/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/locks/test_locks_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:17:02,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:17:02,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:17:02,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 17:17:02,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 17:17:02,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 17:17:02,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 17:17:02,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 17:17:02,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 17:17:02,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 17:17:02,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 17:17:02,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 17:17:02,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 17:17:02,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 17:17:02,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 17:17:02,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 17:17:02,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 17:17:02,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 17:17:02,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 17:17:02,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 17:17:02,487 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 17:17:02,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 17:17:02,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 17:17:02,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 17:17:02,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 17:17:02,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 17:17:02,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 17:17:02,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 17:17:02,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 17:17:02,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 17:17:02,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 17:17:02,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 17:17:02,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 17:17:02,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 17:17:02,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 17:17:02,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 17:17:02,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 17:17:02,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 17:17:02,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 17:17:02,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:17:02,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:17:02,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:17:02,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 17:17:02,510 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:17:02,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:17:02,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:17:02,512 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 17:17:02,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:17:02,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 17:17:02,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:17:02,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:17:02,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:17:02,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:17:02,513 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 17:17:02,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:17:02,514 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:17:02,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:17:02,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:17:02,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:17:02,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:17:02,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:17:02,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:17:02,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:17:02,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:17:02,514 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:17:02,515 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:17:02,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:17:02,515 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 17:17:02,515 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:17:02,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:17:02,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:17:02,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:17:02,754 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:17:02,754 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:17:02,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-2.c [2022-03-20 17:17:02,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a100b8135/1f9d71435bb348fda8f9e7efaccb83ca/FLAG4c85ecf97 [2022-03-20 17:17:03,163 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:17:03,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c [2022-03-20 17:17:03,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a100b8135/1f9d71435bb348fda8f9e7efaccb83ca/FLAG4c85ecf97 [2022-03-20 17:17:03,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a100b8135/1f9d71435bb348fda8f9e7efaccb83ca [2022-03-20 17:17:03,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:17:03,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:17:03,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:17:03,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:17:03,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:17:03,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:17:03" (1/1) ... [2022-03-20 17:17:03,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b5aa92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03, skipping insertion in model container [2022-03-20 17:17:03,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:17:03" (1/1) ... [2022-03-20 17:17:03,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:17:03,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:17:03,788 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c[5628,5641] [2022-03-20 17:17:03,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:17:03,802 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:17:03,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c[5628,5641] [2022-03-20 17:17:03,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:17:03,848 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:17:03,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03 WrapperNode [2022-03-20 17:17:03,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:17:03,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:17:03,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:17:03,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:17:03,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03" (1/1) ... [2022-03-20 17:17:03,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03" (1/1) ... [2022-03-20 17:17:03,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03" (1/1) ... [2022-03-20 17:17:03,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03" (1/1) ... [2022-03-20 17:17:03,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03" (1/1) ... [2022-03-20 17:17:03,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03" (1/1) ... [2022-03-20 17:17:03,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03" (1/1) ... [2022-03-20 17:17:03,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:17:03,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:17:03,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:17:03,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:17:03,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03" (1/1) ... [2022-03-20 17:17:03,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:17:03,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:17:03,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:17:03,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:17:03,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:17:03,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:17:03,945 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:17:03,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:17:03,945 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:17:03,945 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:17:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:17:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:17:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 17:17:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:17:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:17:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:17:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:17:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:17:03,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:17:03,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:17:04,016 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:17:04,017 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:17:04,179 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:17:04,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:17:04,184 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 17:17:04,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:17:04 BoogieIcfgContainer [2022-03-20 17:17:04,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:17:04,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:17:04,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:17:04,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:17:04,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:17:03" (1/3) ... [2022-03-20 17:17:04,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1224f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:17:04, skipping insertion in model container [2022-03-20 17:17:04,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:17:03" (2/3) ... [2022-03-20 17:17:04,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1224f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:17:04, skipping insertion in model container [2022-03-20 17:17:04,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:17:04" (3/3) ... [2022-03-20 17:17:04,198 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2022-03-20 17:17:04,202 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:17:04,202 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:17:04,232 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:17:04,236 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:17:04,237 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:17:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 55 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:17:04,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 17:17:04,250 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:04,250 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:04,251 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash 208658311, now seen corresponding path program 1 times [2022-03-20 17:17:04,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:04,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [315806846] [2022-03-20 17:17:04,266 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:04,266 INFO L85 PathProgramCache]: Analyzing trace with hash 208658311, now seen corresponding path program 2 times [2022-03-20 17:17:04,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:04,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775695556] [2022-03-20 17:17:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:04,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:04,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:04,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:04,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775695556] [2022-03-20 17:17:04,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775695556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:04,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:04,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:04,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:04,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [315806846] [2022-03-20 17:17:04,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [315806846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:04,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:04,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:04,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110386127] [2022-03-20 17:17:04,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:04,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:04,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:04,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:04,527 INFO L87 Difference]: Start difference. First operand has 60 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 55 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:04,759 INFO L93 Difference]: Finished difference Result 118 states and 211 transitions. [2022-03-20 17:17:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:04,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 17:17:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:04,776 INFO L225 Difference]: With dead ends: 118 [2022-03-20 17:17:04,776 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 17:17:04,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:04,781 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 259 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:04,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 119 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:04,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 17:17:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2022-03-20 17:17:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 67 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 130 transitions. [2022-03-20 17:17:04,822 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 130 transitions. Word has length 26 [2022-03-20 17:17:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:04,822 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 130 transitions. [2022-03-20 17:17:04,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 130 transitions. [2022-03-20 17:17:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 17:17:04,824 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:04,824 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:04,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:17:04,825 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1785486395, now seen corresponding path program 1 times [2022-03-20 17:17:04,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:04,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1543102113] [2022-03-20 17:17:04,827 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:04,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1785486395, now seen corresponding path program 2 times [2022-03-20 17:17:04,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:04,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21185225] [2022-03-20 17:17:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:04,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:04,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:04,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:04,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21185225] [2022-03-20 17:17:04,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21185225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:04,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:04,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:04,924 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:04,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1543102113] [2022-03-20 17:17:04,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1543102113] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:04,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:04,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838134482] [2022-03-20 17:17:04,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:04,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:04,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:04,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:04,926 INFO L87 Difference]: Start difference. First operand 71 states and 130 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:05,060 INFO L93 Difference]: Finished difference Result 168 states and 313 transitions. [2022-03-20 17:17:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:05,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 17:17:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:05,062 INFO L225 Difference]: With dead ends: 168 [2022-03-20 17:17:05,062 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 17:17:05,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:05,063 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 223 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:05,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 135 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 17:17:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-03-20 17:17:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.8865979381443299) internal successors, (183), 97 states have internal predecessors, (183), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 186 transitions. [2022-03-20 17:17:05,076 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 186 transitions. Word has length 26 [2022-03-20 17:17:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:05,076 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 186 transitions. [2022-03-20 17:17:05,076 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,076 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 186 transitions. [2022-03-20 17:17:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 17:17:05,077 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:05,077 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:05,077 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:17:05,077 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2121315188, now seen corresponding path program 1 times [2022-03-20 17:17:05,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308310823] [2022-03-20 17:17:05,078 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:05,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2121315188, now seen corresponding path program 2 times [2022-03-20 17:17:05,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:05,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475182029] [2022-03-20 17:17:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:05,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:05,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:05,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475182029] [2022-03-20 17:17:05,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475182029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:05,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308310823] [2022-03-20 17:17:05,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308310823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170769731] [2022-03-20 17:17:05,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:05,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:05,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:05,116 INFO L87 Difference]: Start difference. First operand 101 states and 186 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:05,203 INFO L93 Difference]: Finished difference Result 154 states and 280 transitions. [2022-03-20 17:17:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:05,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 17:17:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:05,205 INFO L225 Difference]: With dead ends: 154 [2022-03-20 17:17:05,205 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 17:17:05,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:05,206 INFO L913 BasicCegarLoop]: 156 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:05,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 163 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 17:17:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-03-20 17:17:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.85) internal successors, (185), 100 states have internal predecessors, (185), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 188 transitions. [2022-03-20 17:17:05,228 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 188 transitions. Word has length 27 [2022-03-20 17:17:05,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:05,228 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 188 transitions. [2022-03-20 17:17:05,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 188 transitions. [2022-03-20 17:17:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 17:17:05,229 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:05,229 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:05,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 17:17:05,230 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:05,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:05,230 INFO L85 PathProgramCache]: Analyzing trace with hash 484708366, now seen corresponding path program 1 times [2022-03-20 17:17:05,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [551732333] [2022-03-20 17:17:05,231 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:05,231 INFO L85 PathProgramCache]: Analyzing trace with hash 484708366, now seen corresponding path program 2 times [2022-03-20 17:17:05,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:05,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135806901] [2022-03-20 17:17:05,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:05,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:05,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:05,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135806901] [2022-03-20 17:17:05,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135806901] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:05,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [551732333] [2022-03-20 17:17:05,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [551732333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000529560] [2022-03-20 17:17:05,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:05,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:05,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:05,305 INFO L87 Difference]: Start difference. First operand 104 states and 188 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:05,459 INFO L93 Difference]: Finished difference Result 292 states and 540 transitions. [2022-03-20 17:17:05,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:05,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 17:17:05,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:05,461 INFO L225 Difference]: With dead ends: 292 [2022-03-20 17:17:05,461 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 17:17:05,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:05,463 INFO L913 BasicCegarLoop]: 102 mSDtfsCounter, 248 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:05,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 109 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:05,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 17:17:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-03-20 17:17:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.8534031413612566) internal successors, (354), 191 states have internal predecessors, (354), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 357 transitions. [2022-03-20 17:17:05,480 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 357 transitions. Word has length 27 [2022-03-20 17:17:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:05,480 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 357 transitions. [2022-03-20 17:17:05,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 357 transitions. [2022-03-20 17:17:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 17:17:05,481 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:05,481 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:05,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 17:17:05,481 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1816114224, now seen corresponding path program 1 times [2022-03-20 17:17:05,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [810028055] [2022-03-20 17:17:05,482 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:05,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1816114224, now seen corresponding path program 2 times [2022-03-20 17:17:05,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:05,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112149522] [2022-03-20 17:17:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:05,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:05,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:05,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112149522] [2022-03-20 17:17:05,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112149522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:05,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [810028055] [2022-03-20 17:17:05,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [810028055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12493979] [2022-03-20 17:17:05,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:05,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:05,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:05,516 INFO L87 Difference]: Start difference. First operand 195 states and 357 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:05,607 INFO L93 Difference]: Finished difference Result 255 states and 467 transitions. [2022-03-20 17:17:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:05,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 17:17:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:05,610 INFO L225 Difference]: With dead ends: 255 [2022-03-20 17:17:05,610 INFO L226 Difference]: Without dead ends: 253 [2022-03-20 17:17:05,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:05,613 INFO L913 BasicCegarLoop]: 181 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:05,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 188 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-20 17:17:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 195. [2022-03-20 17:17:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.8429319371727748) internal successors, (352), 191 states have internal predecessors, (352), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 355 transitions. [2022-03-20 17:17:05,646 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 355 transitions. Word has length 27 [2022-03-20 17:17:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:05,647 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 355 transitions. [2022-03-20 17:17:05,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 355 transitions. [2022-03-20 17:17:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:17:05,652 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:05,652 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:05,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 17:17:05,652 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2141269562, now seen corresponding path program 1 times [2022-03-20 17:17:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1869457446] [2022-03-20 17:17:05,654 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:05,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2141269562, now seen corresponding path program 2 times [2022-03-20 17:17:05,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:05,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217117289] [2022-03-20 17:17:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:05,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:05,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:05,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217117289] [2022-03-20 17:17:05,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217117289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:05,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1869457446] [2022-03-20 17:17:05,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1869457446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375339698] [2022-03-20 17:17:05,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:05,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:05,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:05,717 INFO L87 Difference]: Start difference. First operand 195 states and 355 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:05,827 INFO L93 Difference]: Finished difference Result 371 states and 683 transitions. [2022-03-20 17:17:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:05,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 17:17:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:05,829 INFO L225 Difference]: With dead ends: 371 [2022-03-20 17:17:05,829 INFO L226 Difference]: Without dead ends: 369 [2022-03-20 17:17:05,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:05,831 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 239 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:05,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 106 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-20 17:17:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 263. [2022-03-20 17:17:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.83011583011583) internal successors, (474), 259 states have internal predecessors, (474), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 477 transitions. [2022-03-20 17:17:05,848 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 477 transitions. Word has length 28 [2022-03-20 17:17:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:05,849 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 477 transitions. [2022-03-20 17:17:05,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 477 transitions. [2022-03-20 17:17:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:17:05,853 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:05,853 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:05,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 17:17:05,853 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash 147124856, now seen corresponding path program 1 times [2022-03-20 17:17:05,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2085649491] [2022-03-20 17:17:05,854 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:05,855 INFO L85 PathProgramCache]: Analyzing trace with hash 147124856, now seen corresponding path program 2 times [2022-03-20 17:17:05,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:05,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811625447] [2022-03-20 17:17:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:05,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:05,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:05,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811625447] [2022-03-20 17:17:05,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811625447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:05,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2085649491] [2022-03-20 17:17:05,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2085649491] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796589999] [2022-03-20 17:17:05,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:05,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:05,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:05,908 INFO L87 Difference]: Start difference. First operand 263 states and 477 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:06,007 INFO L93 Difference]: Finished difference Result 631 states and 1155 transitions. [2022-03-20 17:17:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:06,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 17:17:06,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:06,010 INFO L225 Difference]: With dead ends: 631 [2022-03-20 17:17:06,010 INFO L226 Difference]: Without dead ends: 377 [2022-03-20 17:17:06,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:06,012 INFO L913 BasicCegarLoop]: 132 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:06,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 139 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:06,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-20 17:17:06,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2022-03-20 17:17:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 371 states have (on average 1.8221024258760108) internal successors, (676), 371 states have internal predecessors, (676), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 679 transitions. [2022-03-20 17:17:06,034 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 679 transitions. Word has length 28 [2022-03-20 17:17:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:06,034 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 679 transitions. [2022-03-20 17:17:06,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 679 transitions. [2022-03-20 17:17:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:17:06,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:06,035 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:06,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 17:17:06,035 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:06,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1955059427, now seen corresponding path program 1 times [2022-03-20 17:17:06,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624621837] [2022-03-20 17:17:06,036 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:06,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1955059427, now seen corresponding path program 2 times [2022-03-20 17:17:06,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:06,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29472403] [2022-03-20 17:17:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:06,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:06,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:06,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29472403] [2022-03-20 17:17:06,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29472403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:06,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:06,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:06,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:06,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624621837] [2022-03-20 17:17:06,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624621837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:06,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:06,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:06,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616908088] [2022-03-20 17:17:06,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:06,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:06,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:06,063 INFO L87 Difference]: Start difference. First operand 375 states and 679 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:06,178 INFO L93 Difference]: Finished difference Result 565 states and 1021 transitions. [2022-03-20 17:17:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:06,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 17:17:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:06,181 INFO L225 Difference]: With dead ends: 565 [2022-03-20 17:17:06,181 INFO L226 Difference]: Without dead ends: 383 [2022-03-20 17:17:06,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:06,182 INFO L913 BasicCegarLoop]: 150 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:06,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 157 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-03-20 17:17:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 381. [2022-03-20 17:17:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 377 states have (on average 1.8037135278514589) internal successors, (680), 377 states have internal predecessors, (680), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 683 transitions. [2022-03-20 17:17:06,204 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 683 transitions. Word has length 29 [2022-03-20 17:17:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:06,204 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 683 transitions. [2022-03-20 17:17:06,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 683 transitions. [2022-03-20 17:17:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:17:06,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:06,205 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:06,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 17:17:06,205 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash 266115685, now seen corresponding path program 1 times [2022-03-20 17:17:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1767298173] [2022-03-20 17:17:06,206 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash 266115685, now seen corresponding path program 2 times [2022-03-20 17:17:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:06,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666898498] [2022-03-20 17:17:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:06,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:06,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:06,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:06,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666898498] [2022-03-20 17:17:06,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666898498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:06,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:06,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:06,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:06,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1767298173] [2022-03-20 17:17:06,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1767298173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:06,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:06,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:06,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036655251] [2022-03-20 17:17:06,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:06,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:06,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:06,233 INFO L87 Difference]: Start difference. First operand 381 states and 683 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:06,337 INFO L93 Difference]: Finished difference Result 717 states and 1301 transitions. [2022-03-20 17:17:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:06,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 17:17:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:06,340 INFO L225 Difference]: With dead ends: 717 [2022-03-20 17:17:06,340 INFO L226 Difference]: Without dead ends: 715 [2022-03-20 17:17:06,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:06,340 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 232 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:06,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 105 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-20 17:17:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 521. [2022-03-20 17:17:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 517 states have (on average 1.7794970986460348) internal successors, (920), 517 states have internal predecessors, (920), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 923 transitions. [2022-03-20 17:17:06,367 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 923 transitions. Word has length 29 [2022-03-20 17:17:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:06,368 INFO L478 AbstractCegarLoop]: Abstraction has 521 states and 923 transitions. [2022-03-20 17:17:06,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 923 transitions. [2022-03-20 17:17:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:17:06,368 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:06,369 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:06,369 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 17:17:06,369 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:06,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1728029021, now seen corresponding path program 1 times [2022-03-20 17:17:06,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [214140309] [2022-03-20 17:17:06,370 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:06,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1728029021, now seen corresponding path program 2 times [2022-03-20 17:17:06,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:06,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442219724] [2022-03-20 17:17:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:06,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:06,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:06,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:06,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442219724] [2022-03-20 17:17:06,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442219724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:06,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:06,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:06,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:06,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [214140309] [2022-03-20 17:17:06,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [214140309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:06,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:06,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:06,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65885875] [2022-03-20 17:17:06,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:06,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:06,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:06,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:06,394 INFO L87 Difference]: Start difference. First operand 521 states and 923 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:06,505 INFO L93 Difference]: Finished difference Result 1245 states and 2221 transitions. [2022-03-20 17:17:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:06,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 17:17:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:06,508 INFO L225 Difference]: With dead ends: 1245 [2022-03-20 17:17:06,508 INFO L226 Difference]: Without dead ends: 739 [2022-03-20 17:17:06,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:06,509 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 205 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:06,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 141 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-03-20 17:17:06,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2022-03-20 17:17:06,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 733 states have (on average 1.7735334242837653) internal successors, (1300), 733 states have internal predecessors, (1300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1303 transitions. [2022-03-20 17:17:06,561 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1303 transitions. Word has length 29 [2022-03-20 17:17:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:06,562 INFO L478 AbstractCegarLoop]: Abstraction has 737 states and 1303 transitions. [2022-03-20 17:17:06,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1303 transitions. [2022-03-20 17:17:06,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 17:17:06,563 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:06,563 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:06,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 17:17:06,563 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash -340135571, now seen corresponding path program 1 times [2022-03-20 17:17:06,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1833372498] [2022-03-20 17:17:06,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:06,564 INFO L85 PathProgramCache]: Analyzing trace with hash -340135571, now seen corresponding path program 2 times [2022-03-20 17:17:06,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:06,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090314954] [2022-03-20 17:17:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:06,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:06,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:06,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:06,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090314954] [2022-03-20 17:17:06,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090314954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:06,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:06,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:06,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:06,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1833372498] [2022-03-20 17:17:06,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1833372498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:06,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:06,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:06,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901029104] [2022-03-20 17:17:06,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:06,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:06,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:06,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:06,588 INFO L87 Difference]: Start difference. First operand 737 states and 1303 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:06,698 INFO L93 Difference]: Finished difference Result 1105 states and 1949 transitions. [2022-03-20 17:17:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:06,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 17:17:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:06,701 INFO L225 Difference]: With dead ends: 1105 [2022-03-20 17:17:06,701 INFO L226 Difference]: Without dead ends: 747 [2022-03-20 17:17:06,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:06,703 INFO L913 BasicCegarLoop]: 147 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:06,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 154 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-20 17:17:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 745. [2022-03-20 17:17:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 741 states have (on average 1.7543859649122806) internal successors, (1300), 741 states have internal predecessors, (1300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1303 transitions. [2022-03-20 17:17:06,744 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1303 transitions. Word has length 30 [2022-03-20 17:17:06,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:06,744 INFO L478 AbstractCegarLoop]: Abstraction has 745 states and 1303 transitions. [2022-03-20 17:17:06,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1303 transitions. [2022-03-20 17:17:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 17:17:06,745 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:06,745 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:06,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 17:17:06,746 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:06,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:06,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2029079313, now seen corresponding path program 1 times [2022-03-20 17:17:06,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1681676763] [2022-03-20 17:17:06,746 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:06,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2029079313, now seen corresponding path program 2 times [2022-03-20 17:17:06,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:06,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487131414] [2022-03-20 17:17:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:06,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:06,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:06,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:06,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487131414] [2022-03-20 17:17:06,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487131414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:06,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:06,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:06,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:06,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1681676763] [2022-03-20 17:17:06,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1681676763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:06,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:06,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:06,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599354538] [2022-03-20 17:17:06,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:06,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:06,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:06,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:06,770 INFO L87 Difference]: Start difference. First operand 745 states and 1303 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:06,919 INFO L93 Difference]: Finished difference Result 1389 states and 2465 transitions. [2022-03-20 17:17:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 17:17:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:06,924 INFO L225 Difference]: With dead ends: 1389 [2022-03-20 17:17:06,925 INFO L226 Difference]: Without dead ends: 1387 [2022-03-20 17:17:06,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:06,925 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 225 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:06,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 104 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:06,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-03-20 17:17:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1033. [2022-03-20 17:17:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1029 states have (on average 1.7220602526724975) internal successors, (1772), 1029 states have internal predecessors, (1772), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1775 transitions. [2022-03-20 17:17:06,980 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1775 transitions. Word has length 30 [2022-03-20 17:17:06,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:06,980 INFO L478 AbstractCegarLoop]: Abstraction has 1033 states and 1775 transitions. [2022-03-20 17:17:06,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1775 transitions. [2022-03-20 17:17:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 17:17:06,981 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:06,981 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:06,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 17:17:06,982 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash 271743277, now seen corresponding path program 1 times [2022-03-20 17:17:06,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:06,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1078465123] [2022-03-20 17:17:06,982 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash 271743277, now seen corresponding path program 2 times [2022-03-20 17:17:06,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:06,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366573225] [2022-03-20 17:17:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:07,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:07,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:07,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366573225] [2022-03-20 17:17:07,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366573225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:07,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:07,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:07,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:07,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1078465123] [2022-03-20 17:17:07,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1078465123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:07,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:07,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:07,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755104619] [2022-03-20 17:17:07,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:07,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:07,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:07,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:07,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:07,005 INFO L87 Difference]: Start difference. First operand 1033 states and 1775 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:07,181 INFO L93 Difference]: Finished difference Result 2461 states and 4257 transitions. [2022-03-20 17:17:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 17:17:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:07,186 INFO L225 Difference]: With dead ends: 2461 [2022-03-20 17:17:07,186 INFO L226 Difference]: Without dead ends: 1451 [2022-03-20 17:17:07,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:07,188 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 199 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:07,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 143 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-03-20 17:17:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1449. [2022-03-20 17:17:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1445 states have (on average 1.719031141868512) internal successors, (2484), 1445 states have internal predecessors, (2484), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2487 transitions. [2022-03-20 17:17:07,279 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2487 transitions. Word has length 30 [2022-03-20 17:17:07,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:07,279 INFO L478 AbstractCegarLoop]: Abstraction has 1449 states and 2487 transitions. [2022-03-20 17:17:07,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:07,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2487 transitions. [2022-03-20 17:17:07,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:17:07,280 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:07,280 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:07,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 17:17:07,281 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:07,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1523263864, now seen corresponding path program 1 times [2022-03-20 17:17:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:07,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [535417192] [2022-03-20 17:17:07,281 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1523263864, now seen corresponding path program 2 times [2022-03-20 17:17:07,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:07,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190622219] [2022-03-20 17:17:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:07,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:07,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:07,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190622219] [2022-03-20 17:17:07,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190622219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:07,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:07,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:07,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [535417192] [2022-03-20 17:17:07,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [535417192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:07,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:07,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:07,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732931756] [2022-03-20 17:17:07,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:07,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:07,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:07,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:07,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:07,304 INFO L87 Difference]: Start difference. First operand 1449 states and 2487 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:07,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:07,469 INFO L93 Difference]: Finished difference Result 2173 states and 3721 transitions. [2022-03-20 17:17:07,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:07,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 17:17:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:07,473 INFO L225 Difference]: With dead ends: 2173 [2022-03-20 17:17:07,473 INFO L226 Difference]: Without dead ends: 1467 [2022-03-20 17:17:07,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:07,475 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 192 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:07,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 151 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-03-20 17:17:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1465. [2022-03-20 17:17:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1461 states have (on average 1.700205338809035) internal successors, (2484), 1461 states have internal predecessors, (2484), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2487 transitions. [2022-03-20 17:17:07,560 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2487 transitions. Word has length 31 [2022-03-20 17:17:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:07,561 INFO L478 AbstractCegarLoop]: Abstraction has 1465 states and 2487 transitions. [2022-03-20 17:17:07,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2487 transitions. [2022-03-20 17:17:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:17:07,562 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:07,562 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:07,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 17:17:07,562 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:07,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:07,562 INFO L85 PathProgramCache]: Analyzing trace with hash -165679878, now seen corresponding path program 1 times [2022-03-20 17:17:07,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:07,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [388502131] [2022-03-20 17:17:07,563 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash -165679878, now seen corresponding path program 2 times [2022-03-20 17:17:07,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:07,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937167372] [2022-03-20 17:17:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:07,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:07,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:07,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:07,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937167372] [2022-03-20 17:17:07,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937167372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:07,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:07,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:07,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:07,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [388502131] [2022-03-20 17:17:07,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [388502131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:07,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:07,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:07,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245884519] [2022-03-20 17:17:07,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:07,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:07,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:07,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:07,588 INFO L87 Difference]: Start difference. First operand 1465 states and 2487 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:07,813 INFO L93 Difference]: Finished difference Result 2701 states and 4665 transitions. [2022-03-20 17:17:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:07,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 17:17:07,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:07,821 INFO L225 Difference]: With dead ends: 2701 [2022-03-20 17:17:07,821 INFO L226 Difference]: Without dead ends: 2699 [2022-03-20 17:17:07,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:07,822 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 218 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:07,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 103 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:07,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-03-20 17:17:07,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2057. [2022-03-20 17:17:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2053 states have (on average 1.6619581100828056) internal successors, (3412), 2053 states have internal predecessors, (3412), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 3415 transitions. [2022-03-20 17:17:07,961 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 3415 transitions. Word has length 31 [2022-03-20 17:17:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:07,961 INFO L478 AbstractCegarLoop]: Abstraction has 2057 states and 3415 transitions. [2022-03-20 17:17:07,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 3415 transitions. [2022-03-20 17:17:07,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:17:07,963 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:07,963 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:07,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 17:17:07,964 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2135142712, now seen corresponding path program 1 times [2022-03-20 17:17:07,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:07,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1331248905] [2022-03-20 17:17:07,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2135142712, now seen corresponding path program 2 times [2022-03-20 17:17:07,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:07,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966497224] [2022-03-20 17:17:07,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:07,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:07,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:07,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:07,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966497224] [2022-03-20 17:17:07,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966497224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:07,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:07,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:07,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:07,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1331248905] [2022-03-20 17:17:07,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1331248905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:07,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:07,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:07,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505843806] [2022-03-20 17:17:07,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:07,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:07,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:07,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:07,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:07,991 INFO L87 Difference]: Start difference. First operand 2057 states and 3415 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:08,283 INFO L93 Difference]: Finished difference Result 4877 states and 8153 transitions. [2022-03-20 17:17:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:08,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 17:17:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:08,292 INFO L225 Difference]: With dead ends: 4877 [2022-03-20 17:17:08,292 INFO L226 Difference]: Without dead ends: 2859 [2022-03-20 17:17:08,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:08,296 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:08,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 145 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2022-03-20 17:17:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2857. [2022-03-20 17:17:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2853 states have (on average 1.6614090431125133) internal successors, (4740), 2853 states have internal predecessors, (4740), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 4743 transitions. [2022-03-20 17:17:08,505 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 4743 transitions. Word has length 31 [2022-03-20 17:17:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:08,505 INFO L478 AbstractCegarLoop]: Abstraction has 2857 states and 4743 transitions. [2022-03-20 17:17:08,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 4743 transitions. [2022-03-20 17:17:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 17:17:08,508 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:08,508 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:08,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 17:17:08,508 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:08,508 INFO L85 PathProgramCache]: Analyzing trace with hash -840895454, now seen corresponding path program 1 times [2022-03-20 17:17:08,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:08,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323495450] [2022-03-20 17:17:08,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:08,509 INFO L85 PathProgramCache]: Analyzing trace with hash -840895454, now seen corresponding path program 2 times [2022-03-20 17:17:08,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:08,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661776745] [2022-03-20 17:17:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:08,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:08,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:08,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:08,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661776745] [2022-03-20 17:17:08,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661776745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:08,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:08,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:08,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:08,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323495450] [2022-03-20 17:17:08,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323495450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:08,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:08,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:08,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565032852] [2022-03-20 17:17:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:08,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:08,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:08,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:08,550 INFO L87 Difference]: Start difference. First operand 2857 states and 4743 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:08,789 INFO L93 Difference]: Finished difference Result 4285 states and 7097 transitions. [2022-03-20 17:17:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:08,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 17:17:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:08,797 INFO L225 Difference]: With dead ends: 4285 [2022-03-20 17:17:08,797 INFO L226 Difference]: Without dead ends: 2891 [2022-03-20 17:17:08,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:08,800 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:08,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 148 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2022-03-20 17:17:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2889. [2022-03-20 17:17:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2885 states have (on average 1.6429809358752165) internal successors, (4740), 2885 states have internal predecessors, (4740), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4743 transitions. [2022-03-20 17:17:08,999 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4743 transitions. Word has length 32 [2022-03-20 17:17:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:09,000 INFO L478 AbstractCegarLoop]: Abstraction has 2889 states and 4743 transitions. [2022-03-20 17:17:09,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4743 transitions. [2022-03-20 17:17:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 17:17:09,002 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:09,002 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:09,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 17:17:09,002 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:09,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1765128100, now seen corresponding path program 1 times [2022-03-20 17:17:09,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:09,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [207260781] [2022-03-20 17:17:09,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:09,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1765128100, now seen corresponding path program 2 times [2022-03-20 17:17:09,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:09,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275541234] [2022-03-20 17:17:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:09,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:09,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:09,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:09,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275541234] [2022-03-20 17:17:09,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275541234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:09,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:09,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:09,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:09,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [207260781] [2022-03-20 17:17:09,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [207260781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:09,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:09,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:09,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070315558] [2022-03-20 17:17:09,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:09,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:09,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:09,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:09,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:09,023 INFO L87 Difference]: Start difference. First operand 2889 states and 4743 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:09,522 INFO L93 Difference]: Finished difference Result 5261 states and 8809 transitions. [2022-03-20 17:17:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:09,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 17:17:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:09,538 INFO L225 Difference]: With dead ends: 5261 [2022-03-20 17:17:09,539 INFO L226 Difference]: Without dead ends: 5259 [2022-03-20 17:17:09,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:09,541 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:09,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 102 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-03-20 17:17:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 4105. [2022-03-20 17:17:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4101 states have (on average 1.6005852231163131) internal successors, (6564), 4101 states have internal predecessors, (6564), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 6567 transitions. [2022-03-20 17:17:09,869 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 6567 transitions. Word has length 32 [2022-03-20 17:17:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:09,869 INFO L478 AbstractCegarLoop]: Abstraction has 4105 states and 6567 transitions. [2022-03-20 17:17:09,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 6567 transitions. [2022-03-20 17:17:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 17:17:09,874 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:09,874 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:09,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 17:17:09,874 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash -229016606, now seen corresponding path program 1 times [2022-03-20 17:17:09,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:09,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [893961206] [2022-03-20 17:17:09,875 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash -229016606, now seen corresponding path program 2 times [2022-03-20 17:17:09,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:09,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818239640] [2022-03-20 17:17:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:09,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:09,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:09,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:09,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818239640] [2022-03-20 17:17:09,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818239640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:09,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:09,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:09,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [893961206] [2022-03-20 17:17:09,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [893961206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:09,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:09,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:09,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049901621] [2022-03-20 17:17:09,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:09,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:09,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:09,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:09,898 INFO L87 Difference]: Start difference. First operand 4105 states and 6567 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:10,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:10,389 INFO L93 Difference]: Finished difference Result 9677 states and 15593 transitions. [2022-03-20 17:17:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:10,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 17:17:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:10,403 INFO L225 Difference]: With dead ends: 9677 [2022-03-20 17:17:10,403 INFO L226 Difference]: Without dead ends: 5643 [2022-03-20 17:17:10,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:10,411 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:10,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 147 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2022-03-20 17:17:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5641. [2022-03-20 17:17:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.6015611140677666) internal successors, (9028), 5637 states have internal predecessors, (9028), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 9031 transitions. [2022-03-20 17:17:10,831 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 9031 transitions. Word has length 32 [2022-03-20 17:17:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:10,831 INFO L478 AbstractCegarLoop]: Abstraction has 5641 states and 9031 transitions. [2022-03-20 17:17:10,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 9031 transitions. [2022-03-20 17:17:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:17:10,836 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:10,836 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:10,836 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 17:17:10,836 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:10,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1115389939, now seen corresponding path program 1 times [2022-03-20 17:17:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:10,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1288614358] [2022-03-20 17:17:10,837 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1115389939, now seen corresponding path program 2 times [2022-03-20 17:17:10,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:10,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531703827] [2022-03-20 17:17:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:10,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:10,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:10,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531703827] [2022-03-20 17:17:10,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531703827] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:10,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:10,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:10,855 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1288614358] [2022-03-20 17:17:10,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1288614358] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:10,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:10,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024153820] [2022-03-20 17:17:10,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:10,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:10,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:10,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:10,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:10,857 INFO L87 Difference]: Start difference. First operand 5641 states and 9031 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:11,367 INFO L93 Difference]: Finished difference Result 8461 states and 13513 transitions. [2022-03-20 17:17:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 17:17:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:11,377 INFO L225 Difference]: With dead ends: 8461 [2022-03-20 17:17:11,377 INFO L226 Difference]: Without dead ends: 5707 [2022-03-20 17:17:11,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:11,382 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:11,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2022-03-20 17:17:11,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5705. [2022-03-20 17:17:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5701 states have (on average 1.5835818277495177) internal successors, (9028), 5701 states have internal predecessors, (9028), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 9031 transitions. [2022-03-20 17:17:11,864 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 9031 transitions. Word has length 33 [2022-03-20 17:17:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:11,864 INFO L478 AbstractCegarLoop]: Abstraction has 5705 states and 9031 transitions. [2022-03-20 17:17:11,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 9031 transitions. [2022-03-20 17:17:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:17:11,870 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:11,870 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:11,870 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 17:17:11,870 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:11,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1490633615, now seen corresponding path program 1 times [2022-03-20 17:17:11,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:11,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [476221749] [2022-03-20 17:17:11,871 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:11,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1490633615, now seen corresponding path program 2 times [2022-03-20 17:17:11,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:11,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898753803] [2022-03-20 17:17:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:11,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:11,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:11,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898753803] [2022-03-20 17:17:11,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898753803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:11,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:11,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:11,889 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [476221749] [2022-03-20 17:17:11,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [476221749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:11,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:11,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:11,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417700158] [2022-03-20 17:17:11,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:11,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:11,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:11,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:11,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:11,890 INFO L87 Difference]: Start difference. First operand 5705 states and 9031 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:12,690 INFO L93 Difference]: Finished difference Result 10253 states and 16585 transitions. [2022-03-20 17:17:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:12,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 17:17:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:12,706 INFO L225 Difference]: With dead ends: 10253 [2022-03-20 17:17:12,706 INFO L226 Difference]: Without dead ends: 10251 [2022-03-20 17:17:12,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:12,707 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 204 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:12,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 101 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10251 states. [2022-03-20 17:17:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10251 to 8201. [2022-03-20 17:17:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8197 states have (on average 1.5386116872026352) internal successors, (12612), 8197 states have internal predecessors, (12612), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 12615 transitions. [2022-03-20 17:17:13,265 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 12615 transitions. Word has length 33 [2022-03-20 17:17:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:13,265 INFO L478 AbstractCegarLoop]: Abstraction has 8201 states and 12615 transitions. [2022-03-20 17:17:13,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 12615 transitions. [2022-03-20 17:17:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:17:13,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:13,317 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:13,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 17:17:13,318 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:13,318 INFO L85 PathProgramCache]: Analyzing trace with hash -503511091, now seen corresponding path program 1 times [2022-03-20 17:17:13,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:13,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [285359187] [2022-03-20 17:17:13,318 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash -503511091, now seen corresponding path program 2 times [2022-03-20 17:17:13,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:13,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254332034] [2022-03-20 17:17:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:13,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:13,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:13,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:13,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254332034] [2022-03-20 17:17:13,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254332034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:13,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:13,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:13,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:13,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [285359187] [2022-03-20 17:17:13,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [285359187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:13,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:13,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:13,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769340297] [2022-03-20 17:17:13,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:13,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:13,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:13,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:13,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:13,345 INFO L87 Difference]: Start difference. First operand 8201 states and 12615 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:14,321 INFO L93 Difference]: Finished difference Result 19213 states and 29769 transitions. [2022-03-20 17:17:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:14,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 17:17:14,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:14,341 INFO L225 Difference]: With dead ends: 19213 [2022-03-20 17:17:14,341 INFO L226 Difference]: Without dead ends: 11147 [2022-03-20 17:17:14,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:14,356 INFO L913 BasicCegarLoop]: 142 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:14,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 149 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:14,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11147 states. [2022-03-20 17:17:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11147 to 11145. [2022-03-20 17:17:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11145 states, 11141 states have (on average 1.5398976752535678) internal successors, (17156), 11141 states have internal predecessors, (17156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 17159 transitions. [2022-03-20 17:17:15,368 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 17159 transitions. Word has length 33 [2022-03-20 17:17:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:15,369 INFO L478 AbstractCegarLoop]: Abstraction has 11145 states and 17159 transitions. [2022-03-20 17:17:15,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:15,369 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 17159 transitions. [2022-03-20 17:17:15,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:17:15,377 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:15,377 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:15,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 17:17:15,377 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1034784041, now seen corresponding path program 1 times [2022-03-20 17:17:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:15,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [699389426] [2022-03-20 17:17:15,378 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:15,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1034784041, now seen corresponding path program 2 times [2022-03-20 17:17:15,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:15,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798824760] [2022-03-20 17:17:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:15,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:15,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:15,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:15,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798824760] [2022-03-20 17:17:15,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798824760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:15,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:15,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:15,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:15,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [699389426] [2022-03-20 17:17:15,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [699389426] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:15,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:15,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:15,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931813089] [2022-03-20 17:17:15,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:15,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:15,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:15,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:15,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:15,397 INFO L87 Difference]: Start difference. First operand 11145 states and 17159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:16,275 INFO L93 Difference]: Finished difference Result 16717 states and 25673 transitions. [2022-03-20 17:17:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 17:17:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:16,294 INFO L225 Difference]: With dead ends: 16717 [2022-03-20 17:17:16,295 INFO L226 Difference]: Without dead ends: 11275 [2022-03-20 17:17:16,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:16,308 INFO L913 BasicCegarLoop]: 135 mSDtfsCounter, 189 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:16,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 142 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2022-03-20 17:17:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11273. [2022-03-20 17:17:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.5224066021829799) internal successors, (17156), 11269 states have internal predecessors, (17156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 17159 transitions. [2022-03-20 17:17:17,226 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 17159 transitions. Word has length 34 [2022-03-20 17:17:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:17,226 INFO L478 AbstractCegarLoop]: Abstraction has 11273 states and 17159 transitions. [2022-03-20 17:17:17,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 17159 transitions. [2022-03-20 17:17:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:17:17,234 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:17,235 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:17,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 17:17:17,235 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:17,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:17,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1571239513, now seen corresponding path program 1 times [2022-03-20 17:17:17,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:17,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [132630274] [2022-03-20 17:17:17,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:17,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1571239513, now seen corresponding path program 2 times [2022-03-20 17:17:17,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:17,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004615803] [2022-03-20 17:17:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:17,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:17,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:17,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004615803] [2022-03-20 17:17:17,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004615803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:17,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:17,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:17,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [132630274] [2022-03-20 17:17:17,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [132630274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:17,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:17,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:17,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365552313] [2022-03-20 17:17:17,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:17,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:17,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:17,255 INFO L87 Difference]: Start difference. First operand 11273 states and 17159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:18,980 INFO L93 Difference]: Finished difference Result 19981 states and 31113 transitions. [2022-03-20 17:17:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:18,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 17:17:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:19,011 INFO L225 Difference]: With dead ends: 19981 [2022-03-20 17:17:19,011 INFO L226 Difference]: Without dead ends: 19979 [2022-03-20 17:17:19,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:19,019 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 197 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:19,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:19,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19979 states. [2022-03-20 17:17:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19979 to 16393. [2022-03-20 17:17:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16393 states, 16389 states have (on average 1.4763560925010677) internal successors, (24196), 16389 states have internal predecessors, (24196), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16393 states to 16393 states and 24199 transitions. [2022-03-20 17:17:20,509 INFO L78 Accepts]: Start accepts. Automaton has 16393 states and 24199 transitions. Word has length 34 [2022-03-20 17:17:20,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:20,509 INFO L478 AbstractCegarLoop]: Abstraction has 16393 states and 24199 transitions. [2022-03-20 17:17:20,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 16393 states and 24199 transitions. [2022-03-20 17:17:20,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:17:20,522 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:20,522 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:20,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 17:17:20,523 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:20,523 INFO L85 PathProgramCache]: Analyzing trace with hash -422905193, now seen corresponding path program 1 times [2022-03-20 17:17:20,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:20,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [867352467] [2022-03-20 17:17:20,525 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:20,526 INFO L85 PathProgramCache]: Analyzing trace with hash -422905193, now seen corresponding path program 2 times [2022-03-20 17:17:20,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:20,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034156873] [2022-03-20 17:17:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:20,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:20,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:20,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:20,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034156873] [2022-03-20 17:17:20,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034156873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:20,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:20,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:20,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:20,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [867352467] [2022-03-20 17:17:20,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [867352467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:20,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:20,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:20,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437553781] [2022-03-20 17:17:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:20,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:20,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:20,554 INFO L87 Difference]: Start difference. First operand 16393 states and 24199 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:22,402 INFO L93 Difference]: Finished difference Result 38157 states and 56713 transitions. [2022-03-20 17:17:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:22,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 17:17:22,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:22,437 INFO L225 Difference]: With dead ends: 38157 [2022-03-20 17:17:22,437 INFO L226 Difference]: Without dead ends: 22027 [2022-03-20 17:17:22,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:22,466 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:22,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 151 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22027 states. [2022-03-20 17:17:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22027 to 22025. [2022-03-20 17:17:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22025 states, 22021 states have (on average 1.4765905272240134) internal successors, (32516), 22021 states have internal predecessors, (32516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22025 states to 22025 states and 32519 transitions. [2022-03-20 17:17:24,343 INFO L78 Accepts]: Start accepts. Automaton has 22025 states and 32519 transitions. Word has length 34 [2022-03-20 17:17:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:24,343 INFO L478 AbstractCegarLoop]: Abstraction has 22025 states and 32519 transitions. [2022-03-20 17:17:24,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:24,343 INFO L276 IsEmpty]: Start isEmpty. Operand 22025 states and 32519 transitions. [2022-03-20 17:17:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 17:17:24,357 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:24,357 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:24,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 17:17:24,357 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1463999138, now seen corresponding path program 1 times [2022-03-20 17:17:24,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:24,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1192569480] [2022-03-20 17:17:24,359 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1463999138, now seen corresponding path program 2 times [2022-03-20 17:17:24,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:24,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288321908] [2022-03-20 17:17:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:24,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:24,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:24,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288321908] [2022-03-20 17:17:24,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288321908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:24,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:24,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:24,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:24,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1192569480] [2022-03-20 17:17:24,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1192569480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:24,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:24,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550894024] [2022-03-20 17:17:24,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:24,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:24,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:24,381 INFO L87 Difference]: Start difference. First operand 22025 states and 32519 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:26,352 INFO L93 Difference]: Finished difference Result 33037 states and 48649 transitions. [2022-03-20 17:17:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 17:17:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:26,384 INFO L225 Difference]: With dead ends: 33037 [2022-03-20 17:17:26,385 INFO L226 Difference]: Without dead ends: 22283 [2022-03-20 17:17:26,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:26,409 INFO L913 BasicCegarLoop]: 132 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:26,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 139 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:26,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2022-03-20 17:17:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 22281. [2022-03-20 17:17:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22281 states, 22277 states have (on average 1.4596220316918795) internal successors, (32516), 22277 states have internal predecessors, (32516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22281 states to 22281 states and 32519 transitions. [2022-03-20 17:17:28,370 INFO L78 Accepts]: Start accepts. Automaton has 22281 states and 32519 transitions. Word has length 35 [2022-03-20 17:17:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:28,370 INFO L478 AbstractCegarLoop]: Abstraction has 22281 states and 32519 transitions. [2022-03-20 17:17:28,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:28,370 INFO L276 IsEmpty]: Start isEmpty. Operand 22281 states and 32519 transitions. [2022-03-20 17:17:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 17:17:28,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:28,384 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:28,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 17:17:28,384 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash -224944604, now seen corresponding path program 1 times [2022-03-20 17:17:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:28,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1388985856] [2022-03-20 17:17:28,385 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:28,385 INFO L85 PathProgramCache]: Analyzing trace with hash -224944604, now seen corresponding path program 2 times [2022-03-20 17:17:28,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:28,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229337323] [2022-03-20 17:17:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:28,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:28,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:28,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:28,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229337323] [2022-03-20 17:17:28,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229337323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:28,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:28,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:28,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:28,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1388985856] [2022-03-20 17:17:28,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1388985856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:28,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:28,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:28,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19157752] [2022-03-20 17:17:28,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:28,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:28,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:28,408 INFO L87 Difference]: Start difference. First operand 22281 states and 32519 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:32,091 INFO L93 Difference]: Finished difference Result 65293 states and 94473 transitions. [2022-03-20 17:17:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 17:17:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:32,167 INFO L225 Difference]: With dead ends: 65293 [2022-03-20 17:17:32,167 INFO L226 Difference]: Without dead ends: 43531 [2022-03-20 17:17:32,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:32,223 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:32,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 117 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:32,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43531 states. [2022-03-20 17:17:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43531 to 43529. [2022-03-20 17:17:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43529 states, 43525 states have (on average 1.4234577828834003) internal successors, (61956), 43525 states have internal predecessors, (61956), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43529 states to 43529 states and 61959 transitions. [2022-03-20 17:17:36,320 INFO L78 Accepts]: Start accepts. Automaton has 43529 states and 61959 transitions. Word has length 35 [2022-03-20 17:17:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:36,320 INFO L478 AbstractCegarLoop]: Abstraction has 43529 states and 61959 transitions. [2022-03-20 17:17:36,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 43529 states and 61959 transitions. [2022-03-20 17:17:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 17:17:36,340 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:36,341 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:36,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 17:17:36,341 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:36,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1769200102, now seen corresponding path program 1 times [2022-03-20 17:17:36,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:36,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [556736126] [2022-03-20 17:17:36,342 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1769200102, now seen corresponding path program 2 times [2022-03-20 17:17:36,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:36,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017805058] [2022-03-20 17:17:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:36,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:36,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:36,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:36,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017805058] [2022-03-20 17:17:36,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017805058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:36,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:36,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:36,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:36,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [556736126] [2022-03-20 17:17:36,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [556736126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:36,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:36,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:36,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340981761] [2022-03-20 17:17:36,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:36,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:36,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:36,366 INFO L87 Difference]: Start difference. First operand 43529 states and 61959 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:41,060 INFO L93 Difference]: Finished difference Result 49677 states and 73225 transitions. [2022-03-20 17:17:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:41,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 17:17:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:41,154 INFO L225 Difference]: With dead ends: 49677 [2022-03-20 17:17:41,154 INFO L226 Difference]: Without dead ends: 49675 [2022-03-20 17:17:41,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:41,174 INFO L913 BasicCegarLoop]: 149 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:41,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 156 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49675 states. [2022-03-20 17:17:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49675 to 43529. [2022-03-20 17:17:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43529 states, 43525 states have (on average 1.411694428489374) internal successors, (61444), 43525 states have internal predecessors, (61444), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43529 states to 43529 states and 61447 transitions. [2022-03-20 17:17:45,318 INFO L78 Accepts]: Start accepts. Automaton has 43529 states and 61447 transitions. Word has length 35 [2022-03-20 17:17:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:45,319 INFO L478 AbstractCegarLoop]: Abstraction has 43529 states and 61447 transitions. [2022-03-20 17:17:45,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 43529 states and 61447 transitions. [2022-03-20 17:17:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 17:17:45,345 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:45,345 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:45,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 17:17:45,346 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:45,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1616866700, now seen corresponding path program 1 times [2022-03-20 17:17:45,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:45,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [446609799] [2022-03-20 17:17:45,355 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:45,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1616866700, now seen corresponding path program 2 times [2022-03-20 17:17:45,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:45,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108487974] [2022-03-20 17:17:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:45,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:45,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:45,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108487974] [2022-03-20 17:17:45,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108487974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:45,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:45,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:45,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:45,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [446609799] [2022-03-20 17:17:45,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [446609799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:45,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:45,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:45,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213976543] [2022-03-20 17:17:45,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:45,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:45,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:45,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:45,412 INFO L87 Difference]: Start difference. First operand 43529 states and 61447 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:52,506 INFO L93 Difference]: Finished difference Result 75277 states and 108553 transitions. [2022-03-20 17:17:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:52,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-20 17:17:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:52,749 INFO L225 Difference]: With dead ends: 75277 [2022-03-20 17:17:52,750 INFO L226 Difference]: Without dead ends: 75275 [2022-03-20 17:17:52,770 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:17:52,770 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:52,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75275 states. [2022-03-20 17:17:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75275 to 65033. [2022-03-20 17:17:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65033 states, 65029 states have (on average 1.3700349075028064) internal successors, (89092), 65029 states have internal predecessors, (89092), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65033 states to 65033 states and 89095 transitions. [2022-03-20 17:17:59,145 INFO L78 Accepts]: Start accepts. Automaton has 65033 states and 89095 transitions. Word has length 36 [2022-03-20 17:17:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:59,146 INFO L478 AbstractCegarLoop]: Abstraction has 65033 states and 89095 transitions. [2022-03-20 17:17:59,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:17:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 65033 states and 89095 transitions. [2022-03-20 17:17:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 17:17:59,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:59,193 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:17:59,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 17:17:59,193 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash -377278006, now seen corresponding path program 1 times [2022-03-20 17:17:59,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:59,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1901228418] [2022-03-20 17:17:59,194 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:59,194 INFO L85 PathProgramCache]: Analyzing trace with hash -377278006, now seen corresponding path program 2 times [2022-03-20 17:17:59,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:59,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868552496] [2022-03-20 17:17:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:59,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:59,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:59,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:59,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868552496] [2022-03-20 17:17:59,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868552496] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:59,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:59,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:59,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:59,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1901228418] [2022-03-20 17:17:59,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1901228418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:59,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:59,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749760793] [2022-03-20 17:17:59,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:59,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:59,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:59,212 INFO L87 Difference]: Start difference. First operand 65033 states and 89095 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:18:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:18:07,379 INFO L93 Difference]: Finished difference Result 150029 states and 206857 transitions. [2022-03-20 17:18:07,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:18:07,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-20 17:18:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:18:07,556 INFO L225 Difference]: With dead ends: 150029 [2022-03-20 17:18:07,556 INFO L226 Difference]: Without dead ends: 85515 [2022-03-20 17:18:07,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:18:07,895 INFO L913 BasicCegarLoop]: 148 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:18:07,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 155 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:18:07,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85515 states. [2022-03-20 17:18:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85515 to 85513. [2022-03-20 17:18:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85513 states, 85509 states have (on average 1.3652364078634998) internal successors, (116740), 85509 states have internal predecessors, (116740), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:18:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85513 states to 85513 states and 116743 transitions. [2022-03-20 17:18:16,586 INFO L78 Accepts]: Start accepts. Automaton has 85513 states and 116743 transitions. Word has length 36 [2022-03-20 17:18:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:18:16,586 INFO L478 AbstractCegarLoop]: Abstraction has 85513 states and 116743 transitions. [2022-03-20 17:18:16,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:18:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 85513 states and 116743 transitions. [2022-03-20 17:18:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:18:16,662 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:18:16,662 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:18:16,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 17:18:16,662 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:18:16,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:18:16,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1416524679, now seen corresponding path program 1 times [2022-03-20 17:18:16,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:18:16,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1774609372] [2022-03-20 17:18:16,663 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:18:16,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1416524679, now seen corresponding path program 2 times [2022-03-20 17:18:16,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:18:16,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754318254] [2022-03-20 17:18:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:18:16,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:18:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:18:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:18:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:18:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:18:16,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:18:16,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754318254] [2022-03-20 17:18:16,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754318254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:18:16,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:18:16,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:18:16,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:18:16,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1774609372] [2022-03-20 17:18:16,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1774609372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:18:16,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:18:16,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:18:16,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253697966] [2022-03-20 17:18:16,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:18:16,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:18:16,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:18:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:18:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:18:16,696 INFO L87 Difference]: Start difference. First operand 85513 states and 116743 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:18:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:18:25,138 INFO L93 Difference]: Finished difference Result 129037 states and 176137 transitions. [2022-03-20 17:18:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:18:25,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 17:18:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:18:25,302 INFO L225 Difference]: With dead ends: 129037 [2022-03-20 17:18:25,302 INFO L226 Difference]: Without dead ends: 87051 [2022-03-20 17:18:25,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:18:25,378 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 186 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:18:25,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:18:25,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87051 states. [2022-03-20 17:18:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87051 to 87049. [2022-03-20 17:18:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87049 states, 87045 states have (on average 1.3529094146705727) internal successors, (117764), 87045 states have internal predecessors, (117764), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:18:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87049 states to 87049 states and 117767 transitions. [2022-03-20 17:18:34,226 INFO L78 Accepts]: Start accepts. Automaton has 87049 states and 117767 transitions. Word has length 37 [2022-03-20 17:18:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:18:34,226 INFO L478 AbstractCegarLoop]: Abstraction has 87049 states and 117767 transitions. [2022-03-20 17:18:34,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:18:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 87049 states and 117767 transitions. [2022-03-20 17:18:34,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:18:34,283 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:18:34,283 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:18:34,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 17:18:34,284 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:18:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:18:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1189498875, now seen corresponding path program 1 times [2022-03-20 17:18:34,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:18:34,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [385533911] [2022-03-20 17:18:34,284 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:18:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1189498875, now seen corresponding path program 2 times [2022-03-20 17:18:34,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:18:34,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237927103] [2022-03-20 17:18:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:18:34,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:18:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:18:34,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:18:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:18:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:18:34,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:18:34,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237927103] [2022-03-20 17:18:34,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237927103] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:18:34,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:18:34,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:18:34,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:18:34,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [385533911] [2022-03-20 17:18:34,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [385533911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:18:34,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:18:34,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:18:34,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110508458] [2022-03-20 17:18:34,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:18:34,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:18:34,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:18:34,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:18:34,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:18:34,352 INFO L87 Difference]: Start difference. First operand 87049 states and 117767 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:18:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:18:49,111 INFO L93 Difference]: Finished difference Result 147469 states and 202761 transitions. [2022-03-20 17:18:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:18:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 17:18:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:18:49,431 INFO L225 Difference]: With dead ends: 147469 [2022-03-20 17:18:49,431 INFO L226 Difference]: Without dead ends: 147467 [2022-03-20 17:18:49,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:18:49,481 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:18:49,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:18:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2022-03-20 17:19:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 131081. [2022-03-20 17:19:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131077 states have (on average 1.312480450422271) internal successors, (172036), 131077 states have internal predecessors, (172036), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:19:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 172039 transitions. [2022-03-20 17:19:03,559 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 172039 transitions. Word has length 37 [2022-03-20 17:19:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:19:03,559 INFO L478 AbstractCegarLoop]: Abstraction has 131081 states and 172039 transitions. [2022-03-20 17:19:03,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:19:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 172039 transitions. [2022-03-20 17:19:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:19:03,661 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:19:03,661 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:19:03,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 17:19:03,661 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:19:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:19:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash -804645831, now seen corresponding path program 1 times [2022-03-20 17:19:03,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:19:03,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098238697] [2022-03-20 17:19:03,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:19:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash -804645831, now seen corresponding path program 2 times [2022-03-20 17:19:03,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:19:03,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57474987] [2022-03-20 17:19:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:19:03,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:19:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:19:03,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:19:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:19:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:19:03,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:19:03,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57474987] [2022-03-20 17:19:03,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57474987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:19:03,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:19:03,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:19:03,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:19:03,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098238697] [2022-03-20 17:19:03,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098238697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:19:03,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:19:03,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:19:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203436848] [2022-03-20 17:19:03,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:19:03,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:19:03,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:19:03,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:19:03,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:19:03,717 INFO L87 Difference]: Start difference. First operand 131081 states and 172039 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:19:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:19:21,496 INFO L93 Difference]: Finished difference Result 299021 states and 393225 transitions. [2022-03-20 17:19:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:19:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 17:19:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:19:22,131 INFO L225 Difference]: With dead ends: 299021 [2022-03-20 17:19:22,131 INFO L226 Difference]: Without dead ends: 169995 [2022-03-20 17:19:22,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:19:22,294 INFO L913 BasicCegarLoop]: 150 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:19:22,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 157 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:19:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169995 states.