/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:10:40,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:10:40,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:10:40,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 12:10:40,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 12:10:40,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 12:10:40,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 12:10:40,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 12:10:40,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 12:10:40,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 12:10:40,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 12:10:40,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 12:10:40,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 12:10:40,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 12:10:40,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 12:10:40,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 12:10:40,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 12:10:40,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 12:10:40,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 12:10:40,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 12:10:40,964 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 12:10:40,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 12:10:40,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 12:10:40,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 12:10:40,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 12:10:40,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 12:10:40,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:10:40,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:10:40,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:10:40,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 12:10:41,006 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:10:41,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:10:41,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 12:10:41,008 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 12:10:41,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 12:10:41,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 12:10:41,009 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 12:10:41,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:10:41,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:10:41,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:10:41,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:10:41,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:10:41,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:10:41,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:10:41,010 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:10:41,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:10:41,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:10:41,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:10:41,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:10:41,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:10:41,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:10:41,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 12:10:41,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 12:10:41,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 12:10:41,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 12:10:41,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:10:41,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 12:10:41,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 12:10:41,012 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 12:10:41,012 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:10:41,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:10:41,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:10:41,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:10:41,177 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:10:41,195 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:10:41,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2022-03-20 12:10:41,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ec15489a/8c2167cb5f544a30b95bb2a42e924d8c/FLAG2283fd5e3 [2022-03-20 12:10:41,615 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:10:41,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_9.c [2022-03-20 12:10:41,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ec15489a/8c2167cb5f544a30b95bb2a42e924d8c/FLAG2283fd5e3 [2022-03-20 12:10:42,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ec15489a/8c2167cb5f544a30b95bb2a42e924d8c [2022-03-20 12:10:42,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:10:42,038 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 12:10:42,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:10:42,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:10:42,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:10:42,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd4422e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42, skipping insertion in model container [2022-03-20 12:10:42,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:10:42,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:10:42,285 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_9.c[3555,3568] [2022-03-20 12:10:42,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:10:42,293 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:10:42,307 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_9.c[3555,3568] [2022-03-20 12:10:42,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:10:42,315 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:10:42,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42 WrapperNode [2022-03-20 12:10:42,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:10:42,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:10:42,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:10:42,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:10:42,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:10:42,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:10:42,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:10:42,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:10:42,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:10:42,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:10:42,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 12:10:42,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 12:10:42,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:10:42,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:10:42,391 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:10:42,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:10:42,391 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:10:42,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:10:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:10:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:10:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:10:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:10:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:10:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:10:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:10:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:10:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:10:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:10:42,462 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:10:42,463 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:10:42,643 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:10:42,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:10:42,649 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 12:10:42,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:42 BoogieIcfgContainer [2022-03-20 12:10:42,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:10:42,651 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 12:10:42,651 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 12:10:42,652 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 12:10:42,654 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:42" (1/1) ... [2022-03-20 12:10:42,655 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 12:10:42,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 12:10:42 BasicIcfg [2022-03-20 12:10:42,666 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 12:10:42,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:10:42,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:10:42,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:10:42,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:10:42" (1/4) ... [2022-03-20 12:10:42,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162a1821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:10:42, skipping insertion in model container [2022-03-20 12:10:42,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:42" (2/4) ... [2022-03-20 12:10:42,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162a1821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:10:42, skipping insertion in model container [2022-03-20 12:10:42,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:42" (3/4) ... [2022-03-20 12:10:42,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162a1821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:10:42, skipping insertion in model container [2022-03-20 12:10:42,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 12:10:42" (4/4) ... [2022-03-20 12:10:42,671 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.cqvasr [2022-03-20 12:10:42,674 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:10:42,674 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:10:42,701 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:10:42,706 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 12:10:42,706 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:10:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 37 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:10:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:10:42,719 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:42,719 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:42,720 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:42,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:42,723 INFO L85 PathProgramCache]: Analyzing trace with hash -311393162, now seen corresponding path program 1 times [2022-03-20 12:10:42,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:42,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807353763] [2022-03-20 12:10:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:42,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:42,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:42,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807353763] [2022-03-20 12:10:42,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807353763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:42,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:42,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555903516] [2022-03-20 12:10:42,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:42,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:42,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:42,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:42,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:42,963 INFO L87 Difference]: Start difference. First operand has 42 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 37 states have internal predecessors, (67), 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 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:43,102 INFO L93 Difference]: Finished difference Result 82 states and 139 transitions. [2022-03-20 12:10:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:43,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 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 20 [2022-03-20 12:10:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:43,110 INFO L225 Difference]: With dead ends: 82 [2022-03-20 12:10:43,110 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 12:10:43,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:43,114 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 157 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:43,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 83 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:10:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 12:10:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2022-03-20 12:10:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 82 transitions. [2022-03-20 12:10:43,138 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 82 transitions. Word has length 20 [2022-03-20 12:10:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:43,139 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 82 transitions. [2022-03-20 12:10:43,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,139 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 82 transitions. [2022-03-20 12:10:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:10:43,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:43,140 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:43,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:10:43,140 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash -182310443, now seen corresponding path program 1 times [2022-03-20 12:10:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:43,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356818273] [2022-03-20 12:10:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:43,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:43,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:43,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356818273] [2022-03-20 12:10:43,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356818273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:43,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:43,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:43,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176456395] [2022-03-20 12:10:43,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:43,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:43,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:43,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:43,186 INFO L87 Difference]: Start difference. First operand 47 states and 82 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:43,250 INFO L93 Difference]: Finished difference Result 108 states and 193 transitions. [2022-03-20 12:10:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:43,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 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 20 [2022-03-20 12:10:43,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:43,252 INFO L225 Difference]: With dead ends: 108 [2022-03-20 12:10:43,252 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 12:10:43,252 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:43,253 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:43,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 87 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:10:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 12:10:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-03-20 12:10:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.819672131147541) internal successors, (111), 61 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2022-03-20 12:10:43,260 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 20 [2022-03-20 12:10:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:43,260 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2022-03-20 12:10:43,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2022-03-20 12:10:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:10:43,261 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:43,261 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:43,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:10:43,261 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:43,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1063221432, now seen corresponding path program 1 times [2022-03-20 12:10:43,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:43,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004495672] [2022-03-20 12:10:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:43,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:43,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:43,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004495672] [2022-03-20 12:10:43,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004495672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:43,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:43,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:43,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053807670] [2022-03-20 12:10:43,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:43,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:43,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:43,312 INFO L87 Difference]: Start difference. First operand 65 states and 114 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) [2022-03-20 12:10:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:43,381 INFO L93 Difference]: Finished difference Result 100 states and 172 transitions. [2022-03-20 12:10:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:43,381 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 [2022-03-20 12:10:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:43,382 INFO L225 Difference]: With dead ends: 100 [2022-03-20 12:10:43,382 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 12:10:43,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:43,383 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:43,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 103 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:10:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 12:10:43,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-03-20 12:10:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.765625) internal successors, (113), 64 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 116 transitions. [2022-03-20 12:10:43,389 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 116 transitions. Word has length 21 [2022-03-20 12:10:43,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:43,389 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 116 transitions. [2022-03-20 12:10:43,389 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) [2022-03-20 12:10:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 116 transitions. [2022-03-20 12:10:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:10:43,390 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:43,390 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:43,390 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 12:10:43,390 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:43,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:43,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1356624439, now seen corresponding path program 1 times [2022-03-20 12:10:43,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:43,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056767508] [2022-03-20 12:10:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:43,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:43,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:43,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056767508] [2022-03-20 12:10:43,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056767508] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:43,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:43,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:43,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026530986] [2022-03-20 12:10:43,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:43,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:43,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:43,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:43,426 INFO L87 Difference]: Start difference. First operand 68 states and 116 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) [2022-03-20 12:10:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:43,482 INFO L93 Difference]: Finished difference Result 125 states and 217 transitions. [2022-03-20 12:10:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:43,482 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 [2022-03-20 12:10:43,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:43,483 INFO L225 Difference]: With dead ends: 125 [2022-03-20 12:10:43,483 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 12:10:43,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:43,484 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 144 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 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 [2022-03-20 12:10:43,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 71 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 12:10:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 89. [2022-03-20 12:10:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.7647058823529411) internal successors, (150), 85 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 153 transitions. [2022-03-20 12:10:43,491 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 153 transitions. Word has length 21 [2022-03-20 12:10:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:43,492 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 153 transitions. [2022-03-20 12:10:43,492 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) [2022-03-20 12:10:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 153 transitions. [2022-03-20 12:10:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:10:43,493 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:43,493 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:43,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 12:10:43,493 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:43,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1227541720, now seen corresponding path program 1 times [2022-03-20 12:10:43,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:43,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805890675] [2022-03-20 12:10:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:43,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:43,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:43,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805890675] [2022-03-20 12:10:43,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805890675] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:43,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:43,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:43,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844525036] [2022-03-20 12:10:43,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:43,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:43,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:43,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:43,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:43,528 INFO L87 Difference]: Start difference. First operand 89 states and 153 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) [2022-03-20 12:10:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:43,587 INFO L93 Difference]: Finished difference Result 205 states and 359 transitions. [2022-03-20 12:10:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:43,588 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 [2022-03-20 12:10:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:43,591 INFO L225 Difference]: With dead ends: 205 [2022-03-20 12:10:43,591 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 12:10:43,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:43,592 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 89 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 [2022-03-20 12:10:43,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 89 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 12:10:43,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-03-20 12:10:43,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.7478991596638656) internal successors, (208), 119 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 211 transitions. [2022-03-20 12:10:43,598 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 211 transitions. Word has length 21 [2022-03-20 12:10:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:43,599 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 211 transitions. [2022-03-20 12:10:43,599 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) [2022-03-20 12:10:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 211 transitions. [2022-03-20 12:10:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:10:43,599 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:43,600 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:43,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 12:10:43,600 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash 894347473, now seen corresponding path program 1 times [2022-03-20 12:10:43,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:43,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102580737] [2022-03-20 12:10:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:43,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:43,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:43,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102580737] [2022-03-20 12:10:43,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102580737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:43,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:43,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:43,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529204676] [2022-03-20 12:10:43,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:43,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:43,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:43,645 INFO L87 Difference]: Start difference. First operand 123 states and 211 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) [2022-03-20 12:10:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:43,699 INFO L93 Difference]: Finished difference Result 184 states and 314 transitions. [2022-03-20 12:10:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:43,700 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 [2022-03-20 12:10:43,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:43,700 INFO L225 Difference]: With dead ends: 184 [2022-03-20 12:10:43,700 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 12:10:43,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:43,705 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 117 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 100 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 [2022-03-20 12:10:43,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 100 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 12:10:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-03-20 12:10:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.71900826446281) internal successors, (208), 121 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 211 transitions. [2022-03-20 12:10:43,715 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 211 transitions. Word has length 22 [2022-03-20 12:10:43,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:43,716 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 211 transitions. [2022-03-20 12:10:43,716 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) [2022-03-20 12:10:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 211 transitions. [2022-03-20 12:10:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:10:43,716 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:43,716 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:43,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 12:10:43,717 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:43,717 INFO L85 PathProgramCache]: Analyzing trace with hash 600944466, now seen corresponding path program 1 times [2022-03-20 12:10:43,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:43,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803656605] [2022-03-20 12:10:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:43,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:43,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803656605] [2022-03-20 12:10:43,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803656605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:43,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:43,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:43,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408016648] [2022-03-20 12:10:43,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:43,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:43,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:43,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:43,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:43,749 INFO L87 Difference]: Start difference. First operand 125 states and 211 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) [2022-03-20 12:10:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:43,813 INFO L93 Difference]: Finished difference Result 229 states and 393 transitions. [2022-03-20 12:10:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:43,813 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 [2022-03-20 12:10:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:43,815 INFO L225 Difference]: With dead ends: 229 [2022-03-20 12:10:43,815 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 12:10:43,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:43,816 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 137 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:43,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:10:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 12:10:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 169. [2022-03-20 12:10:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 165 states have (on average 1.696969696969697) internal successors, (280), 165 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 283 transitions. [2022-03-20 12:10:43,830 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 283 transitions. Word has length 22 [2022-03-20 12:10:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:43,830 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 283 transitions. [2022-03-20 12:10:43,830 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) [2022-03-20 12:10:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 283 transitions. [2022-03-20 12:10:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:10:43,831 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:43,831 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:43,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 12:10:43,831 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:43,831 INFO L85 PathProgramCache]: Analyzing trace with hash 730027185, now seen corresponding path program 1 times [2022-03-20 12:10:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:43,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938170525] [2022-03-20 12:10:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:43,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:43,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:43,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938170525] [2022-03-20 12:10:43,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938170525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:43,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:43,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:43,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185003720] [2022-03-20 12:10:43,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:43,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:43,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:43,857 INFO L87 Difference]: Start difference. First operand 169 states and 283 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) [2022-03-20 12:10:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:43,908 INFO L93 Difference]: Finished difference Result 393 states and 665 transitions. [2022-03-20 12:10:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:43,909 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 [2022-03-20 12:10:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:43,910 INFO L225 Difference]: With dead ends: 393 [2022-03-20 12:10:43,910 INFO L226 Difference]: Without dead ends: 235 [2022-03-20 12:10:43,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:43,911 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 121 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 91 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 [2022-03-20 12:10:43,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 91 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-20 12:10:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2022-03-20 12:10:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.6768558951965065) internal successors, (384), 229 states have internal predecessors, (384), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 387 transitions. [2022-03-20 12:10:43,917 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 387 transitions. Word has length 22 [2022-03-20 12:10:43,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:43,917 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 387 transitions. [2022-03-20 12:10:43,918 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) [2022-03-20 12:10:43,918 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 387 transitions. [2022-03-20 12:10:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:10:43,918 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:43,919 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:43,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 12:10:43,919 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:43,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1449441508, now seen corresponding path program 1 times [2022-03-20 12:10:43,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:43,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833076132] [2022-03-20 12:10:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:43,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:43,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:43,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833076132] [2022-03-20 12:10:43,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833076132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:43,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:43,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:43,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100565427] [2022-03-20 12:10:43,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:43,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:43,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:43,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:43,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:43,943 INFO L87 Difference]: Start difference. First operand 233 states and 387 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) [2022-03-20 12:10:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:43,994 INFO L93 Difference]: Finished difference Result 349 states and 577 transitions. [2022-03-20 12:10:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:43,994 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 [2022-03-20 12:10:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:43,995 INFO L225 Difference]: With dead ends: 349 [2022-03-20 12:10:43,995 INFO L226 Difference]: Without dead ends: 239 [2022-03-20 12:10:43,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:43,996 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 97 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 [2022-03-20 12:10:43,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 97 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-20 12:10:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2022-03-20 12:10:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 233 states have (on average 1.648068669527897) internal successors, (384), 233 states have internal predecessors, (384), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 387 transitions. [2022-03-20 12:10:44,002 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 387 transitions. Word has length 23 [2022-03-20 12:10:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:44,002 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 387 transitions. [2022-03-20 12:10:44,002 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) [2022-03-20 12:10:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 387 transitions. [2022-03-20 12:10:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:10:44,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:44,003 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:44,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 12:10:44,003 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1156038501, now seen corresponding path program 1 times [2022-03-20 12:10:44,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:44,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258540488] [2022-03-20 12:10:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:44,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:44,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:44,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258540488] [2022-03-20 12:10:44,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258540488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:44,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:44,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:44,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599974887] [2022-03-20 12:10:44,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:44,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:44,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:44,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:44,043 INFO L87 Difference]: Start difference. First operand 237 states and 387 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) [2022-03-20 12:10:44,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:44,092 INFO L93 Difference]: Finished difference Result 429 states and 713 transitions. [2022-03-20 12:10:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:44,093 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 [2022-03-20 12:10:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:44,094 INFO L225 Difference]: With dead ends: 429 [2022-03-20 12:10:44,094 INFO L226 Difference]: Without dead ends: 427 [2022-03-20 12:10:44,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:44,095 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 69 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 [2022-03-20 12:10:44,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 69 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-03-20 12:10:44,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 329. [2022-03-20 12:10:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.6123076923076922) internal successors, (524), 325 states have internal predecessors, (524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 527 transitions. [2022-03-20 12:10:44,103 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 527 transitions. Word has length 23 [2022-03-20 12:10:44,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:44,103 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 527 transitions. [2022-03-20 12:10:44,103 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) [2022-03-20 12:10:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 527 transitions. [2022-03-20 12:10:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:10:44,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:44,104 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:44,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 12:10:44,104 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1285121220, now seen corresponding path program 1 times [2022-03-20 12:10:44,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:44,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089111057] [2022-03-20 12:10:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:44,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:44,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:44,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089111057] [2022-03-20 12:10:44,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089111057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:44,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:44,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618384861] [2022-03-20 12:10:44,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:44,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:44,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:44,126 INFO L87 Difference]: Start difference. First operand 329 states and 527 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) [2022-03-20 12:10:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:44,185 INFO L93 Difference]: Finished difference Result 765 states and 1233 transitions. [2022-03-20 12:10:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:44,185 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 [2022-03-20 12:10:44,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:44,186 INFO L225 Difference]: With dead ends: 765 [2022-03-20 12:10:44,186 INFO L226 Difference]: Without dead ends: 451 [2022-03-20 12:10:44,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:44,187 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 115 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:44,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 93 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-03-20 12:10:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 449. [2022-03-20 12:10:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 445 states have (on average 1.5910112359550561) internal successors, (708), 445 states have internal predecessors, (708), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 711 transitions. [2022-03-20 12:10:44,197 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 711 transitions. Word has length 23 [2022-03-20 12:10:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:44,198 INFO L478 AbstractCegarLoop]: Abstraction has 449 states and 711 transitions. [2022-03-20 12:10:44,198 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) [2022-03-20 12:10:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 711 transitions. [2022-03-20 12:10:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 12:10:44,198 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:44,198 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:44,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 12:10:44,199 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:44,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1477487533, now seen corresponding path program 1 times [2022-03-20 12:10:44,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:44,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783112731] [2022-03-20 12:10:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:44,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:44,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783112731] [2022-03-20 12:10:44,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783112731] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:44,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:44,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:44,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232364340] [2022-03-20 12:10:44,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:44,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:44,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:44,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:44,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:44,239 INFO L87 Difference]: Start difference. First operand 449 states and 711 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) [2022-03-20 12:10:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:44,298 INFO L93 Difference]: Finished difference Result 673 states and 1061 transitions. [2022-03-20 12:10:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:44,298 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 [2022-03-20 12:10:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:44,299 INFO L225 Difference]: With dead ends: 673 [2022-03-20 12:10:44,299 INFO L226 Difference]: Without dead ends: 459 [2022-03-20 12:10:44,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:44,300 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 115 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:44,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 94 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-03-20 12:10:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2022-03-20 12:10:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 453 states have (on average 1.5629139072847682) internal successors, (708), 453 states have internal predecessors, (708), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 711 transitions. [2022-03-20 12:10:44,310 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 711 transitions. Word has length 24 [2022-03-20 12:10:44,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:44,310 INFO L478 AbstractCegarLoop]: Abstraction has 457 states and 711 transitions. [2022-03-20 12:10:44,311 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) [2022-03-20 12:10:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 711 transitions. [2022-03-20 12:10:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 12:10:44,311 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:44,311 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:44,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 12:10:44,311 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1184084526, now seen corresponding path program 1 times [2022-03-20 12:10:44,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:44,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270979388] [2022-03-20 12:10:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:44,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:44,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:44,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270979388] [2022-03-20 12:10:44,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270979388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:44,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:44,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:44,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371964143] [2022-03-20 12:10:44,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:44,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:44,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:44,333 INFO L87 Difference]: Start difference. First operand 457 states and 711 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) [2022-03-20 12:10:44,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:44,389 INFO L93 Difference]: Finished difference Result 1309 states and 2025 transitions. [2022-03-20 12:10:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:44,390 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 [2022-03-20 12:10:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:44,392 INFO L225 Difference]: With dead ends: 1309 [2022-03-20 12:10:44,392 INFO L226 Difference]: Without dead ends: 875 [2022-03-20 12:10:44,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:44,393 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 131 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:44,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 76 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-03-20 12:10:44,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2022-03-20 12:10:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 869 states have (on average 1.514384349827388) internal successors, (1316), 869 states have internal predecessors, (1316), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1319 transitions. [2022-03-20 12:10:44,412 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1319 transitions. Word has length 24 [2022-03-20 12:10:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:44,412 INFO L478 AbstractCegarLoop]: Abstraction has 873 states and 1319 transitions. [2022-03-20 12:10:44,412 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) [2022-03-20 12:10:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1319 transitions. [2022-03-20 12:10:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 12:10:44,413 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:44,413 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:44,413 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 12:10:44,413 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:44,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:44,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1055001807, now seen corresponding path program 1 times [2022-03-20 12:10:44,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:44,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181589162] [2022-03-20 12:10:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:44,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:44,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:44,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181589162] [2022-03-20 12:10:44,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181589162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:44,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:44,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:44,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764163662] [2022-03-20 12:10:44,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:44,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:44,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:44,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:44,435 INFO L87 Difference]: Start difference. First operand 873 states and 1319 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) [2022-03-20 12:10:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:44,487 INFO L93 Difference]: Finished difference Result 1037 states and 1609 transitions. [2022-03-20 12:10:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:44,488 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 [2022-03-20 12:10:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:44,490 INFO L225 Difference]: With dead ends: 1037 [2022-03-20 12:10:44,490 INFO L226 Difference]: Without dead ends: 1035 [2022-03-20 12:10:44,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:44,491 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 83 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:44,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 104 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-03-20 12:10:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 873. [2022-03-20 12:10:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 869 states have (on average 1.4959723820483315) internal successors, (1300), 869 states have internal predecessors, (1300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1303 transitions. [2022-03-20 12:10:44,509 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1303 transitions. Word has length 24 [2022-03-20 12:10:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:44,509 INFO L478 AbstractCegarLoop]: Abstraction has 873 states and 1303 transitions. [2022-03-20 12:10:44,509 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) [2022-03-20 12:10:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1303 transitions. [2022-03-20 12:10:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 12:10:44,510 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:44,510 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:44,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 12:10:44,510 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1948052864, now seen corresponding path program 1 times [2022-03-20 12:10:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:44,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539843202] [2022-03-20 12:10:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539843202] [2022-03-20 12:10:44,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539843202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:44,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:44,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:44,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228078315] [2022-03-20 12:10:44,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:44,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:44,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:44,531 INFO L87 Difference]: Start difference. First operand 873 states and 1303 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) [2022-03-20 12:10:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:44,588 INFO L93 Difference]: Finished difference Result 1533 states and 2329 transitions. [2022-03-20 12:10:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:44,588 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 [2022-03-20 12:10:44,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:44,592 INFO L225 Difference]: With dead ends: 1533 [2022-03-20 12:10:44,592 INFO L226 Difference]: Without dead ends: 1531 [2022-03-20 12:10:44,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:44,593 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 67 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 [2022-03-20 12:10:44,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 67 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2022-03-20 12:10:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1273. [2022-03-20 12:10:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1269 states have (on average 1.4531126871552404) internal successors, (1844), 1269 states have internal predecessors, (1844), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1847 transitions. [2022-03-20 12:10:44,617 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1847 transitions. Word has length 25 [2022-03-20 12:10:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:44,617 INFO L478 AbstractCegarLoop]: Abstraction has 1273 states and 1847 transitions. [2022-03-20 12:10:44,617 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) [2022-03-20 12:10:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1847 transitions. [2022-03-20 12:10:44,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 12:10:44,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:44,619 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:44,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 12:10:44,619 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:44,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1818970145, now seen corresponding path program 1 times [2022-03-20 12:10:44,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:44,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024134906] [2022-03-20 12:10:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:44,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:44,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:44,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024134906] [2022-03-20 12:10:44,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024134906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:44,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:44,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:44,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795756807] [2022-03-20 12:10:44,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:44,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:44,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:44,639 INFO L87 Difference]: Start difference. First operand 1273 states and 1847 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) [2022-03-20 12:10:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:44,702 INFO L93 Difference]: Finished difference Result 2941 states and 4281 transitions. [2022-03-20 12:10:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:44,702 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 [2022-03-20 12:10:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:44,706 INFO L225 Difference]: With dead ends: 2941 [2022-03-20 12:10:44,706 INFO L226 Difference]: Without dead ends: 1691 [2022-03-20 12:10:44,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:44,708 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 103 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:44,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 97 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-03-20 12:10:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1689. [2022-03-20 12:10:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1685 states have (on average 1.426706231454006) internal successors, (2404), 1685 states have internal predecessors, (2404), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2407 transitions. [2022-03-20 12:10:44,743 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2407 transitions. Word has length 25 [2022-03-20 12:10:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:44,743 INFO L478 AbstractCegarLoop]: Abstraction has 1689 states and 2407 transitions. [2022-03-20 12:10:44,743 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) [2022-03-20 12:10:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2407 transitions. [2022-03-20 12:10:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:10:44,745 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:44,745 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:44,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 12:10:44,745 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:44,745 INFO L85 PathProgramCache]: Analyzing trace with hash -260064022, now seen corresponding path program 1 times [2022-03-20 12:10:44,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:44,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985716177] [2022-03-20 12:10:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:44,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:44,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:44,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985716177] [2022-03-20 12:10:44,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985716177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:44,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:44,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:44,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592150241] [2022-03-20 12:10:44,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:44,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:44,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:44,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:44,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:44,765 INFO L87 Difference]: Start difference. First operand 1689 states and 2407 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:44,838 INFO L93 Difference]: Finished difference Result 2557 states and 3641 transitions. [2022-03-20 12:10:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:44,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 12:10:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:44,842 INFO L225 Difference]: With dead ends: 2557 [2022-03-20 12:10:44,842 INFO L226 Difference]: Without dead ends: 1739 [2022-03-20 12:10:44,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:44,843 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 113 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:44,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 88 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-03-20 12:10:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1737. [2022-03-20 12:10:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1733 states have (on average 1.4056549336410848) internal successors, (2436), 1733 states have internal predecessors, (2436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2439 transitions. [2022-03-20 12:10:44,874 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2439 transitions. Word has length 26 [2022-03-20 12:10:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:44,874 INFO L478 AbstractCegarLoop]: Abstraction has 1737 states and 2439 transitions. [2022-03-20 12:10:44,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2439 transitions. [2022-03-20 12:10:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:10:44,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:44,875 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:44,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 12:10:44,876 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:44,876 INFO L85 PathProgramCache]: Analyzing trace with hash -553467029, now seen corresponding path program 1 times [2022-03-20 12:10:44,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:44,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186823877] [2022-03-20 12:10:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:44,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:44,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:44,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186823877] [2022-03-20 12:10:44,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186823877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:44,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:44,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:44,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500403459] [2022-03-20 12:10:44,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:44,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:44,895 INFO L87 Difference]: Start difference. First operand 1737 states and 2439 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:44,959 INFO L93 Difference]: Finished difference Result 2957 states and 4201 transitions. [2022-03-20 12:10:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:44,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 12:10:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:44,966 INFO L225 Difference]: With dead ends: 2957 [2022-03-20 12:10:44,966 INFO L226 Difference]: Without dead ends: 2955 [2022-03-20 12:10:44,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:44,967 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:44,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 66 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-03-20 12:10:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2569. [2022-03-20 12:10:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 2565 states have (on average 1.3614035087719298) internal successors, (3492), 2565 states have internal predecessors, (3492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 3495 transitions. [2022-03-20 12:10:45,012 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 3495 transitions. Word has length 26 [2022-03-20 12:10:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:45,012 INFO L478 AbstractCegarLoop]: Abstraction has 2569 states and 3495 transitions. [2022-03-20 12:10:45,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 3495 transitions. [2022-03-20 12:10:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:10:45,014 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:45,014 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:45,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 12:10:45,014 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:45,015 INFO L85 PathProgramCache]: Analyzing trace with hash -424384310, now seen corresponding path program 1 times [2022-03-20 12:10:45,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:45,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051806752] [2022-03-20 12:10:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:45,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:45,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:45,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:45,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051806752] [2022-03-20 12:10:45,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051806752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:45,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:45,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:45,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587408977] [2022-03-20 12:10:45,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:45,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:45,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:45,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:45,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:45,033 INFO L87 Difference]: Start difference. First operand 2569 states and 3495 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:45,108 INFO L93 Difference]: Finished difference Result 5837 states and 7913 transitions. [2022-03-20 12:10:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:45,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 12:10:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:45,116 INFO L225 Difference]: With dead ends: 5837 [2022-03-20 12:10:45,116 INFO L226 Difference]: Without dead ends: 3339 [2022-03-20 12:10:45,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:45,119 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 97 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:45,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 99 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-03-20 12:10:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3337. [2022-03-20 12:10:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3333 states have (on average 1.326132613261326) internal successors, (4420), 3333 states have internal predecessors, (4420), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 4423 transitions. [2022-03-20 12:10:45,177 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 4423 transitions. Word has length 26 [2022-03-20 12:10:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:45,177 INFO L478 AbstractCegarLoop]: Abstraction has 3337 states and 4423 transitions. [2022-03-20 12:10:45,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 4423 transitions. [2022-03-20 12:10:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:10:45,179 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:45,179 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:45,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 12:10:45,180 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash 22424027, now seen corresponding path program 1 times [2022-03-20 12:10:45,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:45,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261162868] [2022-03-20 12:10:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:45,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:45,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:45,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:45,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261162868] [2022-03-20 12:10:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261162868] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:45,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:45,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078967785] [2022-03-20 12:10:45,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:45,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:45,215 INFO L87 Difference]: Start difference. First operand 3337 states and 4423 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:45,290 INFO L93 Difference]: Finished difference Result 5005 states and 6601 transitions. [2022-03-20 12:10:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:45,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 12:10:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:45,297 INFO L225 Difference]: With dead ends: 5005 [2022-03-20 12:10:45,298 INFO L226 Difference]: Without dead ends: 3403 [2022-03-20 12:10:45,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:45,300 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:45,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 85 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2022-03-20 12:10:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3401. [2022-03-20 12:10:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3397 states have (on average 1.3011480718280837) internal successors, (4420), 3397 states have internal predecessors, (4420), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 4423 transitions. [2022-03-20 12:10:45,367 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 4423 transitions. Word has length 27 [2022-03-20 12:10:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:45,367 INFO L478 AbstractCegarLoop]: Abstraction has 3401 states and 4423 transitions. [2022-03-20 12:10:45,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 4423 transitions. [2022-03-20 12:10:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:10:45,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:45,369 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:45,369 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 12:10:45,369 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:45,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash -270978980, now seen corresponding path program 1 times [2022-03-20 12:10:45,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:45,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010268181] [2022-03-20 12:10:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:45,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:45,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:45,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:45,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010268181] [2022-03-20 12:10:45,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010268181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:45,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:45,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:45,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810162137] [2022-03-20 12:10:45,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:45,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:45,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:45,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:45,389 INFO L87 Difference]: Start difference. First operand 3401 states and 4423 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:45,474 INFO L93 Difference]: Finished difference Result 5645 states and 7369 transitions. [2022-03-20 12:10:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 12:10:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:45,486 INFO L225 Difference]: With dead ends: 5645 [2022-03-20 12:10:45,486 INFO L226 Difference]: Without dead ends: 5643 [2022-03-20 12:10:45,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:45,488 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 102 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:45,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 65 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:45,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2022-03-20 12:10:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5129. [2022-03-20 12:10:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5129 states, 5125 states have (on average 1.2620487804878049) internal successors, (6468), 5125 states have internal predecessors, (6468), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 6471 transitions. [2022-03-20 12:10:45,566 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 6471 transitions. Word has length 27 [2022-03-20 12:10:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:45,566 INFO L478 AbstractCegarLoop]: Abstraction has 5129 states and 6471 transitions. [2022-03-20 12:10:45,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 6471 transitions. [2022-03-20 12:10:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:10:45,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:45,572 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:45,572 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 12:10:45,572 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash -141896261, now seen corresponding path program 1 times [2022-03-20 12:10:45,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:45,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992184141] [2022-03-20 12:10:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:45,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:45,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:45,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:45,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992184141] [2022-03-20 12:10:45,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992184141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:45,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:45,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:45,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172912542] [2022-03-20 12:10:45,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:45,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:45,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:45,601 INFO L87 Difference]: Start difference. First operand 5129 states and 6471 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:45,724 INFO L93 Difference]: Finished difference Result 11533 states and 14409 transitions. [2022-03-20 12:10:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:45,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 12:10:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:45,745 INFO L225 Difference]: With dead ends: 11533 [2022-03-20 12:10:45,745 INFO L226 Difference]: Without dead ends: 6539 [2022-03-20 12:10:45,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:45,752 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 91 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:45,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 101 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:45,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2022-03-20 12:10:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6537. [2022-03-20 12:10:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6537 states, 6533 states have (on average 1.2153681310270932) internal successors, (7940), 6533 states have internal predecessors, (7940), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6537 states to 6537 states and 7943 transitions. [2022-03-20 12:10:45,871 INFO L78 Accepts]: Start accepts. Automaton has 6537 states and 7943 transitions. Word has length 27 [2022-03-20 12:10:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:45,871 INFO L478 AbstractCegarLoop]: Abstraction has 6537 states and 7943 transitions. [2022-03-20 12:10:45,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 6537 states and 7943 transitions. [2022-03-20 12:10:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:10:45,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:45,877 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:45,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 12:10:45,877 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:45,877 INFO L85 PathProgramCache]: Analyzing trace with hash 189619078, now seen corresponding path program 1 times [2022-03-20 12:10:45,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:45,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416398782] [2022-03-20 12:10:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:45,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:45,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:45,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:45,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416398782] [2022-03-20 12:10:45,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416398782] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:45,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:45,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:45,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549994303] [2022-03-20 12:10:45,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:45,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:45,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:45,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:45,896 INFO L87 Difference]: Start difference. First operand 6537 states and 7943 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:45,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:45,991 INFO L93 Difference]: Finished difference Result 9805 states and 11849 transitions. [2022-03-20 12:10:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:45,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 12:10:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:45,999 INFO L225 Difference]: With dead ends: 9805 [2022-03-20 12:10:45,999 INFO L226 Difference]: Without dead ends: 6667 [2022-03-20 12:10:46,003 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:46,004 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 111 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:46,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 82 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2022-03-20 12:10:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6665. [2022-03-20 12:10:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6661 states have (on average 1.1920132112295452) internal successors, (7940), 6661 states have internal predecessors, (7940), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 7943 transitions. [2022-03-20 12:10:46,129 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 7943 transitions. Word has length 28 [2022-03-20 12:10:46,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:46,129 INFO L478 AbstractCegarLoop]: Abstraction has 6665 states and 7943 transitions. [2022-03-20 12:10:46,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 7943 transitions. [2022-03-20 12:10:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:10:46,133 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:46,133 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:46,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 12:10:46,134 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:46,134 INFO L85 PathProgramCache]: Analyzing trace with hash -103783929, now seen corresponding path program 1 times [2022-03-20 12:10:46,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:46,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261828076] [2022-03-20 12:10:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:46,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:46,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:46,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261828076] [2022-03-20 12:10:46,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261828076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:46,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:46,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661547944] [2022-03-20 12:10:46,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:46,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:46,160 INFO L87 Difference]: Start difference. First operand 6665 states and 7943 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:46,279 INFO L93 Difference]: Finished difference Result 10763 states and 12680 transitions. [2022-03-20 12:10:46,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:46,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 12:10:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:46,290 INFO L225 Difference]: With dead ends: 10763 [2022-03-20 12:10:46,290 INFO L226 Difference]: Without dead ends: 10761 [2022-03-20 12:10:46,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:46,294 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:46,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 63 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:46,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10761 states. [2022-03-20 12:10:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10761 to 10249. [2022-03-20 12:10:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10249 states, 10245 states have (on average 1.16232308443143) internal successors, (11908), 10245 states have internal predecessors, (11908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10249 states to 10249 states and 11911 transitions. [2022-03-20 12:10:46,455 INFO L78 Accepts]: Start accepts. Automaton has 10249 states and 11911 transitions. Word has length 28 [2022-03-20 12:10:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:46,455 INFO L478 AbstractCegarLoop]: Abstraction has 10249 states and 11911 transitions. [2022-03-20 12:10:46,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 10249 states and 11911 transitions. [2022-03-20 12:10:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:10:46,464 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:46,464 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:46,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 12:10:46,464 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:46,464 INFO L85 PathProgramCache]: Analyzing trace with hash 25298790, now seen corresponding path program 1 times [2022-03-20 12:10:46,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:46,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073343490] [2022-03-20 12:10:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:46,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:46,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:46,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:46,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073343490] [2022-03-20 12:10:46,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073343490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:46,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:46,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:46,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835915944] [2022-03-20 12:10:46,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:46,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:46,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:46,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:46,483 INFO L87 Difference]: Start difference. First operand 10249 states and 11911 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:46,634 INFO L93 Difference]: Finished difference Result 22793 states and 25991 transitions. [2022-03-20 12:10:46,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:46,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 12:10:46,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:46,635 INFO L225 Difference]: With dead ends: 22793 [2022-03-20 12:10:46,635 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 12:10:46,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:10:46,709 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 82 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:46,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 102 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 12:10:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 12:10:46,710 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) [2022-03-20 12:10:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 12:10:46,710 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2022-03-20 12:10:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:46,711 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 12:10:46,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:10:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 12:10:46,711 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 12:10:46,713 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 12:10:46,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 12:10:46,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 12:11:30,571 WARN L232 SmtUtils]: Spent 43.85s on a formula simplification that was a NOOP. DAG size: 2098 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-20 12:11:30,643 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 12:11:30,643 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 12:11:30,643 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 12:11:30,643 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 12:11:30,643 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 12:11:30,643 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 12:11:30,643 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 6 151) the Hoare annotation is: true [2022-03-20 12:11:30,644 INFO L885 garLoopResultBuilder]: At program point L141-1(lines 38 146) the Hoare annotation is: true [2022-03-20 12:11:30,644 INFO L885 garLoopResultBuilder]: At program point L147(lines 7 151) the Hoare annotation is: true [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 6 151) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point L63(lines 63 65) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 6 151) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point L63-2(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point L67-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point L71-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point L75-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point L79-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point L83-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point L87-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,644 INFO L882 garLoopResultBuilder]: For program point L91-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,645 INFO L882 garLoopResultBuilder]: For program point L95-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,645 INFO L882 garLoopResultBuilder]: For program point L102(line 102) no Hoare annotation was computed. [2022-03-20 12:11:30,645 INFO L882 garLoopResultBuilder]: For program point L101-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,645 INFO L878 garLoopResultBuilder]: At program point L142-1(lines 7 151) the Hoare annotation is: false [2022-03-20 12:11:30,645 INFO L882 garLoopResultBuilder]: For program point L107(line 107) no Hoare annotation was computed. [2022-03-20 12:11:30,645 INFO L882 garLoopResultBuilder]: For program point L106-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,645 INFO L882 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 149) no Hoare annotation was computed. [2022-03-20 12:11:30,645 INFO L882 garLoopResultBuilder]: For program point L112(line 112) no Hoare annotation was computed. [2022-03-20 12:11:30,645 INFO L882 garLoopResultBuilder]: For program point L111-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,645 INFO L882 garLoopResultBuilder]: For program point L117(line 117) no Hoare annotation was computed. [2022-03-20 12:11:30,645 INFO L882 garLoopResultBuilder]: For program point L116-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,646 INFO L882 garLoopResultBuilder]: For program point L122(line 122) no Hoare annotation was computed. [2022-03-20 12:11:30,646 INFO L882 garLoopResultBuilder]: For program point L121-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,646 INFO L882 garLoopResultBuilder]: For program point L127(line 127) no Hoare annotation was computed. [2022-03-20 12:11:30,646 INFO L882 garLoopResultBuilder]: For program point L126-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,646 INFO L882 garLoopResultBuilder]: For program point L132(line 132) no Hoare annotation was computed. [2022-03-20 12:11:30,646 INFO L882 garLoopResultBuilder]: For program point L131-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,646 INFO L882 garLoopResultBuilder]: For program point L137(line 137) no Hoare annotation was computed. [2022-03-20 12:11:30,646 INFO L882 garLoopResultBuilder]: For program point L136-1(lines 38 146) no Hoare annotation was computed. [2022-03-20 12:11:30,646 INFO L882 garLoopResultBuilder]: For program point L142(line 142) no Hoare annotation was computed. [2022-03-20 12:11:30,649 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:11:30,650 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 12:11:30,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:11:30 BasicIcfg [2022-03-20 12:11:30,657 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 12:11:30,658 INFO L158 Benchmark]: Toolchain (without parser) took 48620.28ms. Allocated memory was 194.0MB in the beginning and 722.5MB in the end (delta: 528.5MB). Free memory was 139.1MB in the beginning and 484.9MB in the end (delta: -345.7MB). Peak memory consumption was 435.0MB. Max. memory is 8.0GB. [2022-03-20 12:11:30,658 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 194.0MB. Free memory is still 155.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 12:11:30,658 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.42ms. Allocated memory was 194.0MB in the beginning and 291.5MB in the end (delta: 97.5MB). Free memory was 138.9MB in the beginning and 263.0MB in the end (delta: -124.1MB). Peak memory consumption was 7.6MB. Max. memory is 8.0GB. [2022-03-20 12:11:30,658 INFO L158 Benchmark]: Boogie Preprocessor took 18.94ms. Allocated memory is still 291.5MB. Free memory was 263.0MB in the beginning and 261.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 12:11:30,658 INFO L158 Benchmark]: RCFGBuilder took 314.74ms. Allocated memory is still 291.5MB. Free memory was 261.3MB in the beginning and 249.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 12:11:30,659 INFO L158 Benchmark]: IcfgTransformer took 15.06ms. Allocated memory is still 291.5MB. Free memory was 249.2MB in the beginning and 247.9MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 12:11:30,659 INFO L158 Benchmark]: TraceAbstraction took 47990.36ms. Allocated memory was 291.5MB in the beginning and 722.5MB in the end (delta: 431.0MB). Free memory was 247.1MB in the beginning and 484.9MB in the end (delta: -237.7MB). Peak memory consumption was 445.2MB. Max. memory is 8.0GB. [2022-03-20 12:11:30,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 194.0MB. Free memory is still 155.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 266.42ms. Allocated memory was 194.0MB in the beginning and 291.5MB in the end (delta: 97.5MB). Free memory was 138.9MB in the beginning and 263.0MB in the end (delta: -124.1MB). Peak memory consumption was 7.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.94ms. Allocated memory is still 291.5MB. Free memory was 263.0MB in the beginning and 261.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 314.74ms. Allocated memory is still 291.5MB. Free memory was 261.3MB in the beginning and 249.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 15.06ms. Allocated memory is still 291.5MB. Free memory was 249.2MB in the beginning and 247.9MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 47990.36ms. Allocated memory was 291.5MB in the beginning and 722.5MB in the end (delta: 431.0MB). Free memory was 247.1MB in the beginning and 484.9MB in the end (delta: -237.7MB). Peak memory consumption was 445.2MB. 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: 149]: 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, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 47.9s, OverallIterations: 25, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 43.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2874 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2874 mSDsluCounter, 2142 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 177 mSDsCounter, 59 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1370 IncrementalHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 59 mSolverCounterUnsat, 1965 mSDtfsCounter, 1370 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10249occurred in iteration=24, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 13 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 43.9s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 603 NumberOfCodeBlocks, 603 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 578 ConstructedInterpolants, 0 QuantifiedInterpolants, 1259 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-03-20 12:11:30,693 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...