04-06 15:11:03,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:03,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20027702] [2022-04-06 15:11:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:03,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:11:03,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42970594] [2022-04-06 15:11:03,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:11:03,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:03,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:03,363 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 15:11:03,364 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 15:11:03,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:11:03,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:11:03,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 15:11:03,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 15:11:04,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 15:11:04,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:04,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20027702] [2022-04-06 15:11:04,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:11:04,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42970594] [2022-04-06 15:11:04,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42970594] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:11:04,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:11:04,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 15:11:04,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:04,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1542206175] [2022-04-06 15:11:04,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1542206175] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:04,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:04,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 15:11:04,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914886365] [2022-04-06 15:11:04,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:04,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 15:11:04,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:04,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 15:11:04,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:11:04,539 INFO L87 Difference]: Start difference. First operand 292 states and 341 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 15:11:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:05,006 INFO L93 Difference]: Finished difference Result 333 states and 391 transitions. [2022-04-06 15:11:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 15:11:05,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 99 [2022-04-06 15:11:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:05,008 INFO L225 Difference]: With dead ends: 333 [2022-04-06 15:11:05,008 INFO L226 Difference]: Without dead ends: 331 [2022-04-06 15:11:05,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 15:11:05,009 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:05,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 245 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 15:11:05,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-04-06 15:11:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 297. [2022-04-06 15:11:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 186 states have (on average 1.1129032258064515) internal successors, (207), 189 states have internal predecessors, (207), 68 states have call successors, (68), 43 states have call predecessors, (68), 42 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-04-06 15:11:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 341 transitions. [2022-04-06 15:11:05,071 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 341 transitions. Word has length 99 [2022-04-06 15:11:05,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:05,072 INFO L478 AbstractCegarLoop]: Abstraction has 297 states and 341 transitions. [2022-04-06 15:11:05,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 15:11:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 341 transitions. [2022-04-06 15:11:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 15:11:05,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:05,073 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:05,091 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 15:11:05,283 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 15:11:05,283 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:05,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:05,284 INFO L85 PathProgramCache]: Analyzing trace with hash 43761953, now seen corresponding path program 21 times [2022-04-06 15:11:05,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:05,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [649647819] [2022-04-06 15:11:05,284 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:11:05,284 INFO L85 PathProgramCache]: Analyzing trace with hash 43761953, now seen corresponding path program 22 times [2022-04-06 15:11:05,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:05,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063164921] [2022-04-06 15:11:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:05,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:05,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:11:05,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042918990] [2022-04-06 15:11:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:11:05,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:05,291 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 15:11:05,292 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 15:11:05,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:11:05,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:11:05,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 15:11:05,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 80 proven. 84 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 15:11:06,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-04-06 15:11:06,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063164921] [2022-04-06 15:11:06,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:11:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042918990] [2022-04-06 15:11:06,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042918990] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:11:06,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:11:06,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 15:11:06,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:06,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [649647819] [2022-04-06 15:11:06,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [649647819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:06,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:06,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:11:06,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128025306] [2022-04-06 15:11:06,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:06,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:11:06,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:06,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:11:06,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:11:06,630 INFO L87 Difference]: Start difference. First operand 297 states and 341 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 15:11:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:08,102 INFO L93 Difference]: Finished difference Result 337 states and 393 transitions. [2022-04-06 15:11:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:11:08,102 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), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-04-06 15:11:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:08,104 INFO L225 Difference]: With dead ends: 337 [2022-04-06 15:11:08,104 INFO L226 Difference]: Without dead ends: 335 [2022-04-06 15:11:08,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:11:08,104 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:08,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 224 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 15:11:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-04-06 15:11:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 299. [2022-04-06 15:11:08,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 187 states have (on average 1.1122994652406417) internal successors, (208), 191 states have internal predecessors, (208), 69 states have call successors, (69), 43 states have call predecessors, (69), 42 states have return successors, (67), 64 states have call predecessors, (67), 67 states have call successors, (67) [2022-04-06 15:11:08,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 344 transitions. [2022-04-06 15:11:08,164 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 344 transitions. Word has length 99 [2022-04-06 15:11:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:08,164 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 344 transitions. [2022-04-06 15:11:08,164 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), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 15:11:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 344 transitions. [2022-04-06 15:11:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 15:11:08,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:08,165 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:08,185 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 15:11:08,379 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 15:11:08,379 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1429965347, now seen corresponding path program 23 times [2022-04-06 15:11:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712598743] [2022-04-06 15:11:08,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:11:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1429965347, now seen corresponding path program 24 times [2022-04-06 15:11:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564673216] [2022-04-06 15:11:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:08,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:08,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:11:08,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407660093] [2022-04-06 15:11:08,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:11:08,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:08,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:08,386 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 15:11:08,387 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 15:11:08,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:11:08,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:11:08,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 15:11:08,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-04-06 15:11:10,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:11,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564673216] [2022-04-06 15:11:11,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:11:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407660093] [2022-04-06 15:11:11,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407660093] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:11:11,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:11:11,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 15:11:11,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:11,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712598743] [2022-04-06 15:11:11,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712598743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:11,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:11,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 15:11:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133109073] [2022-04-06 15:11:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:11,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 15:11:11,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:11,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 15:11:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-04-06 15:11:11,084 INFO L87 Difference]: Start difference. First operand 299 states and 344 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 15:11:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:13,546 INFO L93 Difference]: Finished difference Result 375 states and 453 transitions. [2022-04-06 15:11:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 15:11:13,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 99 [2022-04-06 15:11:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:13,549 INFO L225 Difference]: With dead ends: 375 [2022-04-06 15:11:13,549 INFO L226 Difference]: Without dead ends: 369 [2022-04-06 15:11:13,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-04-06 15:11:13,550 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:13,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 177 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 15:11:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-04-06 15:11:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 346. [2022-04-06 15:11:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 213 states have (on average 1.1220657276995305) internal successors, (239), 218 states have internal predecessors, (239), 85 states have call successors, (85), 48 states have call predecessors, (85), 47 states have return successors, (83), 79 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 15:11:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 407 transitions. [2022-04-06 15:11:13,632 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 407 transitions. Word has length 99 [2022-04-06 15:11:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:13,632 INFO L478 AbstractCegarLoop]: Abstraction has 346 states and 407 transitions. [2022-04-06 15:11:13,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 15:11:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 407 transitions. [2022-04-06 15:11:13,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 15:11:13,633 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:13,633 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:13,641 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 15:11:13,841 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 15:11:13,842 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:13,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1289329503, now seen corresponding path program 25 times [2022-04-06 15:11:13,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:13,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2040285381] [2022-04-06 15:11:13,842 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:11:13,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1289329503, now seen corresponding path program 26 times [2022-04-06 15:11:13,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:13,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032240660] [2022-04-06 15:11:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:13,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:13,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:11:13,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144388486] [2022-04-06 15:11:13,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:11:13,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:13,848 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 15:11:13,849 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 15:11:13,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:11:13,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:11:13,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 15:11:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 98 proven. 66 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 15:11:17,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-04-06 15:11:18,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:18,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032240660] [2022-04-06 15:11:18,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:11:18,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144388486] [2022-04-06 15:11:18,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144388486] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:11:18,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:11:18,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 15:11:18,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:18,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2040285381] [2022-04-06 15:11:18,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2040285381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:18,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:18,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:11:18,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625397349] [2022-04-06 15:11:18,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:18,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:11:18,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:18,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:11:18,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:11:18,151 INFO L87 Difference]: Start difference. First operand 346 states and 407 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 15:11:20,926 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 15:11:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:21,292 INFO L93 Difference]: Finished difference Result 386 states and 459 transitions. [2022-04-06 15:11:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:11:21,292 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), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-04-06 15:11:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:21,294 INFO L225 Difference]: With dead ends: 386 [2022-04-06 15:11:21,294 INFO L226 Difference]: Without dead ends: 384 [2022-04-06 15:11:21,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:11:21,295 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:21,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 231 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 621 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 15:11:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-04-06 15:11:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 360. [2022-04-06 15:11:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 222 states have (on average 1.1216216216216217) internal successors, (249), 227 states have internal predecessors, (249), 88 states have call successors, (88), 50 states have call predecessors, (88), 49 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-06 15:11:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 423 transitions. [2022-04-06 15:11:21,379 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 423 transitions. Word has length 99 [2022-04-06 15:11:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:21,380 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 423 transitions. [2022-04-06 15:11:21,380 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), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 15:11:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 423 transitions. [2022-04-06 15:11:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 15:11:21,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:21,381 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:21,411 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 15:11:21,598 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 15:11:21,598 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:21,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:21,599 INFO L85 PathProgramCache]: Analyzing trace with hash 96873891, now seen corresponding path program 27 times [2022-04-06 15:11:21,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:21,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386708331] [2022-04-06 15:11:21,599 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:11:21,599 INFO L85 PathProgramCache]: Analyzing trace with hash 96873891, now seen corresponding path program 28 times [2022-04-06 15:11:21,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:21,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330053866] [2022-04-06 15:11:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:21,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:21,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:11:21,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124576026] [2022-04-06 15:11:21,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:11:21,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:21,605 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 15:11:21,606 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 15:11:21,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:11:21,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:11:21,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 15:11:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 84 proven. 56 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-06 15:11:22,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-04-06 15:11:22,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:22,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330053866] [2022-04-06 15:11:22,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:11:22,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124576026] [2022-04-06 15:11:22,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124576026] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:11:22,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:11:22,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-04-06 15:11:22,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:22,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386708331] [2022-04-06 15:11:22,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386708331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:22,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:22,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:11:22,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636629982] [2022-04-06 15:11:22,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:22,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:11:22,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:22,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:11:22,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-04-06 15:11:22,595 INFO L87 Difference]: Start difference. First operand 360 states and 423 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 15:11:27,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:11:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:29,461 INFO L93 Difference]: Finished difference Result 389 states and 464 transitions. [2022-04-06 15:11:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 15:11:29,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-04-06 15:11:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:29,463 INFO L225 Difference]: With dead ends: 389 [2022-04-06 15:11:29,463 INFO L226 Difference]: Without dead ends: 387 [2022-04-06 15:11:29,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:11:29,465 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:29,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 265 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 768 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-04-06 15:11:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-04-06 15:11:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 366. [2022-04-06 15:11:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 225 states have (on average 1.1244444444444444) internal successors, (253), 230 states have internal predecessors, (253), 91 states have call successors, (91), 50 states have call predecessors, (91), 49 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2022-04-06 15:11:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 433 transitions. [2022-04-06 15:11:29,563 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 433 transitions. Word has length 99 [2022-04-06 15:11:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:29,564 INFO L478 AbstractCegarLoop]: Abstraction has 366 states and 433 transitions. [2022-04-06 15:11:29,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 15:11:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 433 transitions. [2022-04-06 15:11:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 15:11:29,565 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:29,565 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:29,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 15:11:29,765 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 15:11:29,765 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:29,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1642417885, now seen corresponding path program 29 times [2022-04-06 15:11:29,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:29,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1066623516] [2022-04-06 15:11:29,766 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:11:29,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1642417885, now seen corresponding path program 30 times [2022-04-06 15:11:29,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:29,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247666519] [2022-04-06 15:11:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:29,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:29,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:11:29,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101181252] [2022-04-06 15:11:29,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:11:29,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:29,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:29,772 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 15:11:29,773 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 15:11:29,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:11:29,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:11:29,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 15:11:29,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 60 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-06 15:11:30,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-04-06 15:11:37,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:37,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247666519] [2022-04-06 15:11:37,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:11:37,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101181252] [2022-04-06 15:11:37,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101181252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:11:37,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:11:37,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 15:11:37,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:37,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1066623516] [2022-04-06 15:11:37,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1066623516] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:37,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:37,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 15:11:37,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660144549] [2022-04-06 15:11:37,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:37,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 15:11:37,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 15:11:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:11:37,185 INFO L87 Difference]: Start difference. First operand 366 states and 433 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 15:11:39,572 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 15:11:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:40,210 INFO L93 Difference]: Finished difference Result 427 states and 515 transitions. [2022-04-06 15:11:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:11:40,211 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 99 [2022-04-06 15:11:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:40,213 INFO L225 Difference]: With dead ends: 427 [2022-04-06 15:11:40,213 INFO L226 Difference]: Without dead ends: 425 [2022-04-06 15:11:40,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-04-06 15:11:40,213 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:40,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 151 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 355 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 15:11:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-04-06 15:11:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 386. [2022-04-06 15:11:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 236 states have (on average 1.11864406779661) internal successors, (264), 243 states have internal predecessors, (264), 97 states have call successors, (97), 53 states have call predecessors, (97), 52 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-06 15:11:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 456 transitions. [2022-04-06 15:11:40,324 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 456 transitions. Word has length 99 [2022-04-06 15:11:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:40,324 INFO L478 AbstractCegarLoop]: Abstraction has 386 states and 456 transitions. [2022-04-06 15:11:40,324 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 15:11:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 456 transitions. [2022-04-06 15:11:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 15:11:40,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:40,325 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:40,341 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 15:11:40,525 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 15:11:40,526 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:40,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:40,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1917559763, now seen corresponding path program 31 times [2022-04-06 15:11:40,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:40,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182431646] [2022-04-06 15:11:40,526 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:11:40,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1917559763, now seen corresponding path program 32 times [2022-04-06 15:11:40,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:40,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800227374] [2022-04-06 15:11:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:40,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:40,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:11:40,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520069300] [2022-04-06 15:11:40,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:11:40,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:40,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:40,536 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 15:11:40,538 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 15:11:40,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:11:40,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:11:40,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 15:11:40,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 15:11:40,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-04-06 15:11:41,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:41,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800227374] [2022-04-06 15:11:41,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:11:41,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520069300] [2022-04-06 15:11:41,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520069300] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:11:41,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:11:41,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 15:11:41,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:41,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182431646] [2022-04-06 15:11:41,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182431646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:41,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:41,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:11:41,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278776282] [2022-04-06 15:11:41,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:41,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:11:41,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:11:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 15:11:41,206 INFO L87 Difference]: Start difference. First operand 386 states and 456 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 15:11:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:41,567 INFO L93 Difference]: Finished difference Result 412 states and 493 transitions. [2022-04-06 15:11:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:11:41,567 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), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 104 [2022-04-06 15:11:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:41,569 INFO L225 Difference]: With dead ends: 412 [2022-04-06 15:11:41,569 INFO L226 Difference]: Without dead ends: 406 [2022-04-06 15:11:41,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:11:41,570 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 8 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:41,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 235 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:11:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-04-06 15:11:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 383. [2022-04-06 15:11:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 235 states have (on average 1.1191489361702127) internal successors, (263), 241 states have internal predecessors, (263), 95 states have call successors, (95), 53 states have call predecessors, (95), 52 states have return successors, (93), 88 states have call predecessors, (93), 93 states have call successors, (93) [2022-04-06 15:11:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 451 transitions. [2022-04-06 15:11:41,663 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 451 transitions. Word has length 104 [2022-04-06 15:11:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:41,663 INFO L478 AbstractCegarLoop]: Abstraction has 383 states and 451 transitions. [2022-04-06 15:11:41,663 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), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 15:11:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 451 transitions. [2022-04-06 15:11:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 15:11:41,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:41,664 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:41,680 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 15:11:41,875 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 15:11:41,875 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:41,875 INFO L85 PathProgramCache]: Analyzing trace with hash -326423535, now seen corresponding path program 33 times [2022-04-06 15:11:41,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:41,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690525135] [2022-04-06 15:11:41,876 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:11:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash -326423535, now seen corresponding path program 34 times [2022-04-06 15:11:41,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:41,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112950341] [2022-04-06 15:11:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:41,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:41,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:11:41,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585329857] [2022-04-06 15:11:41,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:11:41,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:41,892 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 15:11:41,893 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 15:11:41,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:11:41,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:11:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 15:11:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:11:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 104 proven. 114 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 15:11:42,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:11:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-04-06 15:11:43,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:11:43,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112950341] [2022-04-06 15:11:43,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:11:43,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585329857] [2022-04-06 15:11:43,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585329857] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:11:43,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:11:43,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 22 [2022-04-06 15:11:43,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:11:43,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690525135] [2022-04-06 15:11:43,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690525135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:11:43,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:11:43,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 15:11:43,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137750842] [2022-04-06 15:11:43,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:11:43,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 15:11:43,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:43,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 15:11:43,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-04-06 15:11:43,017 INFO L87 Difference]: Start difference. First operand 383 states and 451 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-04-06 15:11:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:11:44,362 INFO L93 Difference]: Finished difference Result 423 states and 504 transitions. [2022-04-06 15:11:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 15:11:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) Word has length 104 [2022-04-06 15:11:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:11:44,364 INFO L225 Difference]: With dead ends: 423 [2022-04-06 15:11:44,364 INFO L226 Difference]: Without dead ends: 413 [2022-04-06 15:11:44,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-04-06 15:11:44,365 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 37 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:11:44,365 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 151 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 15:11:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-04-06 15:11:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 395. [2022-04-06 15:11:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 244 states have (on average 1.1188524590163935) internal successors, (273), 250 states have internal predecessors, (273), 96 states have call successors, (96), 55 states have call predecessors, (96), 54 states have return successors, (94), 89 states have call predecessors, (94), 94 states have call successors, (94) [2022-04-06 15:11:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 463 transitions. [2022-04-06 15:11:44,470 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 463 transitions. Word has length 104 [2022-04-06 15:11:44,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:11:44,470 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 463 transitions. [2022-04-06 15:11:44,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-04-06 15:11:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 463 transitions. [2022-04-06 15:11:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 15:11:44,471 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:11:44,471 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:11:44,488 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 15:11:44,679 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 15:11:44,679 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:11:44,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:11:44,680 INFO L85 PathProgramCache]: Analyzing trace with hash -839067503, now seen corresponding path program 35 times [2022-04-06 15:11:44,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:11:44,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498213702] [2022-04-06 15:11:44,680 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:11:44,680 INFO L85 PathProgramCache]: Analyzing trace with hash -839067503, now seen corresponding path program 36 times [2022-04-06 15:11:44,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:11:44,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825232123] [2022-04-06 15:11:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:11:44,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:11:44,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:11:44,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220414121] [2022-04-06 15:11:44,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:11:44,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:11:44,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:11:44,688 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 15:11:44,689 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 15:11:45,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:11:45,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:11:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 15:11:45,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:06,260 WARN L232 SmtUtils]: Spent 5.23s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 15:12:18,302 WARN L833 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141 Int) (v_main_~y~0_BEFORE_CALL_395 Int) (aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95 Int) (v_main_~x~0_BEFORE_CALL_435 Int) (aux_div_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117 Int) (aux_div_v_main_~q~0_BEFORE_CALL_355_51 Int) (aux_div_v_main_~s~0_BEFORE_CALL_340_41 Int) (aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141_81 Int)) (let ((.cse2 (* aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141_81 2)) (.cse4 (* aux_div_v_main_~s~0_BEFORE_CALL_340_41 v_main_~y~0_BEFORE_CALL_395))) (let ((.cse3 (+ v_main_~x~0_BEFORE_CALL_435 (* .cse4 2))) (.cse0 (* aux_div_v_main_~q~0_BEFORE_CALL_355_51 2)) (.cse5 (* 2 aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95)) (.cse1 (+ (* 2 aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141) .cse2))) (and (<= .cse0 .cse1) (<= 0 .cse2) (<= (+ (* 2 (* aux_div_v_main_~q~0_BEFORE_CALL_355_51 v_main_~x~0_BEFORE_CALL_435)) v_main_~y~0_BEFORE_CALL_395) .cse3) (= (+ aux_div_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117 (* (* aux_div_v_main_~s~0_BEFORE_CALL_340_41 aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141_81) 2) (* (* aux_div_v_main_~s~0_BEFORE_CALL_340_41 aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141) 2) 1) (+ aux_div_v_main_~s~0_BEFORE_CALL_340_41 (* (* aux_div_v_main_~s~0_BEFORE_CALL_340_41 aux_div_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117) 2))) (not (= .cse3 (+ v_main_~y~0_BEFORE_CALL_395 (* 2 (* v_main_~x~0_BEFORE_CALL_435 aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141))))) (< .cse4 (* v_main_~x~0_BEFORE_CALL_435 aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95)) (< .cse2 2) (<= 1 v_main_~y~0_BEFORE_CALL_395) (<= 1 |c___VERIFIER_assert_#in~cond|) (< .cse1 (+ .cse5 2)) (< .cse1 (+ 2 .cse0)) (<= .cse5 .cse1))))) is different from false [2022-04-06 15:12:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 127 proven. 49 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 15:12:18,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 146 proven. 3 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-04-06 15:12:29,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:29,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825232123] [2022-04-06 15:12:29,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:29,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220414121] [2022-04-06 15:12:29,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220414121] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:29,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:29,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 24 [2022-04-06 15:12:29,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:29,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498213702] [2022-04-06 15:12:29,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498213702] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:29,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:29,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 15:12:29,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722784386] [2022-04-06 15:12:29,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:29,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 15:12:29,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:29,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 15:12:29,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=403, Unknown=5, NotChecked=42, Total=552 [2022-04-06 15:12:29,015 INFO L87 Difference]: Start difference. First operand 395 states and 463 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 15:12:32,079 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 15:13:24,456 WARN L232 SmtUtils]: Spent 49.97s on a formula simplification. DAG size of input: 65 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 15:13:26,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:13:28,462 WARN L534 Checker$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 15:13:30,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:13:32,468 WARN L534 Checker$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 15:13:34,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:13:40,410 WARN L534 Checker$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 15:13:42,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:13:44,444 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:13:46,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:13:48,578 WARN L534 Checker$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 15:13:50,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:13:52,582 WARN L534 Checker$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 15:13:53,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:13:55,903 WARN L534 Checker$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 15:13:57,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:01,620 WARN L534 Checker$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 15:14:03,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:05,627 WARN L534 Checker$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 15:14:07,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:10,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:12,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:14,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:16,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:18,672 WARN L534 Checker$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 15:14:20,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:22,677 WARN L534 Checker$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 15:14:24,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:27,955 WARN L534 Checker$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 15:14:30,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:31,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:33,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:35,412 WARN L534 Checker$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 15:14:38,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:14:40,526 WARN L534 Checker$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 15:14:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:14:42,213 INFO L93 Difference]: Finished difference Result 461 states and 568 transitions. [2022-04-06 15:14:42,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 15:14:42,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 104 [2022-04-06 15:14:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:14:42,216 INFO L225 Difference]: With dead ends: 461 [2022-04-06 15:14:42,216 INFO L226 Difference]: Without dead ends: 451 [2022-04-06 15:14:42,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 76.4s TimeCoverageRelationStatistics Valid=130, Invalid=570, Unknown=6, NotChecked=50, Total=756 [2022-04-06 15:14:42,216 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 30 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 25 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 80.8s IncrementalHoareTripleChecker+Time [2022-04-06 15:14:42,216 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 232 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 797 Invalid, 30 Unknown, 69 Unchecked, 80.8s Time] [2022-04-06 15:14:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-04-06 15:14:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 406. [2022-04-06 15:14:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 251 states have (on average 1.1195219123505975) internal successors, (281), 256 states have internal predecessors, (281), 100 states have call successors, (100), 56 states have call predecessors, (100), 54 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2022-04-06 15:14:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 479 transitions. [2022-04-06 15:14:42,337 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 479 transitions. Word has length 104 [2022-04-06 15:14:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:14:42,337 INFO L478 AbstractCegarLoop]: Abstraction has 406 states and 479 transitions. [2022-04-06 15:14:42,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 15:14:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 479 transitions. [2022-04-06 15:14:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 15:14:42,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:14:42,338 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:14:42,346 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 15:14:42,544 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 15:14:42,544 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:14:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:14:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash -468949743, now seen corresponding path program 37 times [2022-04-06 15:14:42,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:42,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2011807120] [2022-04-06 15:14:42,545 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:14:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash -468949743, now seen corresponding path program 38 times [2022-04-06 15:14:42,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:14:42,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803836857] [2022-04-06 15:14:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:14:42,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:14:42,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:14:42,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491767827] [2022-04-06 15:14:42,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:14:42,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:14:42,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:14:42,553 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 15:14:42,554 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 15:14:42,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:14:42,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:14:42,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 15:14:42,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:14:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 76 proven. 103 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-04-06 15:14:43,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:14:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 111 proven. 28 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-04-06 15:14:43,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:14:43,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803836857] [2022-04-06 15:14:43,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:14:43,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491767827] [2022-04-06 15:14:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491767827] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:14:43,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:14:43,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 15:14:43,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:14:43,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2011807120] [2022-04-06 15:14:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2011807120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:14:43,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:14:43,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:14:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394149255] [2022-04-06 15:14:43,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:14:43,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:14:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:14:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:14:43,628 INFO L87 Difference]: Start difference. First operand 406 states and 479 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 15:14:45,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:14:45,923 INFO L93 Difference]: Finished difference Result 428 states and 513 transitions. [2022-04-06 15:14:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:14:45,923 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), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 104 [2022-04-06 15:14:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:14:45,925 INFO L225 Difference]: With dead ends: 428 [2022-04-06 15:14:45,925 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 15:14:45,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:14:45,926 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:14:45,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 246 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 15:14:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 15:14:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2022-04-06 15:14:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 260 states have (on average 1.123076923076923) internal successors, (292), 265 states have internal predecessors, (292), 106 states have call successors, (106), 57 states have call predecessors, (106), 55 states have return successors, (104), 99 states have call predecessors, (104), 104 states have call successors, (104) [2022-04-06 15:14:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 502 transitions. [2022-04-06 15:14:46,054 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 502 transitions. Word has length 104 [2022-04-06 15:14:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:14:46,054 INFO L478 AbstractCegarLoop]: Abstraction has 422 states and 502 transitions. [2022-04-06 15:14:46,054 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), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 15:14:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 502 transitions. [2022-04-06 15:14:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 15:14:46,055 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:14:46,055 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:14:46,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 15:14:46,265 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 15:14:46,266 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:14:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:14:46,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1691864687, now seen corresponding path program 39 times [2022-04-06 15:14:46,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:46,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [933406705] [2022-04-06 15:14:46,267 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:14:46,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1691864687, now seen corresponding path program 40 times [2022-04-06 15:14:46,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:14:46,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418590770] [2022-04-06 15:14:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:14:46,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:14:46,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:14:46,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292648972] [2022-04-06 15:14:46,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:14:46,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:14:46,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:14:46,273 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 15:14:46,274 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 15:14:46,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:14:46,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:14:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 15:14:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:14:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 82 proven. 7 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2022-04-06 15:14:46,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:14:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 82 proven. 7 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2022-04-06 15:14:46,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:14:46,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418590770] [2022-04-06 15:14:46,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:14:46,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292648972] [2022-04-06 15:14:46,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292648972] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:14:46,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:14:46,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 15:14:46,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:14:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [933406705] [2022-04-06 15:14:46,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [933406705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:14:46,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:14:46,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 15:14:46,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65430349] [2022-04-06 15:14:46,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:14:46,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 15:14:46,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 15:14:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:14:46,574 INFO L87 Difference]: Start difference. First operand 422 states and 502 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 15:14:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:14:46,820 INFO L93 Difference]: Finished difference Result 446 states and 531 transitions. [2022-04-06 15:14:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 15:14:46,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 104 [2022-04-06 15:14:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:14:46,822 INFO L225 Difference]: With dead ends: 446 [2022-04-06 15:14:46,822 INFO L226 Difference]: Without dead ends: 436 [2022-04-06 15:14:46,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:14:46,823 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:14:46,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 90 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:14:46,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-04-06 15:14:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 397. [2022-04-06 15:14:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 243 states have (on average 1.0946502057613168) internal successors, (266), 253 states have internal predecessors, (266), 98 states have call successors, (98), 56 states have call predecessors, (98), 55 states have return successors, (97), 87 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-06 15:14:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 461 transitions. [2022-04-06 15:14:46,945 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 461 transitions. Word has length 104 [2022-04-06 15:14:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:14:46,945 INFO L478 AbstractCegarLoop]: Abstraction has 397 states and 461 transitions. [2022-04-06 15:14:46,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 15:14:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 461 transitions. [2022-04-06 15:14:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 15:14:46,946 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:14:46,946 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:14:46,963 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 15:14:47,162 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 15:14:47,163 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:14:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:14:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1582034255, now seen corresponding path program 41 times [2022-04-06 15:14:47,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:47,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534746028] [2022-04-06 15:14:47,163 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:14:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1582034255, now seen corresponding path program 42 times [2022-04-06 15:14:47,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:14:47,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224579084] [2022-04-06 15:14:47,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:14:47,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:14:47,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:14:47,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472648222] [2022-04-06 15:14:47,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:14:47,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:14:47,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:14:47,169 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 15:14:47,170 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 15:14:47,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:14:47,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:14:47,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 15:14:47,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:14:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 95 proven. 51 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2022-04-06 15:14:47,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:14:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-04-06 15:14:47,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:14:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224579084] [2022-04-06 15:14:47,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:14:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472648222] [2022-04-06 15:14:47,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472648222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:14:47,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:14:47,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-06 15:14:47,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:14:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534746028] [2022-04-06 15:14:47,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534746028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:14:47,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:14:47,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:14:47,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295521282] [2022-04-06 15:14:47,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:14:47,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:14:47,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:47,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:14:47,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:14:47,727 INFO L87 Difference]: Start difference. First operand 397 states and 461 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 15:14:48,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:14:48,222 INFO L93 Difference]: Finished difference Result 445 states and 533 transitions. [2022-04-06 15:14:48,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:14:48,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 104 [2022-04-06 15:14:48,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:14:48,223 INFO L225 Difference]: With dead ends: 445 [2022-04-06 15:14:48,223 INFO L226 Difference]: Without dead ends: 443 [2022-04-06 15:14:48,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:14:48,224 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:14:48,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 205 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 319 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-04-06 15:14:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-04-06 15:14:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-04-06 15:14:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 266 states have (on average 1.105263157894737) internal successors, (294), 278 states have internal predecessors, (294), 119 states have call successors, (119), 58 states have call predecessors, (119), 57 states have return successors, (118), 106 states have call predecessors, (118), 118 states have call successors, (118) [2022-04-06 15:14:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 531 transitions. [2022-04-06 15:14:48,373 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 531 transitions. Word has length 104 [2022-04-06 15:14:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:14:48,373 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 531 transitions. [2022-04-06 15:14:48,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 15:14:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 531 transitions. [2022-04-06 15:14:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 15:14:48,374 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:14:48,374 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:14:48,390 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 15:14:48,583 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 15:14:48,583 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:14:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:14:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash -567590240, now seen corresponding path program 11 times [2022-04-06 15:14:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:48,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1794542088] [2022-04-06 15:14:48,584 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:14:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash -567590240, now seen corresponding path program 12 times [2022-04-06 15:14:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:14:48,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949585258] [2022-04-06 15:14:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:14:48,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:14:48,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:14:48,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629438468] [2022-04-06 15:14:48,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:14:48,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:14:48,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:14:48,589 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:14:48,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 15:14:48,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 15:14:48,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:14:48,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 15:14:48,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:14:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 123 proven. 20 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-04-06 15:14:48,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:14:49,108 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:16:10,530 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~r~0_BEFORE_CALL_443 Int) (v_main_~q~0_BEFORE_CALL_415 Int) (v_main_~s~0_BEFORE_CALL_397 Int) (v_main_~p~0_BEFORE_CALL_434 Int)) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_443 v_main_~q~0_BEFORE_CALL_415) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_397) 0)))) (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_397) v_main_~r~0_BEFORE_CALL_443) v_main_~q~0_BEFORE_CALL_415) 1) (* v_main_~s~0_BEFORE_CALL_397 (+ v_main_~p~0_BEFORE_CALL_434 (* (- 1) v_main_~q~0_BEFORE_CALL_415))))))) is different from true [2022-04-06 15:17:14,329 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~r~0_BEFORE_CALL_443 Int) (v_main_~q~0_BEFORE_CALL_415 Int) (v_main_~s~0_BEFORE_CALL_397 Int) (v_main_~p~0_BEFORE_CALL_434 Int)) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_443 v_main_~q~0_BEFORE_CALL_415) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= .cse0 0) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_397) 0)))) (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_397) v_main_~r~0_BEFORE_CALL_443) v_main_~q~0_BEFORE_CALL_415) 1) (* v_main_~s~0_BEFORE_CALL_397 (+ v_main_~p~0_BEFORE_CALL_434 (* (- 1) v_main_~q~0_BEFORE_CALL_415))))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-04-06 15:17:32,375 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_443 Int) (v_main_~q~0_BEFORE_CALL_415 Int) (v_main_~s~0_BEFORE_CALL_397 Int) (v_main_~p~0_BEFORE_CALL_434 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_443 v_main_~q~0_BEFORE_CALL_415) 1))) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_397) v_main_~r~0_BEFORE_CALL_443) v_main_~q~0_BEFORE_CALL_415) 1) (* v_main_~s~0_BEFORE_CALL_397 (+ v_main_~p~0_BEFORE_CALL_434 (* (- 1) v_main_~q~0_BEFORE_CALL_415))))) (= .cse0 0) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_397) 0))))) is different from true [2022-04-06 15:17:41,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:17:41,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949585258] [2022-04-06 15:17:41,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:17:41,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629438468] [2022-04-06 15:17:41,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629438468] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:17:41,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:17:41,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 15:17:41,616 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:17:41,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1794542088] [2022-04-06 15:17:41,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1794542088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:17:41,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:17:41,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 15:17:41,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394970880] [2022-04-06 15:17:41,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:17:41,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 15:17:41,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:17:41,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 15:17:41,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=193, Unknown=6, NotChecked=90, Total=342 [2022-04-06 15:17:41,617 INFO L87 Difference]: Start difference. First operand 443 states and 531 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 15:17:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:17:42,374 INFO L93 Difference]: Finished difference Result 477 states and 568 transitions. [2022-04-06 15:17:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:17:42,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 117 [2022-04-06 15:17:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:17:42,376 INFO L225 Difference]: With dead ends: 477 [2022-04-06 15:17:42,376 INFO L226 Difference]: Without dead ends: 475 [2022-04-06 15:17:42,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=77, Invalid=271, Unknown=6, NotChecked=108, Total=462 [2022-04-06 15:17:42,376 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:17:42,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 109 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:17:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-04-06 15:17:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2022-04-06 15:17:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 287 states have (on average 1.1045296167247387) internal successors, (317), 299 states have internal predecessors, (317), 125 states have call successors, (125), 63 states have call predecessors, (125), 62 states have return successors, (124), 112 states have call predecessors, (124), 124 states have call successors, (124) [2022-04-06 15:17:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 566 transitions. [2022-04-06 15:17:42,544 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 566 transitions. Word has length 117 [2022-04-06 15:17:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:17:42,544 INFO L478 AbstractCegarLoop]: Abstraction has 475 states and 566 transitions. [2022-04-06 15:17:42,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 15:17:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 566 transitions. [2022-04-06 15:17:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 15:17:42,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:17:42,545 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:17:42,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 15:17:42,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 15:17:42,749 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:17:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:17:42,750 INFO L85 PathProgramCache]: Analyzing trace with hash 818613154, now seen corresponding path program 43 times [2022-04-06 15:17:42,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:17:42,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [836264167] [2022-04-06 15:17:42,750 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:17:42,750 INFO L85 PathProgramCache]: Analyzing trace with hash 818613154, now seen corresponding path program 44 times [2022-04-06 15:17:42,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:17:42,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063960320] [2022-04-06 15:17:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:17:42,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:17:42,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:17:42,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892290291] [2022-04-06 15:17:42,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:17:42,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:17:42,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:17:42,756 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:17:42,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 15:17:42,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:17:42,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:17:42,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 15:17:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:17:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 105 proven. 167 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-04-06 15:17:43,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:17:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 141 proven. 20 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2022-04-06 15:17:43,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:17:43,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063960320] [2022-04-06 15:17:43,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:17:43,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892290291] [2022-04-06 15:17:43,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892290291] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:17:43,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:17:43,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 15:17:43,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:17:43,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [836264167] [2022-04-06 15:17:43,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [836264167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:17:43,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:17:43,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:17:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40703531] [2022-04-06 15:17:43,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:17:43,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:17:43,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:17:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:17:43,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:17:43,759 INFO L87 Difference]: Start difference. First operand 475 states and 566 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 15:17:44,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:17:44,395 INFO L93 Difference]: Finished difference Result 510 states and 605 transitions. [2022-04-06 15:17:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:17:44,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 117 [2022-04-06 15:17:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:17:44,399 INFO L225 Difference]: With dead ends: 510 [2022-04-06 15:17:44,399 INFO L226 Difference]: Without dead ends: 508 [2022-04-06 15:17:44,399 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 213 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-04-06 15:17:44,401 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 13 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:17:44,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 227 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 15:17:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-04-06 15:17:44,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 478. [2022-04-06 15:17:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 290 states have (on average 1.1) internal successors, (319), 302 states have internal predecessors, (319), 123 states have call successors, (123), 65 states have call predecessors, (123), 64 states have return successors, (122), 110 states have call predecessors, (122), 122 states have call successors, (122) [2022-04-06 15:17:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 564 transitions. [2022-04-06 15:17:44,577 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 564 transitions. Word has length 117 [2022-04-06 15:17:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:17:44,577 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 564 transitions. [2022-04-06 15:17:44,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 15:17:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 564 transitions. [2022-04-06 15:17:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 15:17:44,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:17:44,578 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:17:44,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 15:17:44,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 15:17:44,791 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:17:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:17:44,792 INFO L85 PathProgramCache]: Analyzing trace with hash -920678622, now seen corresponding path program 45 times [2022-04-06 15:17:44,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:17:44,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966933467] [2022-04-06 15:17:44,792 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:17:44,792 INFO L85 PathProgramCache]: Analyzing trace with hash -920678622, now seen corresponding path program 46 times [2022-04-06 15:17:44,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:17:44,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675328836] [2022-04-06 15:17:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:17:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:17:44,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:17:44,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063932221] [2022-04-06 15:17:44,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:17:44,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:17:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:17:44,798 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:17:44,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 15:17:44,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:17:44,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:17:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 15:17:44,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:17:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 131 proven. 156 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-04-06 15:17:45,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:17:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-04-06 15:17:46,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:17:46,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675328836] [2022-04-06 15:17:46,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:17:46,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063932221] [2022-04-06 15:17:46,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063932221] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:17:46,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:17:46,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-04-06 15:17:46,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:17:46,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966933467] [2022-04-06 15:17:46,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966933467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:17:46,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:17:46,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:17:46,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555005467] [2022-04-06 15:17:46,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:17:46,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:17:46,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:17:46,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:17:46,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-04-06 15:17:46,229 INFO L87 Difference]: Start difference. First operand 478 states and 564 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 15:17:47,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:17:47,748 INFO L93 Difference]: Finished difference Result 516 states and 608 transitions. [2022-04-06 15:17:47,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 15:17:47,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 117 [2022-04-06 15:17:47,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:17:47,750 INFO L225 Difference]: With dead ends: 516 [2022-04-06 15:17:47,750 INFO L226 Difference]: Without dead ends: 514 [2022-04-06 15:17:47,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 213 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:17:47,751 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:17:47,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 230 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 15:17:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-04-06 15:17:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 496. [2022-04-06 15:17:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 302 states have (on average 1.099337748344371) internal successors, (332), 314 states have internal predecessors, (332), 126 states have call successors, (126), 68 states have call predecessors, (126), 67 states have return successors, (125), 113 states have call predecessors, (125), 125 states have call successors, (125) [2022-04-06 15:17:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 583 transitions. [2022-04-06 15:17:47,936 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 583 transitions. Word has length 117 [2022-04-06 15:17:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:17:47,936 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 583 transitions. [2022-04-06 15:17:47,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 15:17:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 583 transitions. [2022-04-06 15:17:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 15:17:47,938 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:17:47,938 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:17:47,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 15:17:48,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:17:48,151 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:17:48,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:17:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash 465524772, now seen corresponding path program 47 times [2022-04-06 15:17:48,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:17:48,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335245403] [2022-04-06 15:17:48,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:17:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash 465524772, now seen corresponding path program 48 times [2022-04-06 15:17:48,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:17:48,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340205237] [2022-04-06 15:17:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:17:48,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:17:48,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:17:48,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366526486] [2022-04-06 15:17:48,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:17:48,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:17:48,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:17:48,158 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:17:48,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 15:17:48,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 15:17:48,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:17:48,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 15:17:48,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:17:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 144 proven. 17 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2022-04-06 15:17:48,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:17:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 145 proven. 16 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2022-04-06 15:17:48,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:17:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340205237] [2022-04-06 15:17:48,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:17:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366526486] [2022-04-06 15:17:48,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366526486] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:17:48,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:17:48,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-06 15:17:48,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:17:48,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335245403] [2022-04-06 15:17:48,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335245403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:17:48,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:17:48,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 15:17:48,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900360645] [2022-04-06 15:17:48,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:17:48,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 15:17:48,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:17:48,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 15:17:48,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 15:17:48,697 INFO L87 Difference]: Start difference. First operand 496 states and 583 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 15:17:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:17:49,106 INFO L93 Difference]: Finished difference Result 496 states and 583 transitions. [2022-04-06 15:17:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 15:17:49,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) Word has length 117 [2022-04-06 15:17:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:17:49,108 INFO L225 Difference]: With dead ends: 496 [2022-04-06 15:17:49,108 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 15:17:49,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:17:49,109 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:17:49,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 120 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-04-06 15:17:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 15:17:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 15:17:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 15:17:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 15:17:49,109 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 117 [2022-04-06 15:17:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:17:49,110 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 15:17:49,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 15:17:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 15:17:49,110 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 15:17:49,111 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 15:17:49,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 15:17:49,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 15:17:49,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 15:18:34,541 WARN L232 SmtUtils]: Spent 38.76s on a formula simplification. DAG size of input: 385 DAG size of output: 381 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 15:20:26,169 WARN L232 SmtUtils]: Spent 1.86m on a formula simplification that was a NOOP. DAG size: 387 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 15:21:15,509 WARN L232 SmtUtils]: Spent 49.34s on a formula simplification. DAG size of input: 406 DAG size of output: 403 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 15:21:28,037 WARN L232 SmtUtils]: Spent 12.51s on a formula simplification. DAG size of input: 681 DAG size of output: 663 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 15:21:37,454 WARN L232 SmtUtils]: Spent 9.27s on a formula simplification. DAG size of input: 689 DAG size of output: 660 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 15:22:16,068 WARN L232 SmtUtils]: Spent 38.59s on a formula simplification. DAG size of input: 383 DAG size of output: 379 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 15:22:43,059 WARN L232 SmtUtils]: Spent 22.04s on a formula simplification. DAG size of input: 686 DAG size of output: 661 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 15:23:34,626 WARN L232 SmtUtils]: Spent 50.76s on a formula simplification. DAG size of input: 541 DAG size of output: 25 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 15:24:22,911 WARN L232 SmtUtils]: Spent 47.82s on a formula simplification. DAG size of input: 541 DAG size of output: 25 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)