/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 04:14:00,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 04:14:00,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 04:14:00,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 04:14:00,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 04:14:00,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 04:14:00,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 04:14:00,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 04:14:00,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 04:14:00,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 04:14:00,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 04:14:00,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 04:14:00,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 04:14:00,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 04:14:00,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 04:14:00,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 04:14:00,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 04:14:00,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 04:14:00,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 04:14:00,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 04:14:00,750 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 04:14:00,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 04:14:00,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 04:14:00,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 04:14:00,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 04:14:00,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-05 04:14:00,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-05 04:14:00,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-05 04:14:00,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-05 04:14:00,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-05 04:14:00,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-05 04:14:00,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-05 04:14:00,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-05 04:14:00,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-05 04:14:00,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-05 04:14:00,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-05 04:14:00,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-05 04:14:00,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-05 04:14:00,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-05 04:14:00,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 04:14:00,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 04:14:00,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 04:14:00,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 04:14:00,774 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 04:14:00,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 04:14:00,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 04:14:00,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 04:14:00,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 04:14:00,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 04:14:00,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 04:14:00,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 04:14:00,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 04:14:00,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 04:14:00,776 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 04:14:00,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 04:14:00,776 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 04:14:00,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 04:14:00,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 04:14:00,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 04:14:00,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 04:14:00,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 04:14:00,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:14:00,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 04:14:00,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 04:14:00,777 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 04:14:00,777 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 04:14:00,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 04:14:00,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 04:14:00,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 04:14:00,948 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 04:14:00,948 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 04:14:00,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2022-04-05 04:14:00,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c17ef203/3020591f143748cfaf30a30320926bde/FLAG49a6c2e6d [2022-04-05 04:14:01,412 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 04:14:01,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c [2022-04-05 04:14:01,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c17ef203/3020591f143748cfaf30a30320926bde/FLAG49a6c2e6d [2022-04-05 04:14:01,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c17ef203/3020591f143748cfaf30a30320926bde [2022-04-05 04:14:01,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 04:14:01,428 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 04:14:01,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 04:14:01,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 04:14:01,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 04:14:01,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:14:01" (1/1) ... [2022-04-05 04:14:01,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53e54db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01, skipping insertion in model container [2022-04-05 04:14:01,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:14:01" (1/1) ... [2022-04-05 04:14:01,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 04:14:01,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 04:14:01,605 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_14-1.c[5283,5296] [2022-04-05 04:14:01,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:14:01,614 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 04:14:01,643 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c[5283,5296] [2022-04-05 04:14:01,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:14:01,657 INFO L208 MainTranslator]: Completed translation [2022-04-05 04:14:01,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01 WrapperNode [2022-04-05 04:14:01,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 04:14:01,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 04:14:01,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 04:14:01,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 04:14:01,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01" (1/1) ... [2022-04-05 04:14:01,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01" (1/1) ... [2022-04-05 04:14:01,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01" (1/1) ... [2022-04-05 04:14:01,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01" (1/1) ... [2022-04-05 04:14:01,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01" (1/1) ... [2022-04-05 04:14:01,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01" (1/1) ... [2022-04-05 04:14:01,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01" (1/1) ... [2022-04-05 04:14:01,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 04:14:01,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 04:14:01,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 04:14:01,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 04:14:01,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01" (1/1) ... [2022-04-05 04:14:01,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:14:01,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:14:01,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 04:14:01,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 04:14:01,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 04:14:01,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 04:14:01,771 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 04:14:01,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 04:14:01,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 04:14:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 04:14:01,819 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 04:14:01,820 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 04:14:02,053 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 04:14:02,058 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 04:14:02,058 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 04:14:02,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:14:02 BoogieIcfgContainer [2022-04-05 04:14:02,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 04:14:02,060 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 04:14:02,060 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 04:14:02,071 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 04:14:02,074 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:14:02" (1/1) ... [2022-04-05 04:14:02,075 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 04:14:02,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:14:02 BasicIcfg [2022-04-05 04:14:02,095 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 04:14:02,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 04:14:02,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 04:14:02,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 04:14:02,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 04:14:01" (1/4) ... [2022-04-05 04:14:02,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41887fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:14:02, skipping insertion in model container [2022-04-05 04:14:02,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:14:01" (2/4) ... [2022-04-05 04:14:02,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41887fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:14:02, skipping insertion in model container [2022-04-05 04:14:02,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:14:02" (3/4) ... [2022-04-05 04:14:02,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41887fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 04:14:02, skipping insertion in model container [2022-04-05 04:14:02,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:14:02" (4/4) ... [2022-04-05 04:14:02,112 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.cJordan [2022-04-05 04:14:02,115 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 04:14:02,116 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 04:14:02,164 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 04:14:02,169 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 04:14:02,170 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 04:14:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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) [2022-04-05 04:14:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:14:02,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:02,186 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] [2022-04-05 04:14:02,187 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:02,194 INFO L85 PathProgramCache]: Analyzing trace with hash 267710119, now seen corresponding path program 1 times [2022-04-05 04:14:02,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:02,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756611313] [2022-04-05 04:14:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:02,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:02,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:02,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:02,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756611313] [2022-04-05 04:14:02,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756611313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:02,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:02,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:02,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250098247] [2022-04-05 04:14:02,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:02,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:02,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:02,493 INFO L87 Difference]: Start difference. First operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-04-05 04:14:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:02,666 INFO L93 Difference]: Finished difference Result 105 states and 186 transitions. [2022-04-05 04:14:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:02,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-04-05 04:14:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:02,674 INFO L225 Difference]: With dead ends: 105 [2022-04-05 04:14:02,674 INFO L226 Difference]: Without dead ends: 97 [2022-04-05 04:14:02,676 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 [2022-04-05 04:14:02,678 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 242 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:02,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 113 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-05 04:14:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-04-05 04:14:02,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 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) [2022-04-05 04:14:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-04-05 04:14:02,711 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 25 [2022-04-05 04:14:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:02,712 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-04-05 04:14:02,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-04-05 04:14:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-04-05 04:14:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:14:02,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:02,713 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] [2022-04-05 04:14:02,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 04:14:02,713 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1621019816, now seen corresponding path program 1 times [2022-04-05 04:14:02,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:02,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517490267] [2022-04-05 04:14:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:02,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:02,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:02,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:02,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517490267] [2022-04-05 04:14:02,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517490267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:02,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:02,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:02,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125596666] [2022-04-05 04:14:02,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:02,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:02,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:02,766 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-04-05 04:14:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:02,876 INFO L93 Difference]: Finished difference Result 97 states and 175 transitions. [2022-04-05 04:14:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-04-05 04:14:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:02,880 INFO L225 Difference]: With dead ends: 97 [2022-04-05 04:14:02,880 INFO L226 Difference]: Without dead ends: 97 [2022-04-05 04:14:02,883 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 [2022-04-05 04:14:02,885 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 127 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 [2022-04-05 04:14:02,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 127 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-05 04:14:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-04-05 04:14:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.879120879120879) internal successors, (171), 91 states have internal predecessors, (171), 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) [2022-04-05 04:14:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 174 transitions. [2022-04-05 04:14:02,899 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 174 transitions. Word has length 25 [2022-04-05 04:14:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:02,900 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 174 transitions. [2022-04-05 04:14:02,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-04-05 04:14:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 174 transitions. [2022-04-05 04:14:02,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 04:14:02,900 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:02,901 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] [2022-04-05 04:14:02,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 04:14:02,901 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:02,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:02,901 INFO L85 PathProgramCache]: Analyzing trace with hash -290888810, now seen corresponding path program 1 times [2022-04-05 04:14:02,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:02,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63008256] [2022-04-05 04:14:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:02,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:02,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:02,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:02,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63008256] [2022-04-05 04:14:02,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63008256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:02,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:02,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:02,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683741378] [2022-04-05 04:14:02,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:02,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:02,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:02,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:02,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:02,979 INFO L87 Difference]: Start difference. First operand 95 states and 174 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) [2022-04-05 04:14:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:03,120 INFO L93 Difference]: Finished difference Result 100 states and 177 transitions. [2022-04-05 04:14:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:03,121 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 [2022-04-05 04:14:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:03,122 INFO L225 Difference]: With dead ends: 100 [2022-04-05 04:14:03,122 INFO L226 Difference]: Without dead ends: 100 [2022-04-05 04:14:03,122 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 [2022-04-05 04:14:03,123 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 153 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 [2022-04-05 04:14:03,123 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 153 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-05 04:14:03,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-04-05 04:14:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.8404255319148937) internal successors, (173), 94 states have internal predecessors, (173), 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) [2022-04-05 04:14:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 176 transitions. [2022-04-05 04:14:03,130 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 176 transitions. Word has length 26 [2022-04-05 04:14:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:03,130 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 176 transitions. [2022-04-05 04:14:03,130 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) [2022-04-05 04:14:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 176 transitions. [2022-04-05 04:14:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 04:14:03,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:03,131 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] [2022-04-05 04:14:03,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 04:14:03,132 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1287961163, now seen corresponding path program 1 times [2022-04-05 04:14:03,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:03,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062485326] [2022-04-05 04:14:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:03,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:03,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:03,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062485326] [2022-04-05 04:14:03,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062485326] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:03,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:03,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:03,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217359219] [2022-04-05 04:14:03,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:03,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:03,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:03,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:03,192 INFO L87 Difference]: Start difference. First operand 98 states and 176 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) [2022-04-05 04:14:03,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:03,282 INFO L93 Difference]: Finished difference Result 183 states and 334 transitions. [2022-04-05 04:14:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:03,283 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 [2022-04-05 04:14:03,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:03,285 INFO L225 Difference]: With dead ends: 183 [2022-04-05 04:14:03,286 INFO L226 Difference]: Without dead ends: 183 [2022-04-05 04:14:03,286 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 [2022-04-05 04:14:03,296 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 229 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 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 [2022-04-05 04:14:03,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 101 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-05 04:14:03,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2022-04-05 04:14:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.84) internal successors, (230), 125 states have internal predecessors, (230), 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) [2022-04-05 04:14:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 233 transitions. [2022-04-05 04:14:03,305 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 233 transitions. Word has length 26 [2022-04-05 04:14:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:03,305 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 233 transitions. [2022-04-05 04:14:03,305 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) [2022-04-05 04:14:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 233 transitions. [2022-04-05 04:14:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 04:14:03,306 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:03,306 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] [2022-04-05 04:14:03,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 04:14:03,307 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:03,308 INFO L85 PathProgramCache]: Analyzing trace with hash 65348534, now seen corresponding path program 1 times [2022-04-05 04:14:03,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:03,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365748615] [2022-04-05 04:14:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:03,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:03,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:03,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365748615] [2022-04-05 04:14:03,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365748615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:03,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:03,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:03,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375668040] [2022-04-05 04:14:03,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:03,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:03,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:03,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:03,384 INFO L87 Difference]: Start difference. First operand 129 states and 233 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) [2022-04-05 04:14:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:03,472 INFO L93 Difference]: Finished difference Result 185 states and 332 transitions. [2022-04-05 04:14:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:03,474 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 [2022-04-05 04:14:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:03,475 INFO L225 Difference]: With dead ends: 185 [2022-04-05 04:14:03,475 INFO L226 Difference]: Without dead ends: 185 [2022-04-05 04:14:03,476 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 [2022-04-05 04:14:03,476 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 202 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 129 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 [2022-04-05 04:14:03,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 129 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-05 04:14:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-04-05 04:14:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8324022346368716) internal successors, (328), 179 states have internal predecessors, (328), 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) [2022-04-05 04:14:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 331 transitions. [2022-04-05 04:14:03,499 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 331 transitions. Word has length 26 [2022-04-05 04:14:03,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:03,499 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 331 transitions. [2022-04-05 04:14:03,499 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) [2022-04-05 04:14:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 331 transitions. [2022-04-05 04:14:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 04:14:03,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:03,500 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] [2022-04-05 04:14:03,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-05 04:14:03,500 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1272058172, now seen corresponding path program 1 times [2022-04-05 04:14:03,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:03,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393424385] [2022-04-05 04:14:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:03,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393424385] [2022-04-05 04:14:03,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393424385] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:03,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:03,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:03,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741732333] [2022-04-05 04:14:03,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:03,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:03,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:03,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:03,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:03,564 INFO L87 Difference]: Start difference. First operand 183 states and 331 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) [2022-04-05 04:14:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:03,637 INFO L93 Difference]: Finished difference Result 187 states and 332 transitions. [2022-04-05 04:14:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:03,637 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 [2022-04-05 04:14:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:03,639 INFO L225 Difference]: With dead ends: 187 [2022-04-05 04:14:03,639 INFO L226 Difference]: Without dead ends: 187 [2022-04-05 04:14:03,639 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 [2022-04-05 04:14:03,639 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 182 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 150 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 [2022-04-05 04:14:03,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 150 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-05 04:14:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2022-04-05 04:14:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 1.8121546961325967) internal successors, (328), 181 states have internal predecessors, (328), 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) [2022-04-05 04:14:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 331 transitions. [2022-04-05 04:14:03,646 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 331 transitions. Word has length 27 [2022-04-05 04:14:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:03,647 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 331 transitions. [2022-04-05 04:14:03,647 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) [2022-04-05 04:14:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 331 transitions. [2022-04-05 04:14:03,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 04:14:03,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:03,648 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] [2022-04-05 04:14:03,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-05 04:14:03,648 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:03,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2025836771, now seen corresponding path program 1 times [2022-04-05 04:14:03,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:03,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382923543] [2022-04-05 04:14:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:03,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:03,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:03,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382923543] [2022-04-05 04:14:03,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382923543] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:03,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:03,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:03,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057914097] [2022-04-05 04:14:03,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:03,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:03,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:03,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:03,701 INFO L87 Difference]: Start difference. First operand 185 states and 331 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) [2022-04-05 04:14:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:03,784 INFO L93 Difference]: Finished difference Result 347 states and 628 transitions. [2022-04-05 04:14:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:03,784 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 [2022-04-05 04:14:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:03,786 INFO L225 Difference]: With dead ends: 347 [2022-04-05 04:14:03,786 INFO L226 Difference]: Without dead ends: 347 [2022-04-05 04:14:03,786 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 [2022-04-05 04:14:03,787 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 222 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 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 [2022-04-05 04:14:03,787 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-04-05 04:14:03,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 249. [2022-04-05 04:14:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 245 states have (on average 1.7959183673469388) internal successors, (440), 245 states have internal predecessors, (440), 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) [2022-04-05 04:14:03,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 443 transitions. [2022-04-05 04:14:03,795 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 443 transitions. Word has length 27 [2022-04-05 04:14:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:03,795 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 443 transitions. [2022-04-05 04:14:03,795 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) [2022-04-05 04:14:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 443 transitions. [2022-04-05 04:14:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 04:14:03,797 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:03,797 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] [2022-04-05 04:14:03,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-05 04:14:03,797 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash -915820828, now seen corresponding path program 1 times [2022-04-05 04:14:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:03,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541138657] [2022-04-05 04:14:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:03,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:03,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:03,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541138657] [2022-04-05 04:14:03,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541138657] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:03,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:03,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:03,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845366276] [2022-04-05 04:14:03,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:03,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:03,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:03,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:03,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:03,828 INFO L87 Difference]: Start difference. First operand 249 states and 443 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) [2022-04-05 04:14:03,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:03,901 INFO L93 Difference]: Finished difference Result 355 states and 628 transitions. [2022-04-05 04:14:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:03,904 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 [2022-04-05 04:14:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:03,905 INFO L225 Difference]: With dead ends: 355 [2022-04-05 04:14:03,906 INFO L226 Difference]: Without dead ends: 355 [2022-04-05 04:14:03,906 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 [2022-04-05 04:14:03,906 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 131 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 [2022-04-05 04:14:03,907 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 131 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:03,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-04-05 04:14:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2022-04-05 04:14:03,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 349 states have (on average 1.7879656160458453) internal successors, (624), 349 states have internal predecessors, (624), 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) [2022-04-05 04:14:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 627 transitions. [2022-04-05 04:14:03,915 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 627 transitions. Word has length 27 [2022-04-05 04:14:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:03,915 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 627 transitions. [2022-04-05 04:14:03,915 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) [2022-04-05 04:14:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 627 transitions. [2022-04-05 04:14:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:14:03,916 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:03,916 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] [2022-04-05 04:14:03,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-05 04:14:03,917 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:03,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1623537198, now seen corresponding path program 1 times [2022-04-05 04:14:03,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:03,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99954411] [2022-04-05 04:14:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:03,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:03,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:03,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99954411] [2022-04-05 04:14:03,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99954411] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:03,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:03,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:03,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370517916] [2022-04-05 04:14:03,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:03,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:03,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:03,961 INFO L87 Difference]: Start difference. First operand 353 states and 627 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) [2022-04-05 04:14:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:04,034 INFO L93 Difference]: Finished difference Result 359 states and 628 transitions. [2022-04-05 04:14:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:04,034 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 [2022-04-05 04:14:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:04,038 INFO L225 Difference]: With dead ends: 359 [2022-04-05 04:14:04,038 INFO L226 Difference]: Without dead ends: 359 [2022-04-05 04:14:04,038 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 [2022-04-05 04:14:04,040 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 147 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 [2022-04-05 04:14:04,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 147 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-05 04:14:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-04-05 04:14:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.7677053824362605) internal successors, (624), 353 states have internal predecessors, (624), 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) [2022-04-05 04:14:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 627 transitions. [2022-04-05 04:14:04,049 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 627 transitions. Word has length 28 [2022-04-05 04:14:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:04,049 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 627 transitions. [2022-04-05 04:14:04,049 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) [2022-04-05 04:14:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 627 transitions. [2022-04-05 04:14:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:14:04,052 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:04,053 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] [2022-04-05 04:14:04,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-05 04:14:04,053 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:04,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1674357745, now seen corresponding path program 1 times [2022-04-05 04:14:04,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:04,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811536336] [2022-04-05 04:14:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:04,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:04,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:04,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811536336] [2022-04-05 04:14:04,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811536336] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:04,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:04,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:04,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149838218] [2022-04-05 04:14:04,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:04,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:04,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:04,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:04,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:04,093 INFO L87 Difference]: Start difference. First operand 357 states and 627 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) [2022-04-05 04:14:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:04,166 INFO L93 Difference]: Finished difference Result 667 states and 1184 transitions. [2022-04-05 04:14:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:04,166 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 [2022-04-05 04:14:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:04,169 INFO L225 Difference]: With dead ends: 667 [2022-04-05 04:14:04,169 INFO L226 Difference]: Without dead ends: 667 [2022-04-05 04:14:04,169 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 [2022-04-05 04:14:04,169 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 99 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 [2022-04-05 04:14:04,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 99 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:04,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-04-05 04:14:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 489. [2022-04-05 04:14:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.7402061855670103) internal successors, (844), 485 states have internal predecessors, (844), 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) [2022-04-05 04:14:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 847 transitions. [2022-04-05 04:14:04,181 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 847 transitions. Word has length 28 [2022-04-05 04:14:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:04,181 INFO L478 AbstractCegarLoop]: Abstraction has 489 states and 847 transitions. [2022-04-05 04:14:04,181 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) [2022-04-05 04:14:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 847 transitions. [2022-04-05 04:14:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:14:04,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:04,182 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] [2022-04-05 04:14:04,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-05 04:14:04,182 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:04,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1267299854, now seen corresponding path program 1 times [2022-04-05 04:14:04,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:04,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405152657] [2022-04-05 04:14:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:04,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:04,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405152657] [2022-04-05 04:14:04,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405152657] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:04,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:04,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:04,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443092640] [2022-04-05 04:14:04,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:04,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:04,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:04,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:04,212 INFO L87 Difference]: Start difference. First operand 489 states and 847 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) [2022-04-05 04:14:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:04,301 INFO L93 Difference]: Finished difference Result 691 states and 1192 transitions. [2022-04-05 04:14:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:04,301 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 [2022-04-05 04:14:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:04,304 INFO L225 Difference]: With dead ends: 691 [2022-04-05 04:14:04,304 INFO L226 Difference]: Without dead ends: 691 [2022-04-05 04:14:04,304 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 [2022-04-05 04:14:04,305 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:04,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 133 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-04-05 04:14:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-04-05 04:14:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 685 states have (on average 1.7343065693430657) internal successors, (1188), 685 states have internal predecessors, (1188), 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) [2022-04-05 04:14:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1191 transitions. [2022-04-05 04:14:04,319 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1191 transitions. Word has length 28 [2022-04-05 04:14:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:04,320 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 1191 transitions. [2022-04-05 04:14:04,320 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) [2022-04-05 04:14:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1191 transitions. [2022-04-05 04:14:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 04:14:04,321 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:04,321 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] [2022-04-05 04:14:04,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-05 04:14:04,321 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash 365515008, now seen corresponding path program 1 times [2022-04-05 04:14:04,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:04,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575636734] [2022-04-05 04:14:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:04,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:04,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:04,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575636734] [2022-04-05 04:14:04,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575636734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:04,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:04,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:04,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439265450] [2022-04-05 04:14:04,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:04,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:04,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:04,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:04,350 INFO L87 Difference]: Start difference. First operand 689 states and 1191 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) [2022-04-05 04:14:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:04,426 INFO L93 Difference]: Finished difference Result 699 states and 1192 transitions. [2022-04-05 04:14:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:04,426 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 [2022-04-05 04:14:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:04,429 INFO L225 Difference]: With dead ends: 699 [2022-04-05 04:14:04,429 INFO L226 Difference]: Without dead ends: 699 [2022-04-05 04:14:04,429 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 [2022-04-05 04:14:04,430 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:04,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 144 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:04,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-04-05 04:14:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-04-05 04:14:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 693 states have (on average 1.7142857142857142) internal successors, (1188), 693 states have internal predecessors, (1188), 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) [2022-04-05 04:14:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1191 transitions. [2022-04-05 04:14:04,444 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1191 transitions. Word has length 29 [2022-04-05 04:14:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:04,444 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 1191 transitions. [2022-04-05 04:14:04,444 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) [2022-04-05 04:14:04,445 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1191 transitions. [2022-04-05 04:14:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 04:14:04,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:04,445 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] [2022-04-05 04:14:04,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-05 04:14:04,446 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:04,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:04,446 INFO L85 PathProgramCache]: Analyzing trace with hash -631557345, now seen corresponding path program 1 times [2022-04-05 04:14:04,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:04,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464247557] [2022-04-05 04:14:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:04,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:04,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:04,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464247557] [2022-04-05 04:14:04,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464247557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:04,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:04,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:04,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658988138] [2022-04-05 04:14:04,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:04,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:04,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:04,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:04,500 INFO L87 Difference]: Start difference. First operand 697 states and 1191 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) [2022-04-05 04:14:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:04,573 INFO L93 Difference]: Finished difference Result 1291 states and 2232 transitions. [2022-04-05 04:14:04,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:04,573 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 [2022-04-05 04:14:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:04,577 INFO L225 Difference]: With dead ends: 1291 [2022-04-05 04:14:04,577 INFO L226 Difference]: Without dead ends: 1291 [2022-04-05 04:14:04,578 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 [2022-04-05 04:14:04,578 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 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 [2022-04-05 04:14:04,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:04,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-04-05 04:14:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2022-04-05 04:14:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.6787564766839378) internal successors, (1620), 965 states have internal predecessors, (1620), 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) [2022-04-05 04:14:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1623 transitions. [2022-04-05 04:14:04,597 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1623 transitions. Word has length 29 [2022-04-05 04:14:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:04,598 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1623 transitions. [2022-04-05 04:14:04,598 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) [2022-04-05 04:14:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1623 transitions. [2022-04-05 04:14:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 04:14:04,599 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:04,599 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] [2022-04-05 04:14:04,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-05 04:14:04,599 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:04,600 INFO L85 PathProgramCache]: Analyzing trace with hash 721752352, now seen corresponding path program 1 times [2022-04-05 04:14:04,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:04,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247270617] [2022-04-05 04:14:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:04,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:04,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:04,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247270617] [2022-04-05 04:14:04,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247270617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:04,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:04,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:04,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161984503] [2022-04-05 04:14:04,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:04,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:04,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:04,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:04,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:04,648 INFO L87 Difference]: Start difference. First operand 969 states and 1623 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) [2022-04-05 04:14:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:04,716 INFO L93 Difference]: Finished difference Result 1355 states and 2264 transitions. [2022-04-05 04:14:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:04,717 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 [2022-04-05 04:14:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:04,720 INFO L225 Difference]: With dead ends: 1355 [2022-04-05 04:14:04,720 INFO L226 Difference]: Without dead ends: 1355 [2022-04-05 04:14:04,720 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 [2022-04-05 04:14:04,721 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 135 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 [2022-04-05 04:14:04,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 135 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-04-05 04:14:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2022-04-05 04:14:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 1.67531504818384) internal successors, (2260), 1349 states have internal predecessors, (2260), 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) [2022-04-05 04:14:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2263 transitions. [2022-04-05 04:14:04,740 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2263 transitions. Word has length 29 [2022-04-05 04:14:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:04,740 INFO L478 AbstractCegarLoop]: Abstraction has 1353 states and 2263 transitions. [2022-04-05 04:14:04,740 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) [2022-04-05 04:14:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2263 transitions. [2022-04-05 04:14:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:14:04,741 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:04,741 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] [2022-04-05 04:14:04,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-05 04:14:04,741 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:04,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:04,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1896591374, now seen corresponding path program 1 times [2022-04-05 04:14:04,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:04,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126969536] [2022-04-05 04:14:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:04,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:04,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126969536] [2022-04-05 04:14:04,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126969536] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:04,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:04,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:04,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426151861] [2022-04-05 04:14:04,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:04,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:04,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:04,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:04,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:04,769 INFO L87 Difference]: Start difference. First operand 1353 states and 2263 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) [2022-04-05 04:14:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:04,845 INFO L93 Difference]: Finished difference Result 1371 states and 2264 transitions. [2022-04-05 04:14:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:04,845 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 [2022-04-05 04:14:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:04,848 INFO L225 Difference]: With dead ends: 1371 [2022-04-05 04:14:04,849 INFO L226 Difference]: Without dead ends: 1371 [2022-04-05 04:14:04,850 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 [2022-04-05 04:14:04,851 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 179 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 141 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 [2022-04-05 04:14:04,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 141 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-04-05 04:14:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-04-05 04:14:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1365 states have (on average 1.6556776556776556) internal successors, (2260), 1365 states have internal predecessors, (2260), 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) [2022-04-05 04:14:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2263 transitions. [2022-04-05 04:14:04,888 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2263 transitions. Word has length 30 [2022-04-05 04:14:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:04,888 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 2263 transitions. [2022-04-05 04:14:04,888 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) [2022-04-05 04:14:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2263 transitions. [2022-04-05 04:14:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:14:04,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:04,890 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] [2022-04-05 04:14:04,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-05 04:14:04,890 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:04,890 INFO L85 PathProgramCache]: Analyzing trace with hash 899519021, now seen corresponding path program 1 times [2022-04-05 04:14:04,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:04,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130463856] [2022-04-05 04:14:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:04,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:04,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:04,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130463856] [2022-04-05 04:14:04,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130463856] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:04,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:04,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:04,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083944026] [2022-04-05 04:14:04,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:04,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:04,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:04,921 INFO L87 Difference]: Start difference. First operand 1369 states and 2263 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) [2022-04-05 04:14:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:05,012 INFO L93 Difference]: Finished difference Result 2507 states and 4200 transitions. [2022-04-05 04:14:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:05,012 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 [2022-04-05 04:14:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:05,019 INFO L225 Difference]: With dead ends: 2507 [2022-04-05 04:14:05,019 INFO L226 Difference]: Without dead ends: 2507 [2022-04-05 04:14:05,019 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 [2022-04-05 04:14:05,019 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 201 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 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 [2022-04-05 04:14:05,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-04-05 04:14:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1929. [2022-04-05 04:14:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.6145454545454545) internal successors, (3108), 1925 states have internal predecessors, (3108), 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) [2022-04-05 04:14:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3111 transitions. [2022-04-05 04:14:05,050 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3111 transitions. Word has length 30 [2022-04-05 04:14:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:05,050 INFO L478 AbstractCegarLoop]: Abstraction has 1929 states and 3111 transitions. [2022-04-05 04:14:05,050 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) [2022-04-05 04:14:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3111 transitions. [2022-04-05 04:14:05,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:14:05,051 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:05,051 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] [2022-04-05 04:14:05,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-05 04:14:05,052 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2042138578, now seen corresponding path program 1 times [2022-04-05 04:14:05,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:05,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949192423] [2022-04-05 04:14:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:05,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:05,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:05,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949192423] [2022-04-05 04:14:05,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949192423] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:05,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:05,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:05,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910708538] [2022-04-05 04:14:05,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:05,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:05,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:05,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:05,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:05,088 INFO L87 Difference]: Start difference. First operand 1929 states and 3111 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) [2022-04-05 04:14:05,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:05,160 INFO L93 Difference]: Finished difference Result 2667 states and 4296 transitions. [2022-04-05 04:14:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:05,160 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 [2022-04-05 04:14:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:05,167 INFO L225 Difference]: With dead ends: 2667 [2022-04-05 04:14:05,167 INFO L226 Difference]: Without dead ends: 2667 [2022-04-05 04:14:05,167 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 [2022-04-05 04:14:05,167 INFO L913 BasicCegarLoop]: 130 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 137 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 [2022-04-05 04:14:05,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 137 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-04-05 04:14:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2665. [2022-04-05 04:14:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2661 states have (on average 1.6129274708756107) internal successors, (4292), 2661 states have internal predecessors, (4292), 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) [2022-04-05 04:14:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 4295 transitions. [2022-04-05 04:14:05,204 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 4295 transitions. Word has length 30 [2022-04-05 04:14:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:05,204 INFO L478 AbstractCegarLoop]: Abstraction has 2665 states and 4295 transitions. [2022-04-05 04:14:05,204 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) [2022-04-05 04:14:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 4295 transitions. [2022-04-05 04:14:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 04:14:05,206 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:05,206 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] [2022-04-05 04:14:05,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-05 04:14:05,206 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:05,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2115318588, now seen corresponding path program 1 times [2022-04-05 04:14:05,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:05,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111177757] [2022-04-05 04:14:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:05,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:05,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:05,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:05,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111177757] [2022-04-05 04:14:05,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111177757] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:05,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:05,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:05,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019649757] [2022-04-05 04:14:05,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:05,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:05,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:05,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:05,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:05,233 INFO L87 Difference]: Start difference. First operand 2665 states and 4295 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) [2022-04-05 04:14:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:05,306 INFO L93 Difference]: Finished difference Result 2699 states and 4296 transitions. [2022-04-05 04:14:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:05,307 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 [2022-04-05 04:14:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:05,313 INFO L225 Difference]: With dead ends: 2699 [2022-04-05 04:14:05,313 INFO L226 Difference]: Without dead ends: 2699 [2022-04-05 04:14:05,313 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 [2022-04-05 04:14:05,314 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:05,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 138 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:05,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-04-05 04:14:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2697. [2022-04-05 04:14:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2693 states have (on average 1.5937616041589306) internal successors, (4292), 2693 states have internal predecessors, (4292), 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) [2022-04-05 04:14:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4295 transitions. [2022-04-05 04:14:05,392 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4295 transitions. Word has length 31 [2022-04-05 04:14:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:05,392 INFO L478 AbstractCegarLoop]: Abstraction has 2697 states and 4295 transitions. [2022-04-05 04:14:05,392 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) [2022-04-05 04:14:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4295 transitions. [2022-04-05 04:14:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 04:14:05,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:05,394 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] [2022-04-05 04:14:05,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-05 04:14:05,394 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:05,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1118246235, now seen corresponding path program 1 times [2022-04-05 04:14:05,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:05,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181922454] [2022-04-05 04:14:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:05,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:05,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:05,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:05,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181922454] [2022-04-05 04:14:05,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181922454] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:05,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:05,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:05,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465179636] [2022-04-05 04:14:05,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:05,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:05,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:05,418 INFO L87 Difference]: Start difference. First operand 2697 states and 4295 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) [2022-04-05 04:14:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:05,497 INFO L93 Difference]: Finished difference Result 4875 states and 7880 transitions. [2022-04-05 04:14:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:05,498 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 [2022-04-05 04:14:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:05,510 INFO L225 Difference]: With dead ends: 4875 [2022-04-05 04:14:05,510 INFO L226 Difference]: Without dead ends: 4875 [2022-04-05 04:14:05,510 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 [2022-04-05 04:14:05,511 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:05,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-04-05 04:14:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3849. [2022-04-05 04:14:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3845 states have (on average 1.5490247074122236) internal successors, (5956), 3845 states have internal predecessors, (5956), 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) [2022-04-05 04:14:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 5959 transitions. [2022-04-05 04:14:05,565 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 5959 transitions. Word has length 31 [2022-04-05 04:14:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:05,565 INFO L478 AbstractCegarLoop]: Abstraction has 3849 states and 5959 transitions. [2022-04-05 04:14:05,565 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) [2022-04-05 04:14:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 5959 transitions. [2022-04-05 04:14:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 04:14:05,568 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:05,568 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] [2022-04-05 04:14:05,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-05 04:14:05,568 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1823411364, now seen corresponding path program 1 times [2022-04-05 04:14:05,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:05,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921089919] [2022-04-05 04:14:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:05,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:05,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:05,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921089919] [2022-04-05 04:14:05,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921089919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:05,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:05,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:05,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296179361] [2022-04-05 04:14:05,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:05,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:05,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:05,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:05,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:05,596 INFO L87 Difference]: Start difference. First operand 3849 states and 5959 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) [2022-04-05 04:14:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:05,673 INFO L93 Difference]: Finished difference Result 5259 states and 8136 transitions. [2022-04-05 04:14:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:05,673 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 [2022-04-05 04:14:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:05,696 INFO L225 Difference]: With dead ends: 5259 [2022-04-05 04:14:05,696 INFO L226 Difference]: Without dead ends: 5259 [2022-04-05 04:14:05,696 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 [2022-04-05 04:14:05,697 INFO L913 BasicCegarLoop]: 132 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:05,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 139 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-04-05 04:14:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2022-04-05 04:14:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5253 states have (on average 1.5480677707976394) internal successors, (8132), 5253 states have internal predecessors, (8132), 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) [2022-04-05 04:14:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8135 transitions. [2022-04-05 04:14:05,773 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8135 transitions. Word has length 31 [2022-04-05 04:14:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:05,773 INFO L478 AbstractCegarLoop]: Abstraction has 5257 states and 8135 transitions. [2022-04-05 04:14:05,773 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) [2022-04-05 04:14:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8135 transitions. [2022-04-05 04:14:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 04:14:05,778 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:05,778 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] [2022-04-05 04:14:05,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-05 04:14:05,779 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:05,780 INFO L85 PathProgramCache]: Analyzing trace with hash 305927754, now seen corresponding path program 1 times [2022-04-05 04:14:05,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:05,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631712340] [2022-04-05 04:14:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:05,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:05,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:05,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:05,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631712340] [2022-04-05 04:14:05,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631712340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:05,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:05,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:05,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853655328] [2022-04-05 04:14:05,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:05,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:05,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:05,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:05,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:05,802 INFO L87 Difference]: Start difference. First operand 5257 states and 8135 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) [2022-04-05 04:14:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:05,880 INFO L93 Difference]: Finished difference Result 5323 states and 8136 transitions. [2022-04-05 04:14:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:05,881 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 [2022-04-05 04:14:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:05,890 INFO L225 Difference]: With dead ends: 5323 [2022-04-05 04:14:05,890 INFO L226 Difference]: Without dead ends: 5323 [2022-04-05 04:14:05,890 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 [2022-04-05 04:14:05,892 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:05,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 135 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2022-04-05 04:14:05,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5321. [2022-04-05 04:14:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5321 states, 5317 states have (on average 1.529433891292082) internal successors, (8132), 5317 states have internal predecessors, (8132), 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) [2022-04-05 04:14:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8135 transitions. [2022-04-05 04:14:06,008 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8135 transitions. Word has length 32 [2022-04-05 04:14:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:06,008 INFO L478 AbstractCegarLoop]: Abstraction has 5321 states and 8135 transitions. [2022-04-05 04:14:06,009 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) [2022-04-05 04:14:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8135 transitions. [2022-04-05 04:14:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 04:14:06,013 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:06,013 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] [2022-04-05 04:14:06,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-05 04:14:06,013 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:06,013 INFO L85 PathProgramCache]: Analyzing trace with hash -691144599, now seen corresponding path program 1 times [2022-04-05 04:14:06,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:06,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482183535] [2022-04-05 04:14:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:06,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:06,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:06,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:06,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482183535] [2022-04-05 04:14:06,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482183535] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:06,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:06,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:06,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089408979] [2022-04-05 04:14:06,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:06,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:06,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:06,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:06,042 INFO L87 Difference]: Start difference. First operand 5321 states and 8135 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) [2022-04-05 04:14:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:06,133 INFO L93 Difference]: Finished difference Result 9483 states and 14728 transitions. [2022-04-05 04:14:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:06,134 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 [2022-04-05 04:14:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:06,148 INFO L225 Difference]: With dead ends: 9483 [2022-04-05 04:14:06,148 INFO L226 Difference]: Without dead ends: 9483 [2022-04-05 04:14:06,149 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 [2022-04-05 04:14:06,150 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 95 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 [2022-04-05 04:14:06,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2022-04-05 04:14:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7689. [2022-04-05 04:14:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7685 states have (on average 1.4828887443070917) internal successors, (11396), 7685 states have internal predecessors, (11396), 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) [2022-04-05 04:14:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 11399 transitions. [2022-04-05 04:14:06,258 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 11399 transitions. Word has length 32 [2022-04-05 04:14:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:06,258 INFO L478 AbstractCegarLoop]: Abstraction has 7689 states and 11399 transitions. [2022-04-05 04:14:06,258 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) [2022-04-05 04:14:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 11399 transitions. [2022-04-05 04:14:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 04:14:06,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:06,265 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] [2022-04-05 04:14:06,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-05 04:14:06,265 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:06,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash 662165098, now seen corresponding path program 1 times [2022-04-05 04:14:06,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:06,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893922644] [2022-04-05 04:14:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:06,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:06,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:06,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:06,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893922644] [2022-04-05 04:14:06,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893922644] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:06,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:06,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:06,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059407634] [2022-04-05 04:14:06,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:06,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:06,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:06,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:06,291 INFO L87 Difference]: Start difference. First operand 7689 states and 11399 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) [2022-04-05 04:14:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:06,386 INFO L93 Difference]: Finished difference Result 10379 states and 15368 transitions. [2022-04-05 04:14:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:06,387 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 [2022-04-05 04:14:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:06,400 INFO L225 Difference]: With dead ends: 10379 [2022-04-05 04:14:06,401 INFO L226 Difference]: Without dead ends: 10379 [2022-04-05 04:14:06,401 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 [2022-04-05 04:14:06,402 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:06,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 141 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-04-05 04:14:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2022-04-05 04:14:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 10373 states have (on average 1.4811529933481153) internal successors, (15364), 10373 states have internal predecessors, (15364), 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) [2022-04-05 04:14:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 15367 transitions. [2022-04-05 04:14:06,554 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 15367 transitions. Word has length 32 [2022-04-05 04:14:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:06,555 INFO L478 AbstractCegarLoop]: Abstraction has 10377 states and 15367 transitions. [2022-04-05 04:14:06,555 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) [2022-04-05 04:14:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 15367 transitions. [2022-04-05 04:14:06,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 04:14:06,562 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:06,562 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, 1, 1] [2022-04-05 04:14:06,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-05 04:14:06,562 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:06,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash 49386872, now seen corresponding path program 1 times [2022-04-05 04:14:06,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:06,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868449788] [2022-04-05 04:14:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:06,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:06,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:06,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:06,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868449788] [2022-04-05 04:14:06,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868449788] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:06,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:06,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:06,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72483008] [2022-04-05 04:14:06,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:06,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:06,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:06,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:06,588 INFO L87 Difference]: Start difference. First operand 10377 states and 15367 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) [2022-04-05 04:14:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:06,695 INFO L93 Difference]: Finished difference Result 10507 states and 15368 transitions. [2022-04-05 04:14:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:06,695 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 [2022-04-05 04:14:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:06,711 INFO L225 Difference]: With dead ends: 10507 [2022-04-05 04:14:06,711 INFO L226 Difference]: Without dead ends: 10507 [2022-04-05 04:14:06,711 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 [2022-04-05 04:14:06,712 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:06,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 132 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2022-04-05 04:14:06,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 10505. [2022-04-05 04:14:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10501 states have (on average 1.4630987524997618) internal successors, (15364), 10501 states have internal predecessors, (15364), 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) [2022-04-05 04:14:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 15367 transitions. [2022-04-05 04:14:06,858 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 15367 transitions. Word has length 33 [2022-04-05 04:14:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:06,858 INFO L478 AbstractCegarLoop]: Abstraction has 10505 states and 15367 transitions. [2022-04-05 04:14:06,858 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) [2022-04-05 04:14:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 15367 transitions. [2022-04-05 04:14:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 04:14:06,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:06,865 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] [2022-04-05 04:14:06,865 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-05 04:14:06,865 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:06,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:06,866 INFO L85 PathProgramCache]: Analyzing trace with hash -947685481, now seen corresponding path program 1 times [2022-04-05 04:14:06,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:06,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776687910] [2022-04-05 04:14:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:06,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:06,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:06,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:06,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776687910] [2022-04-05 04:14:06,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776687910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:06,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:06,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:06,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754539580] [2022-04-05 04:14:06,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:06,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:06,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:06,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:06,891 INFO L87 Difference]: Start difference. First operand 10505 states and 15367 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) [2022-04-05 04:14:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:07,013 INFO L93 Difference]: Finished difference Result 18443 states and 27400 transitions. [2022-04-05 04:14:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:07,013 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 [2022-04-05 04:14:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:07,039 INFO L225 Difference]: With dead ends: 18443 [2022-04-05 04:14:07,040 INFO L226 Difference]: Without dead ends: 18443 [2022-04-05 04:14:07,040 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 [2022-04-05 04:14:07,040 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:07,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 94 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18443 states. [2022-04-05 04:14:07,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18443 to 15369. [2022-04-05 04:14:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 15365 states have (on average 1.4164659941425317) internal successors, (21764), 15365 states have internal predecessors, (21764), 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) [2022-04-05 04:14:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 21767 transitions. [2022-04-05 04:14:07,270 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 21767 transitions. Word has length 33 [2022-04-05 04:14:07,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:07,270 INFO L478 AbstractCegarLoop]: Abstraction has 15369 states and 21767 transitions. [2022-04-05 04:14:07,271 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) [2022-04-05 04:14:07,271 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 21767 transitions. [2022-04-05 04:14:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 04:14:07,283 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:07,283 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] [2022-04-05 04:14:07,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-05 04:14:07,283 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:07,284 INFO L85 PathProgramCache]: Analyzing trace with hash 405624216, now seen corresponding path program 1 times [2022-04-05 04:14:07,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:07,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357716959] [2022-04-05 04:14:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:07,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:07,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:07,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:07,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357716959] [2022-04-05 04:14:07,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357716959] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:07,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:07,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:07,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951462642] [2022-04-05 04:14:07,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:07,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:07,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:07,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:07,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:07,309 INFO L87 Difference]: Start difference. First operand 15369 states and 21767 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) [2022-04-05 04:14:07,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:07,414 INFO L93 Difference]: Finished difference Result 20491 states and 28936 transitions. [2022-04-05 04:14:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:07,415 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 [2022-04-05 04:14:07,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:07,442 INFO L225 Difference]: With dead ends: 20491 [2022-04-05 04:14:07,443 INFO L226 Difference]: Without dead ends: 20491 [2022-04-05 04:14:07,443 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 [2022-04-05 04:14:07,443 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:07,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2022-04-05 04:14:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20489. [2022-04-05 04:14:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20485 states have (on average 1.4123505003661216) internal successors, (28932), 20485 states have internal predecessors, (28932), 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) [2022-04-05 04:14:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 28935 transitions. [2022-04-05 04:14:07,739 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 28935 transitions. Word has length 33 [2022-04-05 04:14:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:07,739 INFO L478 AbstractCegarLoop]: Abstraction has 20489 states and 28935 transitions. [2022-04-05 04:14:07,739 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) [2022-04-05 04:14:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 28935 transitions. [2022-04-05 04:14:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 04:14:07,753 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:07,753 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] [2022-04-05 04:14:07,753 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-05 04:14:07,753 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash 686554246, now seen corresponding path program 1 times [2022-04-05 04:14:07,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:07,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070528985] [2022-04-05 04:14:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:07,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:07,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:07,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:07,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070528985] [2022-04-05 04:14:07,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070528985] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:07,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:07,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:07,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787212899] [2022-04-05 04:14:07,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:07,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:07,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:07,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:07,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:07,774 INFO L87 Difference]: Start difference. First operand 20489 states and 28935 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) [2022-04-05 04:14:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:08,020 INFO L93 Difference]: Finished difference Result 20747 states and 28936 transitions. [2022-04-05 04:14:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:08,020 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 [2022-04-05 04:14:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:08,062 INFO L225 Difference]: With dead ends: 20747 [2022-04-05 04:14:08,062 INFO L226 Difference]: Without dead ends: 20747 [2022-04-05 04:14:08,063 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 [2022-04-05 04:14:08,063 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:08,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 129 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2022-04-05 04:14:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20745. [2022-04-05 04:14:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20745 states, 20741 states have (on average 1.3949182778072418) internal successors, (28932), 20741 states have internal predecessors, (28932), 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) [2022-04-05 04:14:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20745 states to 20745 states and 28935 transitions. [2022-04-05 04:14:08,314 INFO L78 Accepts]: Start accepts. Automaton has 20745 states and 28935 transitions. Word has length 34 [2022-04-05 04:14:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:08,314 INFO L478 AbstractCegarLoop]: Abstraction has 20745 states and 28935 transitions. [2022-04-05 04:14:08,314 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) [2022-04-05 04:14:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand 20745 states and 28935 transitions. [2022-04-05 04:14:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 04:14:08,327 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:08,327 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] [2022-04-05 04:14:08,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-05 04:14:08,328 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:08,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash -310518107, now seen corresponding path program 1 times [2022-04-05 04:14:08,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:08,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037454845] [2022-04-05 04:14:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:08,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:08,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:08,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:08,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037454845] [2022-04-05 04:14:08,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037454845] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:08,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:08,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838531979] [2022-04-05 04:14:08,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:08,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:08,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:08,348 INFO L87 Difference]: Start difference. First operand 20745 states and 28935 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) [2022-04-05 04:14:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:08,479 INFO L93 Difference]: Finished difference Result 35851 states and 50696 transitions. [2022-04-05 04:14:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:08,479 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 [2022-04-05 04:14:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:08,540 INFO L225 Difference]: With dead ends: 35851 [2022-04-05 04:14:08,540 INFO L226 Difference]: Without dead ends: 35851 [2022-04-05 04:14:08,540 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 [2022-04-05 04:14:08,541 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:08,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 93 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35851 states. [2022-04-05 04:14:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35851 to 30729. [2022-04-05 04:14:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30729 states, 30725 states have (on average 1.3499104963384865) internal successors, (41476), 30725 states have internal predecessors, (41476), 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) [2022-04-05 04:14:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30729 states to 30729 states and 41479 transitions. [2022-04-05 04:14:09,137 INFO L78 Accepts]: Start accepts. Automaton has 30729 states and 41479 transitions. Word has length 34 [2022-04-05 04:14:09,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:09,137 INFO L478 AbstractCegarLoop]: Abstraction has 30729 states and 41479 transitions. [2022-04-05 04:14:09,137 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) [2022-04-05 04:14:09,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30729 states and 41479 transitions. [2022-04-05 04:14:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 04:14:09,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:09,200 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] [2022-04-05 04:14:09,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-05 04:14:09,201 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:09,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1042791590, now seen corresponding path program 1 times [2022-04-05 04:14:09,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:09,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927546503] [2022-04-05 04:14:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:09,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:09,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:09,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927546503] [2022-04-05 04:14:09,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927546503] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:09,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:09,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:09,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73379829] [2022-04-05 04:14:09,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:09,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:09,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:09,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:09,255 INFO L87 Difference]: Start difference. First operand 30729 states and 41479 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) [2022-04-05 04:14:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:09,408 INFO L93 Difference]: Finished difference Result 40459 states and 54280 transitions. [2022-04-05 04:14:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:09,408 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 [2022-04-05 04:14:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:09,464 INFO L225 Difference]: With dead ends: 40459 [2022-04-05 04:14:09,464 INFO L226 Difference]: Without dead ends: 40459 [2022-04-05 04:14:09,465 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 [2022-04-05 04:14:09,465 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:09,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 145 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2022-04-05 04:14:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40457. [2022-04-05 04:14:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3417051887375473) internal successors, (54276), 40453 states have internal predecessors, (54276), 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) [2022-04-05 04:14:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 54279 transitions. [2022-04-05 04:14:10,212 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 54279 transitions. Word has length 34 [2022-04-05 04:14:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:10,212 INFO L478 AbstractCegarLoop]: Abstraction has 40457 states and 54279 transitions. [2022-04-05 04:14:10,212 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) [2022-04-05 04:14:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 54279 transitions. [2022-04-05 04:14:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 04:14:10,286 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:10,286 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] [2022-04-05 04:14:10,286 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-05 04:14:10,286 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:10,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1036093516, now seen corresponding path program 1 times [2022-04-05 04:14:10,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:10,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278486559] [2022-04-05 04:14:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:10,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:10,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:10,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:10,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278486559] [2022-04-05 04:14:10,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278486559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:10,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:10,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:10,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581193470] [2022-04-05 04:14:10,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:10,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:10,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:10,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:10,308 INFO L87 Difference]: Start difference. First operand 40457 states and 54279 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) [2022-04-05 04:14:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:10,567 INFO L93 Difference]: Finished difference Result 40971 states and 54280 transitions. [2022-04-05 04:14:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:10,567 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 [2022-04-05 04:14:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:10,611 INFO L225 Difference]: With dead ends: 40971 [2022-04-05 04:14:10,611 INFO L226 Difference]: Without dead ends: 40971 [2022-04-05 04:14:10,611 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 [2022-04-05 04:14:10,612 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:10,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 126 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40971 states. [2022-04-05 04:14:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40971 to 40969. [2022-04-05 04:14:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40969 states, 40965 states have (on average 1.3249359209080922) internal successors, (54276), 40965 states have internal predecessors, (54276), 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) [2022-04-05 04:14:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40969 states to 40969 states and 54279 transitions. [2022-04-05 04:14:11,177 INFO L78 Accepts]: Start accepts. Automaton has 40969 states and 54279 transitions. Word has length 35 [2022-04-05 04:14:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:11,177 INFO L478 AbstractCegarLoop]: Abstraction has 40969 states and 54279 transitions. [2022-04-05 04:14:11,177 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) [2022-04-05 04:14:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 40969 states and 54279 transitions. [2022-04-05 04:14:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 04:14:11,198 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:11,198 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] [2022-04-05 04:14:11,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-05 04:14:11,199 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2033165869, now seen corresponding path program 1 times [2022-04-05 04:14:11,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:11,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765061102] [2022-04-05 04:14:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:11,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:11,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:11,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:11,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765061102] [2022-04-05 04:14:11,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765061102] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:11,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:11,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:11,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443245769] [2022-04-05 04:14:11,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:11,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:11,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:11,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:11,222 INFO L87 Difference]: Start difference. First operand 40969 states and 54279 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) [2022-04-05 04:14:11,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:11,500 INFO L93 Difference]: Finished difference Result 69643 states and 93192 transitions. [2022-04-05 04:14:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:11,501 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 [2022-04-05 04:14:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:11,593 INFO L225 Difference]: With dead ends: 69643 [2022-04-05 04:14:11,594 INFO L226 Difference]: Without dead ends: 69643 [2022-04-05 04:14:11,594 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 [2022-04-05 04:14:11,594 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:11,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69643 states. [2022-04-05 04:14:12,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69643 to 61449. [2022-04-05 04:14:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61449 states, 61445 states have (on average 1.283294002766702) internal successors, (78852), 61445 states have internal predecessors, (78852), 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) [2022-04-05 04:14:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61449 states to 61449 states and 78855 transitions. [2022-04-05 04:14:12,337 INFO L78 Accepts]: Start accepts. Automaton has 61449 states and 78855 transitions. Word has length 35 [2022-04-05 04:14:12,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:12,337 INFO L478 AbstractCegarLoop]: Abstraction has 61449 states and 78855 transitions. [2022-04-05 04:14:12,337 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) [2022-04-05 04:14:12,337 INFO L276 IsEmpty]: Start isEmpty. Operand 61449 states and 78855 transitions. [2022-04-05 04:14:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 04:14:12,383 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:12,383 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] [2022-04-05 04:14:12,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-05 04:14:12,384 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash -679856172, now seen corresponding path program 1 times [2022-04-05 04:14:12,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:12,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122645952] [2022-04-05 04:14:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:12,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:12,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:12,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:12,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122645952] [2022-04-05 04:14:12,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122645952] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:12,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:12,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:12,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866309669] [2022-04-05 04:14:12,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:12,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:12,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:12,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:12,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:12,406 INFO L87 Difference]: Start difference. First operand 61449 states and 78855 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) [2022-04-05 04:14:12,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:12,807 INFO L93 Difference]: Finished difference Result 79883 states and 101384 transitions. [2022-04-05 04:14:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:12,808 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 [2022-04-05 04:14:12,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:12,896 INFO L225 Difference]: With dead ends: 79883 [2022-04-05 04:14:12,897 INFO L226 Difference]: Without dead ends: 79883 [2022-04-05 04:14:12,897 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 [2022-04-05 04:14:12,897 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:12,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79883 states. [2022-04-05 04:14:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79883 to 79881. [2022-04-05 04:14:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79881 states, 79877 states have (on average 1.2692013971481153) internal successors, (101380), 79877 states have internal predecessors, (101380), 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) [2022-04-05 04:14:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79881 states to 79881 states and 101383 transitions. [2022-04-05 04:14:13,778 INFO L78 Accepts]: Start accepts. Automaton has 79881 states and 101383 transitions. Word has length 35 [2022-04-05 04:14:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:13,778 INFO L478 AbstractCegarLoop]: Abstraction has 79881 states and 101383 transitions. [2022-04-05 04:14:13,778 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) [2022-04-05 04:14:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 79881 states and 101383 transitions. [2022-04-05 04:14:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 04:14:13,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:13,822 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] [2022-04-05 04:14:13,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-05 04:14:13,822 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1396400834, now seen corresponding path program 1 times [2022-04-05 04:14:13,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:13,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785908551] [2022-04-05 04:14:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:13,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:13,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785908551] [2022-04-05 04:14:13,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785908551] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:13,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:13,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:13,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736570302] [2022-04-05 04:14:13,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:13,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:13,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:13,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:13,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:13,843 INFO L87 Difference]: Start difference. First operand 79881 states and 101383 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) [2022-04-05 04:14:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:14,395 INFO L93 Difference]: Finished difference Result 80907 states and 101384 transitions. [2022-04-05 04:14:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:14,396 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 [2022-04-05 04:14:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:14,496 INFO L225 Difference]: With dead ends: 80907 [2022-04-05 04:14:14,496 INFO L226 Difference]: Without dead ends: 80907 [2022-04-05 04:14:14,496 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 [2022-04-05 04:14:14,496 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:14,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 123 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 04:14:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80907 states. [2022-04-05 04:14:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80907 to 80905. [2022-04-05 04:14:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80905 states, 80901 states have (on average 1.253136549610017) internal successors, (101380), 80901 states have internal predecessors, (101380), 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) [2022-04-05 04:14:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80905 states to 80905 states and 101383 transitions. [2022-04-05 04:14:15,369 INFO L78 Accepts]: Start accepts. Automaton has 80905 states and 101383 transitions. Word has length 36 [2022-04-05 04:14:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:15,369 INFO L478 AbstractCegarLoop]: Abstraction has 80905 states and 101383 transitions. [2022-04-05 04:14:15,369 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) [2022-04-05 04:14:15,369 INFO L276 IsEmpty]: Start isEmpty. Operand 80905 states and 101383 transitions. [2022-04-05 04:14:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 04:14:15,404 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:15,404 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] [2022-04-05 04:14:15,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-05 04:14:15,404 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:15,405 INFO L85 PathProgramCache]: Analyzing trace with hash 399328481, now seen corresponding path program 1 times [2022-04-05 04:14:15,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:15,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342179424] [2022-04-05 04:14:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:15,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:15,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:15,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:15,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342179424] [2022-04-05 04:14:15,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342179424] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:15,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:15,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:15,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470556736] [2022-04-05 04:14:15,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:15,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:15,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:15,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:15,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:15,426 INFO L87 Difference]: Start difference. First operand 80905 states and 101383 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) [2022-04-05 04:14:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:15,972 INFO L93 Difference]: Finished difference Result 135179 states and 169992 transitions. [2022-04-05 04:14:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:15,973 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 [2022-04-05 04:14:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:16,189 INFO L225 Difference]: With dead ends: 135179 [2022-04-05 04:14:16,190 INFO L226 Difference]: Without dead ends: 135179 [2022-04-05 04:14:16,190 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 [2022-04-05 04:14:16,191 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:16,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:16,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-04-05 04:14:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 122889. [2022-04-05 04:14:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122889 states, 122885 states have (on average 1.2166497131464378) internal successors, (149508), 122885 states have internal predecessors, (149508), 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) [2022-04-05 04:14:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122889 states to 122889 states and 149511 transitions. [2022-04-05 04:14:17,930 INFO L78 Accepts]: Start accepts. Automaton has 122889 states and 149511 transitions. Word has length 36 [2022-04-05 04:14:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:17,931 INFO L478 AbstractCegarLoop]: Abstraction has 122889 states and 149511 transitions. [2022-04-05 04:14:17,931 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) [2022-04-05 04:14:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 122889 states and 149511 transitions. [2022-04-05 04:14:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 04:14:18,012 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:18,013 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] [2022-04-05 04:14:18,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-05 04:14:18,013 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:18,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1752638178, now seen corresponding path program 1 times [2022-04-05 04:14:18,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:18,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125554876] [2022-04-05 04:14:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:18,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:18,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:18,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:18,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125554876] [2022-04-05 04:14:18,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125554876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:18,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:18,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:18,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621297517] [2022-04-05 04:14:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:18,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:18,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:18,066 INFO L87 Difference]: Start difference. First operand 122889 states and 149511 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) [2022-04-05 04:14:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:18,809 INFO L93 Difference]: Finished difference Result 157707 states and 188424 transitions. [2022-04-05 04:14:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:18,810 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 [2022-04-05 04:14:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:19,028 INFO L225 Difference]: With dead ends: 157707 [2022-04-05 04:14:19,028 INFO L226 Difference]: Without dead ends: 157707 [2022-04-05 04:14:19,028 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 [2022-04-05 04:14:19,029 INFO L913 BasicCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:19,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 149 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157707 states. [2022-04-05 04:14:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157707 to 157705. [2022-04-05 04:14:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157705 states, 157701 states have (on average 1.1947926772816913) internal successors, (188420), 157701 states have internal predecessors, (188420), 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) [2022-04-05 04:14:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157705 states to 157705 states and 188423 transitions. [2022-04-05 04:14:21,445 INFO L78 Accepts]: Start accepts. Automaton has 157705 states and 188423 transitions. Word has length 36 [2022-04-05 04:14:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:21,445 INFO L478 AbstractCegarLoop]: Abstraction has 157705 states and 188423 transitions. [2022-04-05 04:14:21,445 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) [2022-04-05 04:14:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 157705 states and 188423 transitions. [2022-04-05 04:14:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 04:14:21,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:21,555 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] [2022-04-05 04:14:21,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-05 04:14:21,555 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash -505685520, now seen corresponding path program 1 times [2022-04-05 04:14:21,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:21,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015999256] [2022-04-05 04:14:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:21,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:21,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:21,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015999256] [2022-04-05 04:14:21,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015999256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:21,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:21,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:21,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616741219] [2022-04-05 04:14:21,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:21,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:21,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:21,576 INFO L87 Difference]: Start difference. First operand 157705 states and 188423 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) [2022-04-05 04:14:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:22,405 INFO L93 Difference]: Finished difference Result 159755 states and 188424 transitions. [2022-04-05 04:14:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:22,406 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 [2022-04-05 04:14:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:22,683 INFO L225 Difference]: With dead ends: 159755 [2022-04-05 04:14:22,683 INFO L226 Difference]: Without dead ends: 159755 [2022-04-05 04:14:22,683 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 [2022-04-05 04:14:22,684 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:22,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159755 states. [2022-04-05 04:14:24,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159755 to 159753. [2022-04-05 04:14:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159753 states, 159749 states have (on average 1.179475301879824) internal successors, (188420), 159749 states have internal predecessors, (188420), 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) [2022-04-05 04:14:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159753 states to 159753 states and 188423 transitions. [2022-04-05 04:14:24,774 INFO L78 Accepts]: Start accepts. Automaton has 159753 states and 188423 transitions. Word has length 37 [2022-04-05 04:14:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:24,775 INFO L478 AbstractCegarLoop]: Abstraction has 159753 states and 188423 transitions. [2022-04-05 04:14:24,775 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) [2022-04-05 04:14:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 159753 states and 188423 transitions. [2022-04-05 04:14:24,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 04:14:24,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:24,903 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] [2022-04-05 04:14:24,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-05 04:14:24,903 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1502757873, now seen corresponding path program 1 times [2022-04-05 04:14:24,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:24,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824965897] [2022-04-05 04:14:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:24,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:24,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:24,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824965897] [2022-04-05 04:14:24,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824965897] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:24,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:24,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:24,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503193938] [2022-04-05 04:14:24,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:24,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:24,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:24,936 INFO L87 Difference]: Start difference. First operand 159753 states and 188423 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) [2022-04-05 04:14:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:25,840 INFO L93 Difference]: Finished difference Result 262155 states and 307208 transitions. [2022-04-05 04:14:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:25,841 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 [2022-04-05 04:14:25,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:26,251 INFO L225 Difference]: With dead ends: 262155 [2022-04-05 04:14:26,252 INFO L226 Difference]: Without dead ends: 262155 [2022-04-05 04:14:26,252 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 [2022-04-05 04:14:26,252 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:26,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:26,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262155 states. [2022-04-05 04:14:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262155 to 245769. [2022-04-05 04:14:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245769 states, 245765 states have (on average 1.1499928793766403) internal successors, (282628), 245765 states have internal predecessors, (282628), 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) [2022-04-05 04:14:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245769 states to 245769 states and 282631 transitions. [2022-04-05 04:14:29,878 INFO L78 Accepts]: Start accepts. Automaton has 245769 states and 282631 transitions. Word has length 37 [2022-04-05 04:14:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:29,878 INFO L478 AbstractCegarLoop]: Abstraction has 245769 states and 282631 transitions. [2022-04-05 04:14:29,878 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) [2022-04-05 04:14:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 245769 states and 282631 transitions. [2022-04-05 04:14:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 04:14:30,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:30,346 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] [2022-04-05 04:14:30,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-04-05 04:14:30,347 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:30,347 INFO L85 PathProgramCache]: Analyzing trace with hash -149448176, now seen corresponding path program 1 times [2022-04-05 04:14:30,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:30,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253434269] [2022-04-05 04:14:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:30,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:30,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:30,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:30,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253434269] [2022-04-05 04:14:30,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253434269] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:30,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:30,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:30,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338546686] [2022-04-05 04:14:30,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:30,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:30,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:30,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:30,366 INFO L87 Difference]: Start difference. First operand 245769 states and 282631 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) [2022-04-05 04:14:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:31,470 INFO L93 Difference]: Finished difference Result 311307 states and 348168 transitions. [2022-04-05 04:14:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:31,470 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 [2022-04-05 04:14:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:31,941 INFO L225 Difference]: With dead ends: 311307 [2022-04-05 04:14:31,942 INFO L226 Difference]: Without dead ends: 311307 [2022-04-05 04:14:31,942 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 [2022-04-05 04:14:31,942 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:31,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 151 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311307 states. [2022-04-05 04:14:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311307 to 311305. [2022-04-05 04:14:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311305 states, 311301 states have (on average 1.1184159382719618) internal successors, (348164), 311301 states have internal predecessors, (348164), 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) [2022-04-05 04:14:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311305 states to 311305 states and 348167 transitions. [2022-04-05 04:14:35,727 INFO L78 Accepts]: Start accepts. Automaton has 311305 states and 348167 transitions. Word has length 37 [2022-04-05 04:14:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:35,727 INFO L478 AbstractCegarLoop]: Abstraction has 311305 states and 348167 transitions. [2022-04-05 04:14:35,728 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) [2022-04-05 04:14:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 311305 states and 348167 transitions. [2022-04-05 04:14:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 04:14:35,954 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:35,954 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, 1] [2022-04-05 04:14:35,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-04-05 04:14:35,961 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:35,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:35,979 INFO L85 PathProgramCache]: Analyzing trace with hash 659179774, now seen corresponding path program 1 times [2022-04-05 04:14:35,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:35,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384417325] [2022-04-05 04:14:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:35,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:35,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:36,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:36,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384417325] [2022-04-05 04:14:36,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384417325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:36,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:36,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:36,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789263398] [2022-04-05 04:14:36,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:36,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:36,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:36,014 INFO L87 Difference]: Start difference. First operand 311305 states and 348167 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-04-05 04:14:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:37,309 INFO L93 Difference]: Finished difference Result 315403 states and 348168 transitions. [2022-04-05 04:14:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:37,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2022-04-05 04:14:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:37,796 INFO L225 Difference]: With dead ends: 315403 [2022-04-05 04:14:37,797 INFO L226 Difference]: Without dead ends: 315403 [2022-04-05 04:14:37,797 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 [2022-04-05 04:14:37,797 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 171 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:37,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 117 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 04:14:38,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315403 states. [2022-04-05 04:14:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315403 to 315401. [2022-04-05 04:14:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315401 states, 315397 states have (on average 1.1038912862202241) internal successors, (348164), 315397 states have internal predecessors, (348164), 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) [2022-04-05 04:14:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315401 states to 315401 states and 348167 transitions. [2022-04-05 04:14:41,581 INFO L78 Accepts]: Start accepts. Automaton has 315401 states and 348167 transitions. Word has length 38 [2022-04-05 04:14:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:41,581 INFO L478 AbstractCegarLoop]: Abstraction has 315401 states and 348167 transitions. [2022-04-05 04:14:41,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-04-05 04:14:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 315401 states and 348167 transitions. [2022-04-05 04:14:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 04:14:42,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:42,140 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, 1] [2022-04-05 04:14:42,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-04-05 04:14:42,140 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash -337892579, now seen corresponding path program 1 times [2022-04-05 04:14:42,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:42,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526930302] [2022-04-05 04:14:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:42,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:42,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:42,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:42,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526930302] [2022-04-05 04:14:42,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526930302] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:42,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:42,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:42,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501537794] [2022-04-05 04:14:42,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:42,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:42,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:42,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:42,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:42,161 INFO L87 Difference]: Start difference. First operand 315401 states and 348167 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-04-05 04:14:43,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:43,404 INFO L93 Difference]: Finished difference Result 507913 states and 548871 transitions. [2022-04-05 04:14:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:43,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2022-04-05 04:14:43,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:44,484 INFO L225 Difference]: With dead ends: 507913 [2022-04-05 04:14:44,484 INFO L226 Difference]: Without dead ends: 507913 [2022-04-05 04:14:44,484 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 [2022-04-05 04:14:44,485 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 144 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:44,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 88 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507913 states. [2022-04-05 04:14:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507913 to 491529. [2022-04-05 04:14:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491529 states, 491525 states have (on average 1.0833304511469406) internal successors, (532484), 491525 states have internal predecessors, (532484), 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) [2022-04-05 04:14:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491529 states to 491529 states and 532487 transitions. [2022-04-05 04:14:50,302 INFO L78 Accepts]: Start accepts. Automaton has 491529 states and 532487 transitions. Word has length 38 [2022-04-05 04:14:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:50,303 INFO L478 AbstractCegarLoop]: Abstraction has 491529 states and 532487 transitions. [2022-04-05 04:14:50,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-04-05 04:14:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 491529 states and 532487 transitions. [2022-04-05 04:14:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 04:14:51,035 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:14:51,035 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:14:51,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-04-05 04:14:51,035 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:14:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:14:51,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1015417118, now seen corresponding path program 1 times [2022-04-05 04:14:51,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:14:51,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778592775] [2022-04-05 04:14:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:14:51,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:14:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:51,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:14:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:14:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:14:51,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:14:51,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778592775] [2022-04-05 04:14:51,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778592775] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:14:51,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:14:51,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:14:51,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458953043] [2022-04-05 04:14:51,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:14:51,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:14:51,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:14:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:14:51,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:14:51,055 INFO L87 Difference]: Start difference. First operand 491529 states and 532487 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-04-05 04:14:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:14:53,194 INFO L93 Difference]: Finished difference Result 614407 states and 638982 transitions. [2022-04-05 04:14:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:14:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2022-04-05 04:14:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:14:53,196 INFO L225 Difference]: With dead ends: 614407 [2022-04-05 04:14:53,196 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 04:14:53,197 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 [2022-04-05 04:14:53,197 INFO L913 BasicCegarLoop]: 145 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:14:53,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 152 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:14:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 04:14:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 04:14:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 04:14:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 04:14:53,199 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2022-04-05 04:14:53,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:14:53,199 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 04:14:53,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-04-05 04:14:53,199 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 04:14:53,200 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 04:14:53,205 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 04:14:53,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-04-05 04:14:53,230 INFO L719 BasicCegarLoop]: Path program 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, 1, 1, 1, 1] [2022-04-05 04:14:53,231 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 04:14:53,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 04:14:53 BasicIcfg [2022-04-05 04:14:53,233 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 04:14:53,233 INFO L158 Benchmark]: Toolchain (without parser) took 51804.92ms. Allocated memory was 222.3MB in the beginning and 8.0GB in the end (delta: 7.7GB). Free memory was 167.0MB in the beginning and 6.5GB in the end (delta: -6.4GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-04-05 04:14:53,233 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 222.3MB. Free memory is still 183.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 04:14:53,233 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.63ms. Allocated memory was 222.3MB in the beginning and 297.8MB in the end (delta: 75.5MB). Free memory was 166.7MB in the beginning and 269.3MB in the end (delta: -102.6MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. [2022-04-05 04:14:53,233 INFO L158 Benchmark]: Boogie Preprocessor took 37.66ms. Allocated memory is still 297.8MB. Free memory was 269.3MB in the beginning and 267.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 04:14:53,233 INFO L158 Benchmark]: RCFGBuilder took 362.84ms. Allocated memory is still 297.8MB. Free memory was 267.3MB in the beginning and 253.6MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-04-05 04:14:53,234 INFO L158 Benchmark]: IcfgTransformer took 34.79ms. Allocated memory is still 297.8MB. Free memory was 253.6MB in the beginning and 251.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 04:14:53,234 INFO L158 Benchmark]: TraceAbstraction took 51128.97ms. Allocated memory was 297.8MB in the beginning and 8.0GB in the end (delta: 7.7GB). Free memory was 251.0MB in the beginning and 6.5GB in the end (delta: -6.3GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-04-05 04:14:53,234 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 222.3MB. Free memory is still 183.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 228.63ms. Allocated memory was 222.3MB in the beginning and 297.8MB in the end (delta: 75.5MB). Free memory was 166.7MB in the beginning and 269.3MB in the end (delta: -102.6MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.66ms. Allocated memory is still 297.8MB. Free memory was 269.3MB in the beginning and 267.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 362.84ms. Allocated memory is still 297.8MB. Free memory was 267.3MB in the beginning and 253.6MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 34.79ms. Allocated memory is still 297.8MB. Free memory was 253.6MB in the beginning and 251.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 51128.97ms. Allocated memory was 297.8MB in the beginning and 8.0GB in the end (delta: 7.7GB). Free memory was 251.0MB in the beginning and 6.5GB in the end (delta: -6.3GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 219]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 51.1s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 2.7s, AutomataDifference: 17.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7336 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7336 mSDsluCounter, 5061 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 289 mSDsCounter, 96 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3369 IncrementalHoareTripleChecker+Invalid, 3465 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 96 mSolverCounterUnsat, 4772 mSDtfsCounter, 3369 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 287 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=491529occurred in iteration=40, InterpolantAutomatonStates: 164, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 29.4s AutomataMinimizationTime, 41 MinimizatonAttempts, 65582 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 1298 NumberOfCodeBlocks, 1298 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1257 ConstructedInterpolants, 0 QuantifiedInterpolants, 2861 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 41 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-05 04:14:53,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...