/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 21:04:22,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 21:04:22,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 21:04:22,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 21:04:22,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 21:04:22,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 21:04:22,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 21:04:22,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 21:04:22,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 21:04:22,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 21:04:22,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 21:04:22,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 21:04:22,383 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 21:04:22,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 21:04:22,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 21:04:22,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 21:04:22,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 21:04:22,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 21:04:22,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 21:04:22,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 21:04:22,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 21:04:22,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 21:04:22,401 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 21:04:22,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 21:04:22,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 21:04:22,403 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 21:04:22,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 21:04:22,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 21:04:22,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 21:04:22,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 21:04:22,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 21:04:22,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 21:04:22,403 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 21:04:22,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 21:04:22,404 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 21:04:22,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 21:04:22,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 21:04:22,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 21:04:22,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 21:04:22,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 21:04:22,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:04:22,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 21:04:22,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 21:04:22,405 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 21:04:22,406 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 21:04:22,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 21:04:22,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 21:04:22,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 21:04:22,596 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 21:04:22,597 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 21:04:22,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2022-03-18 21:04:22,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e02ef29/814267edcf40441a9df5980896968277/FLAG71059ba18 [2022-03-18 21:04:23,002 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 21:04:23,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2022-03-18 21:04:23,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e02ef29/814267edcf40441a9df5980896968277/FLAG71059ba18 [2022-03-18 21:04:23,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e02ef29/814267edcf40441a9df5980896968277 [2022-03-18 21:04:23,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 21:04:23,404 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 21:04:23,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 21:04:23,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 21:04:23,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 21:04:23,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:04:23" (1/1) ... [2022-03-18 21:04:23,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4887b25f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23, skipping insertion in model container [2022-03-18 21:04:23,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:04:23" (1/1) ... [2022-03-18 21:04:23,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 21:04:23,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 21:04:23,653 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_10.c[3901,3914] [2022-03-18 21:04:23,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:04:23,663 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 21:04:23,681 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_10.c[3901,3914] [2022-03-18 21:04:23,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:04:23,690 INFO L208 MainTranslator]: Completed translation [2022-03-18 21:04:23,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23 WrapperNode [2022-03-18 21:04:23,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 21:04:23,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 21:04:23,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 21:04:23,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 21:04:23,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23" (1/1) ... [2022-03-18 21:04:23,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23" (1/1) ... [2022-03-18 21:04:23,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23" (1/1) ... [2022-03-18 21:04:23,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23" (1/1) ... [2022-03-18 21:04:23,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23" (1/1) ... [2022-03-18 21:04:23,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23" (1/1) ... [2022-03-18 21:04:23,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23" (1/1) ... [2022-03-18 21:04:23,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 21:04:23,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 21:04:23,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 21:04:23,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 21:04:23,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23" (1/1) ... [2022-03-18 21:04:23,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:04:23,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:04:23,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 21:04:23,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 21:04:23,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 21:04:23,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 21:04:23,780 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 21:04:23,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 21:04:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 21:04:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 21:04:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 21:04:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 21:04:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 21:04:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 21:04:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 21:04:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 21:04:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 21:04:23,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 21:04:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 21:04:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 21:04:23,844 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 21:04:23,845 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 21:04:24,037 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 21:04:24,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 21:04:24,041 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 21:04:24,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:04:24 BoogieIcfgContainer [2022-03-18 21:04:24,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 21:04:24,043 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 21:04:24,043 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 21:04:24,049 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 21:04:24,050 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:04:24" (1/1) ... [2022-03-18 21:04:24,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:04:24 BasicIcfg [2022-03-18 21:04:24,069 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 21:04:24,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 21:04:24,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 21:04:24,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 21:04:24,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 09:04:23" (1/4) ... [2022-03-18 21:04:24,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c366174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:04:24, skipping insertion in model container [2022-03-18 21:04:24,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:04:23" (2/4) ... [2022-03-18 21:04:24,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c366174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:04:24, skipping insertion in model container [2022-03-18 21:04:24,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:04:24" (3/4) ... [2022-03-18 21:04:24,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c366174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:04:24, skipping insertion in model container [2022-03-18 21:04:24,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:04:24" (4/4) ... [2022-03-18 21:04:24,081 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.cJordan [2022-03-18 21:04:24,085 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 21:04:24,085 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 21:04:24,123 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 21:04:24,130 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 [2022-03-18 21:04:24,131 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 21:04:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 21:04:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 21:04:24,155 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:24,156 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:24,157 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash -666508425, now seen corresponding path program 1 times [2022-03-18 21:04:24,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:24,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636905983] [2022-03-18 21:04:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:24,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:24,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:24,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636905983] [2022-03-18 21:04:24,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636905983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:24,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:24,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:24,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188796607] [2022-03-18 21:04:24,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:24,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:24,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:24,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:24,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:24,384 INFO L87 Difference]: Start difference. First operand has 45 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 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 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:24,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:24,531 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2022-03-18 21:04:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2022-03-18 21:04:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:24,538 INFO L225 Difference]: With dead ends: 81 [2022-03-18 21:04:24,539 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 21:04:24,540 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:24,542 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 174 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:24,542 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 89 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 21:04:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2022-03-18 21:04:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 90 transitions. [2022-03-18 21:04:24,565 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 90 transitions. Word has length 21 [2022-03-18 21:04:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:24,565 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 90 transitions. [2022-03-18 21:04:24,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 90 transitions. [2022-03-18 21:04:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 21:04:24,566 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:24,566 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:24,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 21:04:24,567 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash -959911432, now seen corresponding path program 1 times [2022-03-18 21:04:24,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:24,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740361426] [2022-03-18 21:04:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:24,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:24,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740361426] [2022-03-18 21:04:24,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740361426] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:24,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:24,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:24,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138296353] [2022-03-18 21:04:24,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:24,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:24,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:24,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:24,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:24,629 INFO L87 Difference]: Start difference. First operand 51 states and 90 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:24,781 INFO L93 Difference]: Finished difference Result 73 states and 127 transitions. [2022-03-18 21:04:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:24,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2022-03-18 21:04:24,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:24,783 INFO L225 Difference]: With dead ends: 73 [2022-03-18 21:04:24,783 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 21:04:24,783 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:24,784 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:24,785 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 95 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 21:04:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-03-18 21:04:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.835820895522388) internal successors, (123), 67 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 126 transitions. [2022-03-18 21:04:24,793 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 126 transitions. Word has length 21 [2022-03-18 21:04:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:24,793 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 126 transitions. [2022-03-18 21:04:24,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2022-03-18 21:04:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 21:04:24,794 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:24,794 INFO L500 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] [2022-03-18 21:04:24,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 21:04:24,794 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:24,802 INFO L85 PathProgramCache]: Analyzing trace with hash 813107322, now seen corresponding path program 1 times [2022-03-18 21:04:24,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:24,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963676595] [2022-03-18 21:04:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:24,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:24,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:24,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:24,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963676595] [2022-03-18 21:04:24,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963676595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:24,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:24,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:24,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768078194] [2022-03-18 21:04:24,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:24,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:24,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:24,890 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:24,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:24,989 INFO L93 Difference]: Finished difference Result 76 states and 129 transitions. [2022-03-18 21:04:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:24,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2022-03-18 21:04:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:24,991 INFO L225 Difference]: With dead ends: 76 [2022-03-18 21:04:24,991 INFO L226 Difference]: Without dead ends: 76 [2022-03-18 21:04:24,991 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:24,992 INFO L912 BasicCegarLoop]: 106 mSDtfsCounter, 131 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:24,992 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 113 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-18 21:04:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-03-18 21:04:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 70 states have internal predecessors, (125), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 128 transitions. [2022-03-18 21:04:25,001 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 128 transitions. Word has length 22 [2022-03-18 21:04:25,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:25,002 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 128 transitions. [2022-03-18 21:04:25,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 128 transitions. [2022-03-18 21:04:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 21:04:25,002 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:25,002 INFO L500 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] [2022-03-18 21:04:25,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 21:04:25,003 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash 307548697, now seen corresponding path program 1 times [2022-03-18 21:04:25,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:25,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358223943] [2022-03-18 21:04:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:25,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:25,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:25,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358223943] [2022-03-18 21:04:25,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358223943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:25,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:25,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699447433] [2022-03-18 21:04:25,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:25,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:25,084 INFO L87 Difference]: Start difference. First operand 74 states and 128 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:25,163 INFO L93 Difference]: Finished difference Result 135 states and 238 transitions. [2022-03-18 21:04:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:25,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2022-03-18 21:04:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:25,168 INFO L225 Difference]: With dead ends: 135 [2022-03-18 21:04:25,168 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 21:04:25,169 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:25,174 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:25,174 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:25,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 21:04:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 97. [2022-03-18 21:04:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.7849462365591398) internal successors, (166), 93 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 169 transitions. [2022-03-18 21:04:25,189 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 169 transitions. Word has length 22 [2022-03-18 21:04:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:25,189 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 169 transitions. [2022-03-18 21:04:25,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 169 transitions. [2022-03-18 21:04:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 21:04:25,190 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:25,190 INFO L500 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] [2022-03-18 21:04:25,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 21:04:25,190 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:25,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:25,191 INFO L85 PathProgramCache]: Analyzing trace with hash 14145690, now seen corresponding path program 1 times [2022-03-18 21:04:25,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:25,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896996033] [2022-03-18 21:04:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:25,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:25,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:25,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896996033] [2022-03-18 21:04:25,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896996033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:25,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:25,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:25,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28356520] [2022-03-18 21:04:25,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:25,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:25,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:25,226 INFO L87 Difference]: Start difference. First operand 97 states and 169 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:25,294 INFO L93 Difference]: Finished difference Result 137 states and 236 transitions. [2022-03-18 21:04:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:25,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2022-03-18 21:04:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:25,296 INFO L225 Difference]: With dead ends: 137 [2022-03-18 21:04:25,296 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 21:04:25,296 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:25,301 INFO L912 BasicCegarLoop]: 90 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:25,301 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 97 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 21:04:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-03-18 21:04:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.7709923664122138) internal successors, (232), 131 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 235 transitions. [2022-03-18 21:04:25,317 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 235 transitions. Word has length 22 [2022-03-18 21:04:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:25,317 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 235 transitions. [2022-03-18 21:04:25,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 235 transitions. [2022-03-18 21:04:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 21:04:25,318 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:25,318 INFO L500 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] [2022-03-18 21:04:25,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 21:04:25,319 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash 944107156, now seen corresponding path program 1 times [2022-03-18 21:04:25,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:25,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701182180] [2022-03-18 21:04:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:25,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:25,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:25,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701182180] [2022-03-18 21:04:25,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701182180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:25,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:25,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:25,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851175866] [2022-03-18 21:04:25,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:25,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:25,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:25,395 INFO L87 Difference]: Start difference. First operand 135 states and 235 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:25,458 INFO L93 Difference]: Finished difference Result 139 states and 236 transitions. [2022-03-18 21:04:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:25,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-03-18 21:04:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:25,460 INFO L225 Difference]: With dead ends: 139 [2022-03-18 21:04:25,460 INFO L226 Difference]: Without dead ends: 139 [2022-03-18 21:04:25,460 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:25,463 INFO L912 BasicCegarLoop]: 103 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:25,467 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 110 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-18 21:04:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-03-18 21:04:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 133 states have (on average 1.744360902255639) internal successors, (232), 133 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 235 transitions. [2022-03-18 21:04:25,482 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 235 transitions. Word has length 23 [2022-03-18 21:04:25,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:25,482 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 235 transitions. [2022-03-18 21:04:25,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 235 transitions. [2022-03-18 21:04:25,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 21:04:25,483 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:25,483 INFO L500 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] [2022-03-18 21:04:25,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 21:04:25,484 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 438548531, now seen corresponding path program 1 times [2022-03-18 21:04:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:25,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843498644] [2022-03-18 21:04:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:25,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:25,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:25,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843498644] [2022-03-18 21:04:25,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843498644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:25,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:25,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:25,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728508802] [2022-03-18 21:04:25,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:25,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:25,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:25,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:25,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:25,544 INFO L87 Difference]: Start difference. First operand 137 states and 235 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:25,608 INFO L93 Difference]: Finished difference Result 251 states and 436 transitions. [2022-03-18 21:04:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:25,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-03-18 21:04:25,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:25,611 INFO L225 Difference]: With dead ends: 251 [2022-03-18 21:04:25,612 INFO L226 Difference]: Without dead ends: 251 [2022-03-18 21:04:25,612 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:25,613 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:25,613 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-18 21:04:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 185. [2022-03-18 21:04:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 1.723756906077348) internal successors, (312), 181 states have internal predecessors, (312), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 315 transitions. [2022-03-18 21:04:25,625 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 315 transitions. Word has length 23 [2022-03-18 21:04:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:25,625 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 315 transitions. [2022-03-18 21:04:25,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 315 transitions. [2022-03-18 21:04:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 21:04:25,631 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:25,631 INFO L500 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] [2022-03-18 21:04:25,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 21:04:25,631 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:25,632 INFO L85 PathProgramCache]: Analyzing trace with hash 145145524, now seen corresponding path program 1 times [2022-03-18 21:04:25,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:25,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092091775] [2022-03-18 21:04:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:25,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:25,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:25,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092091775] [2022-03-18 21:04:25,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092091775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:25,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:25,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:25,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962390108] [2022-03-18 21:04:25,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:25,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:25,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:25,678 INFO L87 Difference]: Start difference. First operand 185 states and 315 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:25,740 INFO L93 Difference]: Finished difference Result 259 states and 436 transitions. [2022-03-18 21:04:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-03-18 21:04:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:25,742 INFO L225 Difference]: With dead ends: 259 [2022-03-18 21:04:25,742 INFO L226 Difference]: Without dead ends: 259 [2022-03-18 21:04:25,742 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:25,743 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:25,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 99 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-18 21:04:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2022-03-18 21:04:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.7075098814229248) internal successors, (432), 253 states have internal predecessors, (432), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 435 transitions. [2022-03-18 21:04:25,749 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 435 transitions. Word has length 23 [2022-03-18 21:04:25,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:25,749 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 435 transitions. [2022-03-18 21:04:25,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 435 transitions. [2022-03-18 21:04:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 21:04:25,750 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:25,750 INFO L500 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] [2022-03-18 21:04:25,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 21:04:25,751 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:25,751 INFO L85 PathProgramCache]: Analyzing trace with hash 710134838, now seen corresponding path program 1 times [2022-03-18 21:04:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:25,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004066798] [2022-03-18 21:04:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:25,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:25,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004066798] [2022-03-18 21:04:25,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004066798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:25,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:25,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:25,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449224875] [2022-03-18 21:04:25,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:25,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:25,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:25,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:25,795 INFO L87 Difference]: Start difference. First operand 257 states and 435 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:25,847 INFO L93 Difference]: Finished difference Result 263 states and 436 transitions. [2022-03-18 21:04:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:25,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-03-18 21:04:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:25,849 INFO L225 Difference]: With dead ends: 263 [2022-03-18 21:04:25,849 INFO L226 Difference]: Without dead ends: 263 [2022-03-18 21:04:25,849 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:25,850 INFO L912 BasicCegarLoop]: 100 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:25,851 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 107 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-18 21:04:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2022-03-18 21:04:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 257 states have (on average 1.6809338521400778) internal successors, (432), 257 states have internal predecessors, (432), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 435 transitions. [2022-03-18 21:04:25,856 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 435 transitions. Word has length 24 [2022-03-18 21:04:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:25,856 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 435 transitions. [2022-03-18 21:04:25,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 435 transitions. [2022-03-18 21:04:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 21:04:25,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:25,857 INFO L500 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] [2022-03-18 21:04:25,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 21:04:25,857 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:25,857 INFO L85 PathProgramCache]: Analyzing trace with hash 204576213, now seen corresponding path program 1 times [2022-03-18 21:04:25,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:25,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121968203] [2022-03-18 21:04:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:25,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:25,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121968203] [2022-03-18 21:04:25,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121968203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:25,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:25,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297487815] [2022-03-18 21:04:25,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:25,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:25,903 INFO L87 Difference]: Start difference. First operand 261 states and 435 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:25,966 INFO L93 Difference]: Finished difference Result 475 states and 800 transitions. [2022-03-18 21:04:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:25,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-03-18 21:04:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:25,969 INFO L225 Difference]: With dead ends: 475 [2022-03-18 21:04:25,969 INFO L226 Difference]: Without dead ends: 475 [2022-03-18 21:04:25,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:25,970 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:25,971 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 75 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-03-18 21:04:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 361. [2022-03-18 21:04:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.6470588235294117) internal successors, (588), 357 states have internal predecessors, (588), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 591 transitions. [2022-03-18 21:04:25,977 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 591 transitions. Word has length 24 [2022-03-18 21:04:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:25,977 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 591 transitions. [2022-03-18 21:04:25,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 591 transitions. [2022-03-18 21:04:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 21:04:25,978 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:25,978 INFO L500 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] [2022-03-18 21:04:25,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 21:04:25,979 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:25,979 INFO L85 PathProgramCache]: Analyzing trace with hash -88826794, now seen corresponding path program 1 times [2022-03-18 21:04:25,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:25,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9933074] [2022-03-18 21:04:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:25,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:26,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:26,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9933074] [2022-03-18 21:04:26,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9933074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:26,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:26,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:26,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532637085] [2022-03-18 21:04:26,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:26,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:26,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:26,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:26,013 INFO L87 Difference]: Start difference. First operand 361 states and 591 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:26,064 INFO L93 Difference]: Finished difference Result 499 states and 808 transitions. [2022-03-18 21:04:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:26,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-03-18 21:04:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:26,066 INFO L225 Difference]: With dead ends: 499 [2022-03-18 21:04:26,066 INFO L226 Difference]: Without dead ends: 499 [2022-03-18 21:04:26,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:26,067 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:26,067 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 101 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-18 21:04:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2022-03-18 21:04:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 493 states have (on average 1.6308316430020284) internal successors, (804), 493 states have internal predecessors, (804), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 807 transitions. [2022-03-18 21:04:26,075 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 807 transitions. Word has length 24 [2022-03-18 21:04:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:26,075 INFO L478 AbstractCegarLoop]: Abstraction has 497 states and 807 transitions. [2022-03-18 21:04:26,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 807 transitions. [2022-03-18 21:04:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 21:04:26,077 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:26,077 INFO L500 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] [2022-03-18 21:04:26,077 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-18 21:04:26,077 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2046927696, now seen corresponding path program 1 times [2022-03-18 21:04:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:26,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984834851] [2022-03-18 21:04:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:26,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:26,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:26,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984834851] [2022-03-18 21:04:26,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984834851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:26,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:26,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:26,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611801381] [2022-03-18 21:04:26,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:26,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:26,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:26,138 INFO L87 Difference]: Start difference. First operand 497 states and 807 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) [2022-03-18 21:04:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:26,194 INFO L93 Difference]: Finished difference Result 507 states and 808 transitions. [2022-03-18 21:04:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:26,195 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 [2022-03-18 21:04:26,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:26,197 INFO L225 Difference]: With dead ends: 507 [2022-03-18 21:04:26,197 INFO L226 Difference]: Without dead ends: 507 [2022-03-18 21:04:26,198 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:26,199 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 128 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:26,199 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 104 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:26,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-18 21:04:26,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2022-03-18 21:04:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.6047904191616766) internal successors, (804), 501 states have internal predecessors, (804), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 807 transitions. [2022-03-18 21:04:26,209 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 807 transitions. Word has length 25 [2022-03-18 21:04:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:26,209 INFO L478 AbstractCegarLoop]: Abstraction has 505 states and 807 transitions. [2022-03-18 21:04:26,210 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) [2022-03-18 21:04:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 807 transitions. [2022-03-18 21:04:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 21:04:26,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:26,211 INFO L500 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] [2022-03-18 21:04:26,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-18 21:04:26,211 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:26,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1541369071, now seen corresponding path program 1 times [2022-03-18 21:04:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:26,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988354369] [2022-03-18 21:04:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:26,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:26,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988354369] [2022-03-18 21:04:26,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988354369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:26,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:26,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:26,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946604692] [2022-03-18 21:04:26,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:26,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:26,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:26,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:26,248 INFO L87 Difference]: Start difference. First operand 505 states and 807 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) [2022-03-18 21:04:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:26,301 INFO L93 Difference]: Finished difference Result 907 states and 1464 transitions. [2022-03-18 21:04:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:26,302 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 [2022-03-18 21:04:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:26,305 INFO L225 Difference]: With dead ends: 907 [2022-03-18 21:04:26,305 INFO L226 Difference]: Without dead ends: 907 [2022-03-18 21:04:26,305 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:26,306 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:26,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 74 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-18 21:04:26,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 713. [2022-03-18 21:04:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 709 states have (on average 1.5627644569816643) internal successors, (1108), 709 states have internal predecessors, (1108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1111 transitions. [2022-03-18 21:04:26,319 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1111 transitions. Word has length 25 [2022-03-18 21:04:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:26,319 INFO L478 AbstractCegarLoop]: Abstraction has 713 states and 1111 transitions. [2022-03-18 21:04:26,319 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) [2022-03-18 21:04:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1111 transitions. [2022-03-18 21:04:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 21:04:26,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:26,320 INFO L500 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] [2022-03-18 21:04:26,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-18 21:04:26,320 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:26,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:26,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1247966064, now seen corresponding path program 1 times [2022-03-18 21:04:26,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:26,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465347933] [2022-03-18 21:04:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:26,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:26,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465347933] [2022-03-18 21:04:26,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465347933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:26,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:26,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:26,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139313329] [2022-03-18 21:04:26,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:26,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:26,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:26,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:26,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:26,372 INFO L87 Difference]: Start difference. First operand 713 states and 1111 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) [2022-03-18 21:04:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:26,425 INFO L93 Difference]: Finished difference Result 971 states and 1496 transitions. [2022-03-18 21:04:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:26,425 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 [2022-03-18 21:04:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:26,428 INFO L225 Difference]: With dead ends: 971 [2022-03-18 21:04:26,428 INFO L226 Difference]: Without dead ends: 971 [2022-03-18 21:04:26,428 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:26,429 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:26,429 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 103 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-03-18 21:04:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 969. [2022-03-18 21:04:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.5461139896373057) internal successors, (1492), 965 states have internal predecessors, (1492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1495 transitions. [2022-03-18 21:04:26,445 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1495 transitions. Word has length 25 [2022-03-18 21:04:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:26,445 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1495 transitions. [2022-03-18 21:04:26,445 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) [2022-03-18 21:04:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1495 transitions. [2022-03-18 21:04:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 21:04:26,447 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:26,447 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:26,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-18 21:04:26,448 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash 537833458, now seen corresponding path program 1 times [2022-03-18 21:04:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945156677] [2022-03-18 21:04:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:26,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:26,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945156677] [2022-03-18 21:04:26,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945156677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:26,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:26,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:26,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173046036] [2022-03-18 21:04:26,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:26,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:26,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:26,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:26,476 INFO L87 Difference]: Start difference. First operand 969 states and 1495 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:26,530 INFO L93 Difference]: Finished difference Result 987 states and 1496 transitions. [2022-03-18 21:04:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:26,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-18 21:04:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:26,533 INFO L225 Difference]: With dead ends: 987 [2022-03-18 21:04:26,533 INFO L226 Difference]: Without dead ends: 987 [2022-03-18 21:04:26,533 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:26,534 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:26,534 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 101 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-03-18 21:04:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 985. [2022-03-18 21:04:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 981 states have (on average 1.5208970438328238) internal successors, (1492), 981 states have internal predecessors, (1492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1495 transitions. [2022-03-18 21:04:26,549 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1495 transitions. Word has length 26 [2022-03-18 21:04:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:26,549 INFO L478 AbstractCegarLoop]: Abstraction has 985 states and 1495 transitions. [2022-03-18 21:04:26,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1495 transitions. [2022-03-18 21:04:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 21:04:26,550 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:26,550 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:26,550 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-18 21:04:26,550 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash 32274833, now seen corresponding path program 1 times [2022-03-18 21:04:26,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:26,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810576840] [2022-03-18 21:04:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:26,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:26,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:26,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810576840] [2022-03-18 21:04:26,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810576840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:26,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:26,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092127334] [2022-03-18 21:04:26,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:26,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:26,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:26,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:26,579 INFO L87 Difference]: Start difference. First operand 985 states and 1495 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:26,634 INFO L93 Difference]: Finished difference Result 1739 states and 2664 transitions. [2022-03-18 21:04:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:26,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-18 21:04:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:26,639 INFO L225 Difference]: With dead ends: 1739 [2022-03-18 21:04:26,639 INFO L226 Difference]: Without dead ends: 1739 [2022-03-18 21:04:26,640 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:26,640 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:26,640 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 73 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-03-18 21:04:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1417. [2022-03-18 21:04:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1413 states have (on average 1.4748761500353857) internal successors, (2084), 1413 states have internal predecessors, (2084), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2087 transitions. [2022-03-18 21:04:26,663 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2087 transitions. Word has length 26 [2022-03-18 21:04:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:26,663 INFO L478 AbstractCegarLoop]: Abstraction has 1417 states and 2087 transitions. [2022-03-18 21:04:26,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2087 transitions. [2022-03-18 21:04:26,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 21:04:26,665 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:26,665 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:26,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-18 21:04:26,665 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:26,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash -261128174, now seen corresponding path program 1 times [2022-03-18 21:04:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:26,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146809458] [2022-03-18 21:04:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:26,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:26,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:26,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146809458] [2022-03-18 21:04:26,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146809458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:26,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:26,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:26,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035278451] [2022-03-18 21:04:26,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:26,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:26,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:26,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:26,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:26,719 INFO L87 Difference]: Start difference. First operand 1417 states and 2087 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:26,831 INFO L93 Difference]: Finished difference Result 1899 states and 2760 transitions. [2022-03-18 21:04:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:26,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-18 21:04:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:26,836 INFO L225 Difference]: With dead ends: 1899 [2022-03-18 21:04:26,836 INFO L226 Difference]: Without dead ends: 1899 [2022-03-18 21:04:26,836 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:26,836 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:26,836 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 105 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:04:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-03-18 21:04:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1897. [2022-03-18 21:04:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1893 states have (on average 1.4558901215002642) internal successors, (2756), 1893 states have internal predecessors, (2756), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2759 transitions. [2022-03-18 21:04:26,860 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2759 transitions. Word has length 26 [2022-03-18 21:04:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:26,860 INFO L478 AbstractCegarLoop]: Abstraction has 1897 states and 2759 transitions. [2022-03-18 21:04:26,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2759 transitions. [2022-03-18 21:04:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 21:04:26,862 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:26,862 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:26,862 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-18 21:04:26,862 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:26,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:26,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1000552460, now seen corresponding path program 1 times [2022-03-18 21:04:26,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:26,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560553475] [2022-03-18 21:04:26,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:26,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:26,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:26,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560553475] [2022-03-18 21:04:26,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560553475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:26,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:26,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:26,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992535786] [2022-03-18 21:04:26,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:26,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:26,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:26,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:26,906 INFO L87 Difference]: Start difference. First operand 1897 states and 2759 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:26,965 INFO L93 Difference]: Finished difference Result 1931 states and 2760 transitions. [2022-03-18 21:04:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 21:04:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:26,969 INFO L225 Difference]: With dead ends: 1931 [2022-03-18 21:04:26,969 INFO L226 Difference]: Without dead ends: 1931 [2022-03-18 21:04:26,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:26,970 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:26,970 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-03-18 21:04:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1929. [2022-03-18 21:04:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.4316883116883117) internal successors, (2756), 1925 states have internal predecessors, (2756), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2759 transitions. [2022-03-18 21:04:26,992 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2759 transitions. Word has length 27 [2022-03-18 21:04:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:26,993 INFO L478 AbstractCegarLoop]: Abstraction has 1929 states and 2759 transitions. [2022-03-18 21:04:26,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2759 transitions. [2022-03-18 21:04:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 21:04:26,994 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:26,994 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:26,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-18 21:04:26,995 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:26,995 INFO L85 PathProgramCache]: Analyzing trace with hash 494993835, now seen corresponding path program 1 times [2022-03-18 21:04:26,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:26,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118237060] [2022-03-18 21:04:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:26,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:27,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:27,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118237060] [2022-03-18 21:04:27,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118237060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:27,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:27,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:27,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588372019] [2022-03-18 21:04:27,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:27,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:27,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:27,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:27,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:27,023 INFO L87 Difference]: Start difference. First operand 1929 states and 2759 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:27,077 INFO L93 Difference]: Finished difference Result 3339 states and 4808 transitions. [2022-03-18 21:04:27,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:27,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 21:04:27,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:27,085 INFO L225 Difference]: With dead ends: 3339 [2022-03-18 21:04:27,085 INFO L226 Difference]: Without dead ends: 3339 [2022-03-18 21:04:27,085 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:27,085 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:27,086 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 72 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-03-18 21:04:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2825. [2022-03-18 21:04:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2821 states have (on average 1.3853243530662886) internal successors, (3908), 2821 states have internal predecessors, (3908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3911 transitions. [2022-03-18 21:04:27,128 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3911 transitions. Word has length 27 [2022-03-18 21:04:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:27,128 INFO L478 AbstractCegarLoop]: Abstraction has 2825 states and 3911 transitions. [2022-03-18 21:04:27,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3911 transitions. [2022-03-18 21:04:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 21:04:27,131 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:27,131 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:27,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-18 21:04:27,131 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:27,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash 201590828, now seen corresponding path program 1 times [2022-03-18 21:04:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:27,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726589951] [2022-03-18 21:04:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:27,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:27,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726589951] [2022-03-18 21:04:27,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726589951] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:27,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:27,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:27,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721423829] [2022-03-18 21:04:27,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:27,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:27,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:27,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:27,156 INFO L87 Difference]: Start difference. First operand 2825 states and 3911 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:27,218 INFO L93 Difference]: Finished difference Result 3723 states and 5064 transitions. [2022-03-18 21:04:27,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:27,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 21:04:27,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:27,226 INFO L225 Difference]: With dead ends: 3723 [2022-03-18 21:04:27,226 INFO L226 Difference]: Without dead ends: 3723 [2022-03-18 21:04:27,226 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:27,227 INFO L912 BasicCegarLoop]: 100 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:27,227 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 107 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-03-18 21:04:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3721. [2022-03-18 21:04:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3717 states have (on average 1.3613128867366155) internal successors, (5060), 3717 states have internal predecessors, (5060), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5063 transitions. [2022-03-18 21:04:27,291 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5063 transitions. Word has length 27 [2022-03-18 21:04:27,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:27,291 INFO L478 AbstractCegarLoop]: Abstraction has 3721 states and 5063 transitions. [2022-03-18 21:04:27,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5063 transitions. [2022-03-18 21:04:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 21:04:27,294 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:27,294 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:27,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-18 21:04:27,294 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1835027538, now seen corresponding path program 1 times [2022-03-18 21:04:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:27,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947004393] [2022-03-18 21:04:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:27,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:27,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:27,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947004393] [2022-03-18 21:04:27,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947004393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:27,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:27,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:27,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825835203] [2022-03-18 21:04:27,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:27,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:27,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:27,315 INFO L87 Difference]: Start difference. First operand 3721 states and 5063 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:27,374 INFO L93 Difference]: Finished difference Result 3787 states and 5064 transitions. [2022-03-18 21:04:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-18 21:04:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:27,384 INFO L225 Difference]: With dead ends: 3787 [2022-03-18 21:04:27,384 INFO L226 Difference]: Without dead ends: 3787 [2022-03-18 21:04:27,384 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:27,384 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 125 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:27,385 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 95 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2022-03-18 21:04:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3785. [2022-03-18 21:04:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3781 states have (on average 1.3382702988627346) internal successors, (5060), 3781 states have internal predecessors, (5060), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5063 transitions. [2022-03-18 21:04:27,476 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5063 transitions. Word has length 28 [2022-03-18 21:04:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:27,476 INFO L478 AbstractCegarLoop]: Abstraction has 3785 states and 5063 transitions. [2022-03-18 21:04:27,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5063 transitions. [2022-03-18 21:04:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 21:04:27,480 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:27,480 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:27,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-18 21:04:27,480 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:27,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1954381133, now seen corresponding path program 1 times [2022-03-18 21:04:27,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:27,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946205822] [2022-03-18 21:04:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:27,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:27,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:27,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946205822] [2022-03-18 21:04:27,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946205822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:27,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:27,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:27,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853602372] [2022-03-18 21:04:27,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:27,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:27,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:27,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:27,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:27,527 INFO L87 Difference]: Start difference. First operand 3785 states and 5063 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:27,598 INFO L93 Difference]: Finished difference Result 6411 states and 8584 transitions. [2022-03-18 21:04:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-18 21:04:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:27,625 INFO L225 Difference]: With dead ends: 6411 [2022-03-18 21:04:27,626 INFO L226 Difference]: Without dead ends: 6411 [2022-03-18 21:04:27,626 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:27,627 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:27,627 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 71 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2022-03-18 21:04:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5641. [2022-03-18 21:04:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.2950150789427) internal successors, (7300), 5637 states have internal predecessors, (7300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 7303 transitions. [2022-03-18 21:04:27,730 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 7303 transitions. Word has length 28 [2022-03-18 21:04:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:27,730 INFO L478 AbstractCegarLoop]: Abstraction has 5641 states and 7303 transitions. [2022-03-18 21:04:27,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 7303 transitions. [2022-03-18 21:04:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 21:04:27,735 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:27,735 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:27,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-18 21:04:27,735 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:27,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1660978126, now seen corresponding path program 1 times [2022-03-18 21:04:27,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:27,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832709464] [2022-03-18 21:04:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:27,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:27,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:27,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832709464] [2022-03-18 21:04:27,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832709464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:27,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:27,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:27,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168621378] [2022-03-18 21:04:27,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:27,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:27,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:27,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:27,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:27,755 INFO L87 Difference]: Start difference. First operand 5641 states and 7303 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:27,814 INFO L93 Difference]: Finished difference Result 7307 states and 9224 transitions. [2022-03-18 21:04:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-18 21:04:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:27,823 INFO L225 Difference]: With dead ends: 7307 [2022-03-18 21:04:27,823 INFO L226 Difference]: Without dead ends: 7307 [2022-03-18 21:04:27,823 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:27,824 INFO L912 BasicCegarLoop]: 102 mSDtfsCounter, 106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:27,824 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 109 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2022-03-18 21:04:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 7305. [2022-03-18 21:04:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7301 states have (on average 1.2628407067524996) internal successors, (9220), 7301 states have internal predecessors, (9220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 9223 transitions. [2022-03-18 21:04:27,898 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 9223 transitions. Word has length 28 [2022-03-18 21:04:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:27,898 INFO L478 AbstractCegarLoop]: Abstraction has 7305 states and 9223 transitions. [2022-03-18 21:04:27,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 9223 transitions. [2022-03-18 21:04:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 21:04:27,904 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:27,904 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:27,905 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-18 21:04:27,905 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash 456305864, now seen corresponding path program 1 times [2022-03-18 21:04:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:27,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503455780] [2022-03-18 21:04:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:27,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503455780] [2022-03-18 21:04:27,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503455780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:27,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:27,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156960702] [2022-03-18 21:04:27,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:27,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:27,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:27,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:27,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:27,942 INFO L87 Difference]: Start difference. First operand 7305 states and 9223 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:28,001 INFO L93 Difference]: Finished difference Result 7435 states and 9224 transitions. [2022-03-18 21:04:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:28,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 21:04:28,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:28,012 INFO L225 Difference]: With dead ends: 7435 [2022-03-18 21:04:28,012 INFO L226 Difference]: Without dead ends: 7435 [2022-03-18 21:04:28,012 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:28,014 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:28,014 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 92 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2022-03-18 21:04:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 7433. [2022-03-18 21:04:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7429 states have (on average 1.2410822452550814) internal successors, (9220), 7429 states have internal predecessors, (9220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 9223 transitions. [2022-03-18 21:04:28,144 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 9223 transitions. Word has length 29 [2022-03-18 21:04:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:28,145 INFO L478 AbstractCegarLoop]: Abstraction has 7433 states and 9223 transitions. [2022-03-18 21:04:28,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 9223 transitions. [2022-03-18 21:04:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 21:04:28,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:28,150 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:28,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-18 21:04:28,151 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:28,152 INFO L85 PathProgramCache]: Analyzing trace with hash -49252761, now seen corresponding path program 1 times [2022-03-18 21:04:28,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:28,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369357981] [2022-03-18 21:04:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:28,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:28,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:28,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:28,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369357981] [2022-03-18 21:04:28,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369357981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:28,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:28,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:28,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754688424] [2022-03-18 21:04:28,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:28,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:28,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:28,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:28,174 INFO L87 Difference]: Start difference. First operand 7433 states and 9223 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:28,246 INFO L93 Difference]: Finished difference Result 12299 states and 15112 transitions. [2022-03-18 21:04:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:28,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 21:04:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:28,267 INFO L225 Difference]: With dead ends: 12299 [2022-03-18 21:04:28,267 INFO L226 Difference]: Without dead ends: 12299 [2022-03-18 21:04:28,267 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:28,268 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:28,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2022-03-18 21:04:28,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11273. [2022-03-18 21:04:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.2043659597124856) internal successors, (13572), 11269 states have internal predecessors, (13572), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 13575 transitions. [2022-03-18 21:04:28,414 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 13575 transitions. Word has length 29 [2022-03-18 21:04:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:28,414 INFO L478 AbstractCegarLoop]: Abstraction has 11273 states and 13575 transitions. [2022-03-18 21:04:28,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 13575 transitions. [2022-03-18 21:04:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 21:04:28,426 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:28,426 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:28,426 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-18 21:04:28,426 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -342655768, now seen corresponding path program 1 times [2022-03-18 21:04:28,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:28,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367713454] [2022-03-18 21:04:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:28,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:28,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:28,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:28,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367713454] [2022-03-18 21:04:28,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367713454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:28,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:28,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:28,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026482482] [2022-03-18 21:04:28,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:28,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:28,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:28,457 INFO L87 Difference]: Start difference. First operand 11273 states and 13575 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:28,542 INFO L93 Difference]: Finished difference Result 14347 states and 16648 transitions. [2022-03-18 21:04:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 21:04:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:28,563 INFO L225 Difference]: With dead ends: 14347 [2022-03-18 21:04:28,563 INFO L226 Difference]: Without dead ends: 14347 [2022-03-18 21:04:28,564 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:28,564 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:28,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2022-03-18 21:04:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 14345. [2022-03-18 21:04:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.1605885224182415) internal successors, (16644), 14341 states have internal predecessors, (16644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 16647 transitions. [2022-03-18 21:04:28,773 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 16647 transitions. Word has length 29 [2022-03-18 21:04:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:28,773 INFO L478 AbstractCegarLoop]: Abstraction has 14345 states and 16647 transitions. [2022-03-18 21:04:28,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 16647 transitions. [2022-03-18 21:04:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 21:04:28,785 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:28,786 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:28,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-18 21:04:28,786 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1526802582, now seen corresponding path program 1 times [2022-03-18 21:04:28,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:28,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799985705] [2022-03-18 21:04:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:28,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:28,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:28,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:28,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799985705] [2022-03-18 21:04:28,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799985705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:28,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:28,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:28,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599296251] [2022-03-18 21:04:28,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:28,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:28,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:28,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:28,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:28,811 INFO L87 Difference]: Start difference. First operand 14345 states and 16647 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:28,887 INFO L93 Difference]: Finished difference Result 14603 states and 16648 transitions. [2022-03-18 21:04:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:28,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-18 21:04:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:28,908 INFO L225 Difference]: With dead ends: 14603 [2022-03-18 21:04:28,909 INFO L226 Difference]: Without dead ends: 14603 [2022-03-18 21:04:28,909 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:28,909 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 123 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:28,910 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 89 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2022-03-18 21:04:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14601. [2022-03-18 21:04:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14601 states, 14597 states have (on average 1.1402342947180928) internal successors, (16644), 14597 states have internal predecessors, (16644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 16647 transitions. [2022-03-18 21:04:29,059 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 16647 transitions. Word has length 30 [2022-03-18 21:04:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:29,059 INFO L478 AbstractCegarLoop]: Abstraction has 14601 states and 16647 transitions. [2022-03-18 21:04:29,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:29,060 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 16647 transitions. [2022-03-18 21:04:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 21:04:29,072 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:29,072 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:29,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-18 21:04:29,072 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2032361207, now seen corresponding path program 1 times [2022-03-18 21:04:29,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:29,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704220946] [2022-03-18 21:04:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:29,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:29,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:29,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:29,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704220946] [2022-03-18 21:04:29,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704220946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:29,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:29,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:29,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248506067] [2022-03-18 21:04:29,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:29,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:29,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:29,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:29,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:29,122 INFO L87 Difference]: Start difference. First operand 14601 states and 16647 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:29,211 INFO L93 Difference]: Finished difference Result 23561 states and 26119 transitions. [2022-03-18 21:04:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:29,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-18 21:04:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:29,242 INFO L225 Difference]: With dead ends: 23561 [2022-03-18 21:04:29,242 INFO L226 Difference]: Without dead ends: 23561 [2022-03-18 21:04:29,242 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:29,243 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 104 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:29,243 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 68 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23561 states. [2022-03-18 21:04:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23561 to 22537. [2022-03-18 21:04:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22537 states, 22533 states have (on average 1.1135667687391826) internal successors, (25092), 22533 states have internal predecessors, (25092), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22537 states to 22537 states and 25095 transitions. [2022-03-18 21:04:29,466 INFO L78 Accepts]: Start accepts. Automaton has 22537 states and 25095 transitions. Word has length 30 [2022-03-18 21:04:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:29,467 INFO L478 AbstractCegarLoop]: Abstraction has 22537 states and 25095 transitions. [2022-03-18 21:04:29,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 22537 states and 25095 transitions. [2022-03-18 21:04:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 21:04:29,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:04:29,503 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:04:29,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-18 21:04:29,503 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:04:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:04:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1969203082, now seen corresponding path program 1 times [2022-03-18 21:04:29,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:04:29,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738854873] [2022-03-18 21:04:29,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:04:29,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:04:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:29,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:04:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:04:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:04:29,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:04:29,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738854873] [2022-03-18 21:04:29,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738854873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:04:29,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:04:29,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:04:29,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922086792] [2022-03-18 21:04:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:04:29,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:04:29,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:04:29,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:04:29,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:04:29,572 INFO L87 Difference]: Start difference. First operand 22537 states and 25095 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:04:29,692 INFO L93 Difference]: Finished difference Result 28167 states and 29702 transitions. [2022-03-18 21:04:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:04:29,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-18 21:04:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:04:29,693 INFO L225 Difference]: With dead ends: 28167 [2022-03-18 21:04:29,693 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 21:04:29,694 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:04:29,694 INFO L912 BasicCegarLoop]: 105 mSDtfsCounter, 91 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:04:29,694 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 112 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:04:29,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 21:04:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 21:04:29,695 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) [2022-03-18 21:04:29,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 21:04:29,695 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-03-18 21:04:29,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:04:29,695 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 21:04:29,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:04:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 21:04:29,695 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 21:04:29,697 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 21:04:29,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-18 21:04:29,701 INFO L718 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] [2022-03-18 21:04:29,702 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 21:04:29,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:04:29 BasicIcfg [2022-03-18 21:04:29,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 21:04:29,705 INFO L158 Benchmark]: Toolchain (without parser) took 6300.78ms. Allocated memory was 188.7MB in the beginning and 625.0MB in the end (delta: 436.2MB). Free memory was 137.0MB in the beginning and 525.9MB in the end (delta: -389.0MB). Peak memory consumption was 48.3MB. Max. memory is 8.0GB. [2022-03-18 21:04:29,705 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 153.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 21:04:29,705 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.97ms. Allocated memory was 188.7MB in the beginning and 305.1MB in the end (delta: 116.4MB). Free memory was 136.8MB in the beginning and 278.5MB in the end (delta: -141.7MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-03-18 21:04:29,706 INFO L158 Benchmark]: Boogie Preprocessor took 31.71ms. Allocated memory is still 305.1MB. Free memory was 278.1MB in the beginning and 276.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 21:04:29,706 INFO L158 Benchmark]: RCFGBuilder took 317.16ms. Allocated memory is still 305.1MB. Free memory was 276.6MB in the beginning and 264.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-18 21:04:29,708 INFO L158 Benchmark]: IcfgTransformer took 25.50ms. Allocated memory is still 305.1MB. Free memory was 264.0MB in the beginning and 262.9MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 21:04:29,708 INFO L158 Benchmark]: TraceAbstraction took 5635.01ms. Allocated memory was 305.1MB in the beginning and 625.0MB in the end (delta: 319.8MB). Free memory was 262.4MB in the beginning and 525.9MB in the end (delta: -263.6MB). Peak memory consumption was 57.2MB. Max. memory is 8.0GB. [2022-03-18 21:04:29,714 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 153.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 282.97ms. Allocated memory was 188.7MB in the beginning and 305.1MB in the end (delta: 116.4MB). Free memory was 136.8MB in the beginning and 278.5MB in the end (delta: -141.7MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.71ms. Allocated memory is still 305.1MB. Free memory was 278.1MB in the beginning and 276.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 317.16ms. Allocated memory is still 305.1MB. Free memory was 276.6MB in the beginning and 264.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 25.50ms. Allocated memory is still 305.1MB. Free memory was 264.0MB in the beginning and 262.9MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 5635.01ms. Allocated memory was 305.1MB in the beginning and 625.0MB in the end (delta: 319.8MB). Free memory was 262.4MB in the beginning and 525.9MB in the end (delta: -263.6MB). Peak memory consumption was 57.2MB. 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: 163]: 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, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.6s, OverallIterations: 29, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3720 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3720 mSDsluCounter, 2693 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 205 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1747 IncrementalHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 2488 mSDtfsCounter, 1747 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 203 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22537occurred in iteration=28, InterpolantAutomatonStates: 116, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 29 MinimizatonAttempts, 4126 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 744 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 715 ConstructedInterpolants, 0 QuantifiedInterpolants, 1579 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 29 InterpolantComputations, 29 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! [2022-03-18 21:04:29,767 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...