/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_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:10:25,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:10:25,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:10:26,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 12:10:26,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 12:10:26,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 12:10:26,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 12:10:26,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 12:10:26,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 12:10:26,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 12:10:26,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 12:10:26,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 12:10:26,013 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 12:10:26,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 12:10:26,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 12:10:26,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 12:10:26,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 12:10:26,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 12:10:26,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:10:26,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:10:26,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:10:26,024 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 12:10:26,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:10:26,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:10:26,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 12:10:26,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 12:10:26,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 12:10:26,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 12:10:26,049 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 12:10:26,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:10:26,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:10:26,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:10:26,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:10:26,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:10:26,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:10:26,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:10:26,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:10:26,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:10:26,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:10:26,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:10:26,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:10:26,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:10:26,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:10:26,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 12:10:26,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 12:10:26,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 12:10:26,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 12:10:26,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:10:26,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 12:10:26,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 12:10:26,052 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 12:10:26,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:10:26,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:10:26,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:10:26,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:10:26,242 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:10:26,253 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:10:26,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2022-03-20 12:10:26,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bb646bf7/c7fc72ed24094caabe505b486e28c669/FLAG9c1e57910 [2022-03-20 12:10:26,708 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:10:26,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2022-03-20 12:10:26,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bb646bf7/c7fc72ed24094caabe505b486e28c669/FLAG9c1e57910 [2022-03-20 12:10:26,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bb646bf7/c7fc72ed24094caabe505b486e28c669 [2022-03-20 12:10:26,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:10:26,752 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 12:10:26,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:10:26,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:10:26,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:10:26,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:10:26" (1/1) ... [2022-03-20 12:10:26,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3abb6531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26, skipping insertion in model container [2022-03-20 12:10:26,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:10:26" (1/1) ... [2022-03-20 12:10:26,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:10:26,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:10:26,920 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_5.c[2207,2220] [2022-03-20 12:10:26,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:10:26,933 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:10:26,965 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_5.c[2207,2220] [2022-03-20 12:10:26,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:10:26,980 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:10:26,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26 WrapperNode [2022-03-20 12:10:26,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:10:26,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:10:26,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:10:26,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:10:27,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26" (1/1) ... [2022-03-20 12:10:27,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26" (1/1) ... [2022-03-20 12:10:27,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26" (1/1) ... [2022-03-20 12:10:27,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26" (1/1) ... [2022-03-20 12:10:27,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26" (1/1) ... [2022-03-20 12:10:27,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26" (1/1) ... [2022-03-20 12:10:27,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26" (1/1) ... [2022-03-20 12:10:27,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:10:27,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:10:27,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:10:27,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:10:27,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26" (1/1) ... [2022-03-20 12:10:27,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:10:27,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:10:27,080 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 12:10:27,082 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 12:10:27,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:10:27,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:10:27,110 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:10:27,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:10:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:10:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:10:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:10:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:10:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:10:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:10:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:10:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:10:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:10:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:10:27,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:10:27,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:10:27,160 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:10:27,161 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:10:27,255 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:10:27,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:10:27,259 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 12:10:27,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:27 BoogieIcfgContainer [2022-03-20 12:10:27,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:10:27,261 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 12:10:27,261 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 12:10:27,262 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 12:10:27,264 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:27" (1/1) ... [2022-03-20 12:10:27,265 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 12:10:27,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 12:10:27 BasicIcfg [2022-03-20 12:10:27,291 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 12:10:27,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:10:27,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:10:27,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:10:27,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:10:26" (1/4) ... [2022-03-20 12:10:27,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7956e1de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:10:27, skipping insertion in model container [2022-03-20 12:10:27,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:10:26" (2/4) ... [2022-03-20 12:10:27,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7956e1de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:10:27, skipping insertion in model container [2022-03-20 12:10:27,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:10:27" (3/4) ... [2022-03-20 12:10:27,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7956e1de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:10:27, skipping insertion in model container [2022-03-20 12:10:27,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 12:10:27" (4/4) ... [2022-03-20 12:10:27,295 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.cqvasr [2022-03-20 12:10:27,298 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:10:27,298 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:10:27,353 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:10:27,357 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 12:10:27,357 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:10:27,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 25 states have internal predecessors, (43), 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 12:10:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 12:10:27,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:27,370 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:27,370 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:27,374 INFO L85 PathProgramCache]: Analyzing trace with hash -655326661, now seen corresponding path program 1 times [2022-03-20 12:10:27,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:27,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162600279] [2022-03-20 12:10:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:27,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:27,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:27,493 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 12:10:27,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162600279] [2022-03-20 12:10:27,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162600279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:27,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:27,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:27,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562661454] [2022-03-20 12:10:27,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:27,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:27,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:27,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:27,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:27,518 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 25 states have internal predecessors, (43), 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 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states 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 12:10:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:27,588 INFO L93 Difference]: Finished difference Result 58 states and 91 transitions. [2022-03-20 12:10:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:27,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 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 16 [2022-03-20 12:10:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:27,596 INFO L225 Difference]: With dead ends: 58 [2022-03-20 12:10:27,596 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 12:10:27,598 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 12:10:27,603 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 89 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:27,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 59 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 12:10:27,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2022-03-20 12:10:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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 12:10:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 50 transitions. [2022-03-20 12:10:27,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 50 transitions. Word has length 16 [2022-03-20 12:10:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:27,638 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 50 transitions. [2022-03-20 12:10:27,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states 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 12:10:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 50 transitions. [2022-03-20 12:10:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 12:10:27,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:27,640 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:27,640 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:10:27,640 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:27,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1087483674, now seen corresponding path program 1 times [2022-03-20 12:10:27,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:27,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345997627] [2022-03-20 12:10:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:27,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:27,723 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 12:10:27,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:27,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345997627] [2022-03-20 12:10:27,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345997627] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:27,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:27,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:27,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348941409] [2022-03-20 12:10:27,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:27,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:27,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:27,726 INFO L87 Difference]: Start difference. First operand 31 states and 50 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states 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 12:10:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:27,788 INFO L93 Difference]: Finished difference Result 68 states and 113 transitions. [2022-03-20 12:10:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:27,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 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 16 [2022-03-20 12:10:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:27,789 INFO L225 Difference]: With dead ends: 68 [2022-03-20 12:10:27,790 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 12:10:27,794 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 12:10:27,795 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 73 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:27,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 55 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:27,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 12:10:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-03-20 12:10:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 37 states have internal predecessors, (63), 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 12:10:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 66 transitions. [2022-03-20 12:10:27,806 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 66 transitions. Word has length 16 [2022-03-20 12:10:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:27,809 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 66 transitions. [2022-03-20 12:10:27,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states 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 12:10:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 66 transitions. [2022-03-20 12:10:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 12:10:27,810 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:27,810 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:27,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:10:27,810 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:27,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1159741911, now seen corresponding path program 1 times [2022-03-20 12:10:27,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:27,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221966696] [2022-03-20 12:10:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:27,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:27,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:27,860 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 12:10:27,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:27,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221966696] [2022-03-20 12:10:27,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221966696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:27,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:27,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:27,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130755045] [2022-03-20 12:10:27,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:27,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:27,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:27,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:27,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:27,862 INFO L87 Difference]: Start difference. First operand 41 states and 66 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states 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 12:10:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:27,915 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2022-03-20 12:10:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:27,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 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 17 [2022-03-20 12:10:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:27,917 INFO L225 Difference]: With dead ends: 64 [2022-03-20 12:10:27,917 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 12:10:27,917 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 12:10:27,918 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:27,918 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 63 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 12:10:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-03-20 12:10:27,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 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 12:10:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 68 transitions. [2022-03-20 12:10:27,923 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 68 transitions. Word has length 17 [2022-03-20 12:10:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:27,923 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 68 transitions. [2022-03-20 12:10:27,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states 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 12:10:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 68 transitions. [2022-03-20 12:10:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 12:10:27,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:27,924 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:27,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 12:10:27,924 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash -647712552, now seen corresponding path program 1 times [2022-03-20 12:10:27,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:27,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880979945] [2022-03-20 12:10:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:27,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,040 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 12:10:28,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:28,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880979945] [2022-03-20 12:10:28,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880979945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:28,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:28,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:28,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066957847] [2022-03-20 12:10:28,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:28,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:28,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:28,042 INFO L87 Difference]: Start difference. First operand 44 states and 68 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states 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 12:10:28,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:28,093 INFO L93 Difference]: Finished difference Result 77 states and 121 transitions. [2022-03-20 12:10:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:28,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 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 17 [2022-03-20 12:10:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:28,095 INFO L225 Difference]: With dead ends: 77 [2022-03-20 12:10:28,095 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 12:10:28,095 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 12:10:28,096 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 76 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 47 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 12:10:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 57. [2022-03-20 12:10:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 53 states have internal predecessors, (86), 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 12:10:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 89 transitions. [2022-03-20 12:10:28,102 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 89 transitions. Word has length 17 [2022-03-20 12:10:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,102 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 89 transitions. [2022-03-20 12:10:28,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states 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 12:10:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 89 transitions. [2022-03-20 12:10:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 12:10:28,103 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:28,103 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:28,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 12:10:28,103 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:28,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1095097783, now seen corresponding path program 1 times [2022-03-20 12:10:28,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:28,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779916477] [2022-03-20 12:10:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:28,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:28,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:28,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779916477] [2022-03-20 12:10:28,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779916477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:28,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:28,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:28,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733613603] [2022-03-20 12:10:28,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:28,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:28,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:28,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:28,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:28,161 INFO L87 Difference]: Start difference. First operand 57 states and 89 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states 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 12:10:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:28,204 INFO L93 Difference]: Finished difference Result 125 states and 199 transitions. [2022-03-20 12:10:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:28,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 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 17 [2022-03-20 12:10:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:28,205 INFO L225 Difference]: With dead ends: 125 [2022-03-20 12:10:28,206 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 12:10:28,206 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 12:10:28,207 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 67 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 57 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 12:10:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-20 12:10:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.5774647887323943) internal successors, (112), 71 states have internal predecessors, (112), 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 12:10:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2022-03-20 12:10:28,223 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 17 [2022-03-20 12:10:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,223 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2022-03-20 12:10:28,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states 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 12:10:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2022-03-20 12:10:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 12:10:28,224 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:28,224 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:28,224 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 12:10:28,224 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1395779414, now seen corresponding path program 1 times [2022-03-20 12:10:28,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:28,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036038215] [2022-03-20 12:10:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:28,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,254 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 12:10:28,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:28,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036038215] [2022-03-20 12:10:28,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036038215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:28,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:28,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:28,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553789811] [2022-03-20 12:10:28,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:28,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:28,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:28,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:28,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:28,257 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states 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 12:10:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:28,297 INFO L93 Difference]: Finished difference Result 112 states and 170 transitions. [2022-03-20 12:10:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:28,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 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 18 [2022-03-20 12:10:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:28,298 INFO L225 Difference]: With dead ends: 112 [2022-03-20 12:10:28,298 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 12:10:28,299 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 12:10:28,299 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 65 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 60 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 12:10:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-03-20 12:10:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 states have internal predecessors, (112), 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 12:10:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 115 transitions. [2022-03-20 12:10:28,305 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 115 transitions. Word has length 18 [2022-03-20 12:10:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,305 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 115 transitions. [2022-03-20 12:10:28,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states 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 12:10:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 115 transitions. [2022-03-20 12:10:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 12:10:28,306 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:28,306 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:28,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 12:10:28,306 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:28,306 INFO L85 PathProgramCache]: Analyzing trace with hash -411675049, now seen corresponding path program 1 times [2022-03-20 12:10:28,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:28,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125824889] [2022-03-20 12:10:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:28,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,338 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 12:10:28,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:28,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125824889] [2022-03-20 12:10:28,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125824889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:28,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:28,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:28,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688138185] [2022-03-20 12:10:28,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:28,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:28,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:28,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:28,340 INFO L87 Difference]: Start difference. First operand 77 states and 115 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states 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 12:10:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:28,374 INFO L93 Difference]: Finished difference Result 133 states and 201 transitions. [2022-03-20 12:10:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:28,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 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 18 [2022-03-20 12:10:28,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:28,375 INFO L225 Difference]: With dead ends: 133 [2022-03-20 12:10:28,375 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 12:10:28,375 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 12:10:28,376 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 69 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 46 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 12:10:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 105. [2022-03-20 12:10:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.504950495049505) internal successors, (152), 101 states have internal predecessors, (152), 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 12:10:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 155 transitions. [2022-03-20 12:10:28,383 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 155 transitions. Word has length 18 [2022-03-20 12:10:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,383 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 155 transitions. [2022-03-20 12:10:28,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states 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 12:10:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 155 transitions. [2022-03-20 12:10:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 12:10:28,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:28,384 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:28,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 12:10:28,384 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:28,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1331135286, now seen corresponding path program 1 times [2022-03-20 12:10:28,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:28,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327886439] [2022-03-20 12:10:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:28,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:10:28,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:28,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327886439] [2022-03-20 12:10:28,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327886439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:28,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:28,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:28,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928523013] [2022-03-20 12:10:28,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:28,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:28,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:28,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:28,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:28,407 INFO L87 Difference]: Start difference. First operand 105 states and 155 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states 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 12:10:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:28,448 INFO L93 Difference]: Finished difference Result 233 states and 345 transitions. [2022-03-20 12:10:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:28,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 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 18 [2022-03-20 12:10:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:28,450 INFO L225 Difference]: With dead ends: 233 [2022-03-20 12:10:28,450 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 12:10:28,450 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 12:10:28,451 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 61 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 59 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 12:10:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-03-20 12:10:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 133 states have (on average 1.443609022556391) internal successors, (192), 133 states have internal predecessors, (192), 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 12:10:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 195 transitions. [2022-03-20 12:10:28,478 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 195 transitions. Word has length 18 [2022-03-20 12:10:28,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,478 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 195 transitions. [2022-03-20 12:10:28,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states 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 12:10:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 195 transitions. [2022-03-20 12:10:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 12:10:28,479 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:28,479 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:28,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 12:10:28,480 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash 123007539, now seen corresponding path program 1 times [2022-03-20 12:10:28,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:28,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360302278] [2022-03-20 12:10:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:28,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,523 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 12:10:28,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:28,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360302278] [2022-03-20 12:10:28,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360302278] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:28,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:28,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:28,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319921074] [2022-03-20 12:10:28,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:28,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:28,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:28,524 INFO L87 Difference]: Start difference. First operand 137 states and 195 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states 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 12:10:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:28,587 INFO L93 Difference]: Finished difference Result 205 states and 289 transitions. [2022-03-20 12:10:28,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:28,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 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 19 [2022-03-20 12:10:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:28,589 INFO L225 Difference]: With dead ends: 205 [2022-03-20 12:10:28,589 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 12:10:28,589 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 12:10:28,590 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 57 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 12:10:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-03-20 12:10:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.4014598540145986) internal successors, (192), 137 states have internal predecessors, (192), 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 12:10:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 195 transitions. [2022-03-20 12:10:28,596 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 195 transitions. Word has length 19 [2022-03-20 12:10:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,596 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 195 transitions. [2022-03-20 12:10:28,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states 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 12:10:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 195 transitions. [2022-03-20 12:10:28,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 12:10:28,597 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:28,597 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:28,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 12:10:28,598 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:28,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1684446924, now seen corresponding path program 1 times [2022-03-20 12:10:28,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:28,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402656019] [2022-03-20 12:10:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:28,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,629 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 12:10:28,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:28,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402656019] [2022-03-20 12:10:28,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402656019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:28,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:28,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:28,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206265742] [2022-03-20 12:10:28,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:28,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:28,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:28,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:28,630 INFO L87 Difference]: Start difference. First operand 141 states and 195 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states 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 12:10:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:28,671 INFO L93 Difference]: Finished difference Result 237 states and 329 transitions. [2022-03-20 12:10:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:28,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 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 19 [2022-03-20 12:10:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:28,673 INFO L225 Difference]: With dead ends: 237 [2022-03-20 12:10:28,673 INFO L226 Difference]: Without dead ends: 235 [2022-03-20 12:10:28,673 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 12:10:28,675 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 45 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:28,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-20 12:10:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 201. [2022-03-20 12:10:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.3604060913705585) internal successors, (268), 197 states have internal predecessors, (268), 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 12:10:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 271 transitions. [2022-03-20 12:10:28,697 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 271 transitions. Word has length 19 [2022-03-20 12:10:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,697 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 271 transitions. [2022-03-20 12:10:28,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states 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 12:10:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 271 transitions. [2022-03-20 12:10:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 12:10:28,698 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:28,698 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:28,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 12:10:28,699 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash 58363411, now seen corresponding path program 1 times [2022-03-20 12:10:28,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:28,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461659719] [2022-03-20 12:10:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:28,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,741 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 12:10:28,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:28,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461659719] [2022-03-20 12:10:28,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461659719] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:28,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:28,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:28,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497250164] [2022-03-20 12:10:28,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:28,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:28,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:28,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:28,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:28,743 INFO L87 Difference]: Start difference. First operand 201 states and 271 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states 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 12:10:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:28,786 INFO L93 Difference]: Finished difference Result 445 states and 593 transitions. [2022-03-20 12:10:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:28,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 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 19 [2022-03-20 12:10:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:28,788 INFO L225 Difference]: With dead ends: 445 [2022-03-20 12:10:28,788 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 12:10:28,790 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 12:10:28,791 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 55 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 12:10:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2022-03-20 12:10:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.2806324110671936) internal successors, (324), 253 states have internal predecessors, (324), 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 12:10:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 327 transitions. [2022-03-20 12:10:28,801 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 327 transitions. Word has length 19 [2022-03-20 12:10:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,801 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 327 transitions. [2022-03-20 12:10:28,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states 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 12:10:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 327 transitions. [2022-03-20 12:10:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:10:28,808 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:28,808 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 12:10:28,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 12:10:28,808 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:28,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:28,808 INFO L85 PathProgramCache]: Analyzing trace with hash -678214798, now seen corresponding path program 1 times [2022-03-20 12:10:28,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:28,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037610798] [2022-03-20 12:10:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:28,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,838 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 12:10:28,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:28,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037610798] [2022-03-20 12:10:28,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037610798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:28,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:28,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927720405] [2022-03-20 12:10:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:28,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:28,839 INFO L87 Difference]: Start difference. First operand 257 states and 327 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 12:10:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:28,875 INFO L93 Difference]: Finished difference Result 385 states and 485 transitions. [2022-03-20 12:10:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:28,876 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 12:10:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:28,877 INFO L225 Difference]: With dead ends: 385 [2022-03-20 12:10:28,877 INFO L226 Difference]: Without dead ends: 267 [2022-03-20 12:10:28,877 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 12:10:28,878 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-20 12:10:28,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2022-03-20 12:10:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 261 states have (on average 1.2413793103448276) internal successors, (324), 261 states have internal predecessors, (324), 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 12:10:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 327 transitions. [2022-03-20 12:10:28,886 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 327 transitions. Word has length 20 [2022-03-20 12:10:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,886 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 327 transitions. [2022-03-20 12:10:28,886 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 12:10:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 327 transitions. [2022-03-20 12:10:28,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:10:28,887 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:28,887 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 12:10:28,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 12:10:28,887 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1809298035, now seen corresponding path program 1 times [2022-03-20 12:10:28,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:28,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920763562] [2022-03-20 12:10:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:28,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:28,907 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 12:10:28,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:28,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920763562] [2022-03-20 12:10:28,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920763562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:28,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:28,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:28,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122838431] [2022-03-20 12:10:28,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:28,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:28,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:28,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:28,909 INFO L87 Difference]: Start difference. First operand 265 states and 327 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 12:10:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:28,951 INFO L93 Difference]: Finished difference Result 427 states and 520 transitions. [2022-03-20 12:10:28,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:28,951 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 12:10:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:28,953 INFO L225 Difference]: With dead ends: 427 [2022-03-20 12:10:28,953 INFO L226 Difference]: Without dead ends: 425 [2022-03-20 12:10:28,953 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 12:10:28,954 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:28,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:28,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-20 12:10:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 393. [2022-03-20 12:10:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.2030848329048842) internal successors, (468), 389 states have internal predecessors, (468), 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 12:10:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 471 transitions. [2022-03-20 12:10:28,965 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 471 transitions. Word has length 20 [2022-03-20 12:10:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:28,966 INFO L478 AbstractCegarLoop]: Abstraction has 393 states and 471 transitions. [2022-03-20 12:10:28,966 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 12:10:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 471 transitions. [2022-03-20 12:10:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:10:28,970 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:10:28,970 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 12:10:28,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 12:10:28,975 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:10:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:10:28,975 INFO L85 PathProgramCache]: Analyzing trace with hash -742858926, now seen corresponding path program 1 times [2022-03-20 12:10:28,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:10:28,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791064027] [2022-03-20 12:10:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:10:28,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:10:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:29,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:10:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:10:29,008 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 12:10:29,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:10:29,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791064027] [2022-03-20 12:10:29,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791064027] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:10:29,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:10:29,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:10:29,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628375451] [2022-03-20 12:10:29,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:10:29,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:10:29,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:10:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:10:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:10:29,009 INFO L87 Difference]: Start difference. First operand 393 states and 471 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 12:10:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:10:29,047 INFO L93 Difference]: Finished difference Result 857 states and 999 transitions. [2022-03-20 12:10:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:10:29,048 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 12:10:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:10:29,049 INFO L225 Difference]: With dead ends: 857 [2022-03-20 12:10:29,049 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 12:10:29,050 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 12:10:29,050 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:10:29,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:10:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 12:10:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 12:10:29,051 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 12:10:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 12:10:29,052 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2022-03-20 12:10:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:10:29,052 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 12:10:29,052 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 12:10:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 12:10:29,052 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 12:10:29,054 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 12:10:29,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 12:10:29,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 12:10:29,405 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 12:10:29,406 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 12:10:29,406 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 12:10:29,406 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 12:10:29,406 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 12:10:29,406 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 12:10:29,406 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 12:10:29,406 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 6 95) the Hoare annotation is: true [2022-03-20 12:10:29,406 INFO L885 garLoopResultBuilder]: At program point L85-1(lines 26 90) the Hoare annotation is: true [2022-03-20 12:10:29,406 INFO L885 garLoopResultBuilder]: At program point L91(lines 7 95) the Hoare annotation is: true [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point L28(lines 28 30) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 6 95) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 45) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 6 95) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point L43-2(lines 26 90) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point L47-1(lines 26 90) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point L51-1(lines 26 90) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point L55-1(lines 26 90) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point L59-1(lines 26 90) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point L66(line 66) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point L65-1(lines 26 90) no Hoare annotation was computed. [2022-03-20 12:10:29,407 INFO L878 garLoopResultBuilder]: At program point L86-1(lines 7 95) the Hoare annotation is: false [2022-03-20 12:10:29,407 INFO L882 garLoopResultBuilder]: For program point L71(line 71) no Hoare annotation was computed. [2022-03-20 12:10:29,408 INFO L882 garLoopResultBuilder]: For program point L70-1(lines 26 90) no Hoare annotation was computed. [2022-03-20 12:10:29,408 INFO L882 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 93) no Hoare annotation was computed. [2022-03-20 12:10:29,408 INFO L882 garLoopResultBuilder]: For program point L76(line 76) no Hoare annotation was computed. [2022-03-20 12:10:29,408 INFO L882 garLoopResultBuilder]: For program point L75-1(lines 26 90) no Hoare annotation was computed. [2022-03-20 12:10:29,408 INFO L882 garLoopResultBuilder]: For program point L81(line 81) no Hoare annotation was computed. [2022-03-20 12:10:29,408 INFO L882 garLoopResultBuilder]: For program point L80-1(lines 26 90) no Hoare annotation was computed. [2022-03-20 12:10:29,408 INFO L882 garLoopResultBuilder]: For program point L86(line 86) no Hoare annotation was computed. [2022-03-20 12:10:29,410 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:10:29,411 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 12:10:29,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:10:29 BasicIcfg [2022-03-20 12:10:29,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 12:10:29,419 INFO L158 Benchmark]: Toolchain (without parser) took 2666.94ms. Allocated memory was 182.5MB in the beginning and 324.0MB in the end (delta: 141.6MB). Free memory was 158.2MB in the beginning and 179.7MB in the end (delta: -21.5MB). Peak memory consumption was 190.1MB. Max. memory is 8.0GB. [2022-03-20 12:10:29,419 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 182.5MB. Free memory is still 143.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 12:10:29,419 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.98ms. Allocated memory was 182.5MB in the beginning and 324.0MB in the end (delta: 141.6MB). Free memory was 158.0MB in the beginning and 296.6MB in the end (delta: -138.6MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. [2022-03-20 12:10:29,420 INFO L158 Benchmark]: Boogie Preprocessor took 56.96ms. Allocated memory is still 324.0MB. Free memory was 296.6MB in the beginning and 295.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 12:10:29,420 INFO L158 Benchmark]: RCFGBuilder took 221.05ms. Allocated memory is still 324.0MB. Free memory was 295.2MB in the beginning and 284.4MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 12:10:29,420 INFO L158 Benchmark]: IcfgTransformer took 29.65ms. Allocated memory is still 324.0MB. Free memory was 284.4MB in the beginning and 283.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 12:10:29,420 INFO L158 Benchmark]: TraceAbstraction took 2126.87ms. Allocated memory is still 324.0MB. Free memory was 282.6MB in the beginning and 179.7MB in the end (delta: 102.9MB). Peak memory consumption was 174.2MB. Max. memory is 8.0GB. [2022-03-20 12:10:29,422 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 182.5MB. Free memory is still 143.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.98ms. Allocated memory was 182.5MB in the beginning and 324.0MB in the end (delta: 141.6MB). Free memory was 158.0MB in the beginning and 296.6MB in the end (delta: -138.6MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 56.96ms. Allocated memory is still 324.0MB. Free memory was 296.6MB in the beginning and 295.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 221.05ms. Allocated memory is still 324.0MB. Free memory was 295.2MB in the beginning and 284.4MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 29.65ms. Allocated memory is still 324.0MB. Free memory was 284.4MB in the beginning and 283.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2126.87ms. Allocated memory is still 324.0MB. Free memory was 282.6MB in the beginning and 179.7MB in the end (delta: 102.9MB). Peak memory consumption was 174.2MB. 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: 93]: 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, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 14, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 910 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 910 mSDsluCounter, 768 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 100 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 462 IncrementalHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 668 mSDtfsCounter, 462 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=393occurred in iteration=13, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 13 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 254 NumberOfCodeBlocks, 254 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 240 ConstructedInterpolants, 0 QuantifiedInterpolants, 494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-03-20 12:10:29,466 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...