/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:08:28,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:08:28,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:08:28,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 12:08:28,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 12:08:28,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 12:08:28,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 12:08:28,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 12:08:28,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 12:08:28,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 12:08:28,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 12:08:28,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 12:08:28,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 12:08:28,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 12:08:28,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 12:08:28,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 12:08:28,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 12:08:28,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 12:08:28,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 12:08:28,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 12:08:28,149 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 12:08:28,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 12:08:28,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 12:08:28,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 12:08:28,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 12:08:28,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 12:08:28,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:08:28,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:08:28,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:08:28,165 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 12:08:28,188 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:08:28,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:08:28,190 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 12:08:28,190 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 12:08:28,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 12:08:28,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 12:08:28,191 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 12:08:28,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:08:28,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:08:28,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:08:28,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:08:28,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:08:28,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:08:28,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:08:28,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:08:28,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:08:28,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:08:28,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:08:28,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:08:28,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:08:28,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:08:28,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 12:08:28,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 12:08:28,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 12:08:28,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 12:08:28,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:08:28,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 12:08:28,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 12:08:28,194 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 12:08:28,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:08:28,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:08:28,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:08:28,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:08:28,398 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:08:28,398 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:08:28,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2022-03-20 12:08:28,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45378131/1a5e19f137764ab1a9942f97fc11729c/FLAGd198b4d12 [2022-03-20 12:08:28,800 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:08:28,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2022-03-20 12:08:28,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45378131/1a5e19f137764ab1a9942f97fc11729c/FLAGd198b4d12 [2022-03-20 12:08:28,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45378131/1a5e19f137764ab1a9942f97fc11729c [2022-03-20 12:08:28,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:08:28,819 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 12:08:28,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:08:28,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:08:28,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:08:28,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:08:28" (1/1) ... [2022-03-20 12:08:28,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ece271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:28, skipping insertion in model container [2022-03-20 12:08:28,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:08:28" (1/1) ... [2022-03-20 12:08:28,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:08:28,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:08:29,027 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c[3901,3914] [2022-03-20 12:08:29,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:08:29,035 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:08:29,049 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c[3901,3914] [2022-03-20 12:08:29,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:08:29,058 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:08:29,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:29 WrapperNode [2022-03-20 12:08:29,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:08:29,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:08:29,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:08:29,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:08:29,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:29" (1/1) ... [2022-03-20 12:08:29,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:29" (1/1) ... [2022-03-20 12:08:29,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:29" (1/1) ... [2022-03-20 12:08:29,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:29" (1/1) ... [2022-03-20 12:08:29,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:29" (1/1) ... [2022-03-20 12:08:29,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:29" (1/1) ... [2022-03-20 12:08:29,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:29" (1/1) ... [2022-03-20 12:08:29,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:08:29,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:08:29,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:08:29,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:08:29,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:29" (1/1) ... [2022-03-20 12:08:29,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:08:29,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:08:29,135 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 12:08:29,141 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 12:08:29,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:08:29,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:08:29,166 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:08:29,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:08:29,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:08:29,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:08:29,167 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:08:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:08:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:08:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:08:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:08:29,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:08:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:08:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:08:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:08:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:08:29,251 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:08:29,253 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:08:29,502 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:08:29,507 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:08:29,507 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 12:08:29,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:08:29 BoogieIcfgContainer [2022-03-20 12:08:29,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:08:29,509 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 12:08:29,509 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 12:08:29,510 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 12:08:29,512 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:08:29" (1/1) ... [2022-03-20 12:08:29,514 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 12:08:29,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 12:08:29 BasicIcfg [2022-03-20 12:08:29,528 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 12:08:29,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:08:29,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:08:29,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:08:29,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:08:28" (1/4) ... [2022-03-20 12:08:29,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34048f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:08:29, skipping insertion in model container [2022-03-20 12:08:29,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:08:29" (2/4) ... [2022-03-20 12:08:29,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34048f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:08:29, skipping insertion in model container [2022-03-20 12:08:29,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:08:29" (3/4) ... [2022-03-20 12:08:29,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34048f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:08:29, skipping insertion in model container [2022-03-20 12:08:29,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 12:08:29" (4/4) ... [2022-03-20 12:08:29,549 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.cqvasr [2022-03-20 12:08:29,553 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:08:29,553 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:08:29,597 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:08:29,602 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 12:08:29,602 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:08:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:08:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:08:29,637 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:29,637 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:29,638 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash -666508425, now seen corresponding path program 1 times [2022-03-20 12:08:29,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:29,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001334142] [2022-03-20 12:08:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:29,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:29,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:29,865 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 12:08:29,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:29,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001334142] [2022-03-20 12:08:29,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001334142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:29,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:29,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:29,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196971044] [2022-03-20 12:08:29,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:29,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:29,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:29,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:29,905 INFO L87 Difference]: Start difference. First operand has 45 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:30,066 INFO L93 Difference]: Finished difference Result 88 states and 151 transitions. [2022-03-20 12:08:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:30,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 12:08:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:30,074 INFO L225 Difference]: With dead ends: 88 [2022-03-20 12:08:30,074 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 12:08:30,076 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 12:08:30,079 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 174 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:30,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 89 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:08:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 12:08:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2022-03-20 12:08:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 90 transitions. [2022-03-20 12:08:30,133 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 90 transitions. Word has length 21 [2022-03-20 12:08:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:30,133 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 90 transitions. [2022-03-20 12:08:30,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 90 transitions. [2022-03-20 12:08:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:08:30,134 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:30,134 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:30,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:08:30,135 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash -959911432, now seen corresponding path program 1 times [2022-03-20 12:08:30,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:30,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990510973] [2022-03-20 12:08:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:30,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,220 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 12:08:30,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:30,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990510973] [2022-03-20 12:08:30,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990510973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:30,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:30,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:30,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238911203] [2022-03-20 12:08:30,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:30,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:30,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:30,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:30,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:30,223 INFO L87 Difference]: Start difference. First operand 51 states and 90 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:30,312 INFO L93 Difference]: Finished difference Result 118 states and 213 transitions. [2022-03-20 12:08:30,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:30,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 12:08:30,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:30,314 INFO L225 Difference]: With dead ends: 118 [2022-03-20 12:08:30,314 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 12:08:30,315 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 12:08:30,315 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:30,316 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 95 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:08:30,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 12:08:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-03-20 12:08:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.835820895522388) internal successors, (123), 67 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 126 transitions. [2022-03-20 12:08:30,324 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 126 transitions. Word has length 21 [2022-03-20 12:08:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:30,324 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 126 transitions. [2022-03-20 12:08:30,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2022-03-20 12:08:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:08:30,325 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:30,325 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:30,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:08:30,326 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:30,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:30,326 INFO L85 PathProgramCache]: Analyzing trace with hash 813107322, now seen corresponding path program 1 times [2022-03-20 12:08:30,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:30,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504542444] [2022-03-20 12:08:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:30,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,366 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 12:08:30,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:30,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504542444] [2022-03-20 12:08:30,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504542444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:30,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:30,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:30,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356204054] [2022-03-20 12:08:30,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:30,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:30,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:30,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:30,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:30,368 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:30,435 INFO L93 Difference]: Finished difference Result 109 states and 190 transitions. [2022-03-20 12:08:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 12:08:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:30,437 INFO L225 Difference]: With dead ends: 109 [2022-03-20 12:08:30,437 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 12:08:30,437 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 12:08:30,438 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 131 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:30,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 113 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:08:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 12:08:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-03-20 12:08:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 70 states have internal predecessors, (125), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 128 transitions. [2022-03-20 12:08:30,445 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 128 transitions. Word has length 22 [2022-03-20 12:08:30,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:30,445 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 128 transitions. [2022-03-20 12:08:30,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,446 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 128 transitions. [2022-03-20 12:08:30,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:08:30,446 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:30,446 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:30,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 12:08:30,447 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:30,447 INFO L85 PathProgramCache]: Analyzing trace with hash 307548697, now seen corresponding path program 1 times [2022-03-20 12:08:30,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:30,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881142770] [2022-03-20 12:08:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:30,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:08:30,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:30,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881142770] [2022-03-20 12:08:30,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881142770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:30,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:30,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:30,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690066727] [2022-03-20 12:08:30,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:30,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:30,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:30,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:30,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:30,484 INFO L87 Difference]: Start difference. First operand 74 states and 128 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:30,565 INFO L93 Difference]: Finished difference Result 137 states and 241 transitions. [2022-03-20 12:08:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 12:08:30,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:30,566 INFO L225 Difference]: With dead ends: 137 [2022-03-20 12:08:30,567 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 12:08:30,567 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 12:08:30,568 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:30,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:08:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 12:08:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 97. [2022-03-20 12:08:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.7849462365591398) internal successors, (166), 93 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 169 transitions. [2022-03-20 12:08:30,576 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 169 transitions. Word has length 22 [2022-03-20 12:08:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:30,576 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 169 transitions. [2022-03-20 12:08:30,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 169 transitions. [2022-03-20 12:08:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 12:08:30,577 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:30,577 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:30,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 12:08:30,577 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash 14145690, now seen corresponding path program 1 times [2022-03-20 12:08:30,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:30,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56769574] [2022-03-20 12:08:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:30,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,612 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 12:08:30,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:30,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56769574] [2022-03-20 12:08:30,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56769574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:30,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:30,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:30,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484214615] [2022-03-20 12:08:30,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:30,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:30,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:30,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:30,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:30,614 INFO L87 Difference]: Start difference. First operand 97 states and 169 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:30,672 INFO L93 Difference]: Finished difference Result 225 states and 399 transitions. [2022-03-20 12:08:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:30,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 12:08:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:30,674 INFO L225 Difference]: With dead ends: 225 [2022-03-20 12:08:30,674 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 12:08:30,674 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 12:08:30,675 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:30,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 97 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 12:08:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-03-20 12:08:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.7709923664122138) internal successors, (232), 131 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 235 transitions. [2022-03-20 12:08:30,682 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 235 transitions. Word has length 22 [2022-03-20 12:08:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:30,682 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 235 transitions. [2022-03-20 12:08:30,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 235 transitions. [2022-03-20 12:08:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:08:30,683 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:30,683 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:30,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 12:08:30,683 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash 944107156, now seen corresponding path program 1 times [2022-03-20 12:08:30,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:30,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330171774] [2022-03-20 12:08:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:30,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:08:30,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:30,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330171774] [2022-03-20 12:08:30,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330171774] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:30,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:30,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:30,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810412384] [2022-03-20 12:08:30,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:30,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:30,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:30,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:30,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:30,716 INFO L87 Difference]: Start difference. First operand 135 states and 235 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:30,774 INFO L93 Difference]: Finished difference Result 202 states and 350 transitions. [2022-03-20 12:08:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:30,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 12:08:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:30,775 INFO L225 Difference]: With dead ends: 202 [2022-03-20 12:08:30,776 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 12:08:30,776 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 12:08:30,777 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:30,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 110 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:30,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 12:08:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-03-20 12:08:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 133 states have (on average 1.744360902255639) internal successors, (232), 133 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 235 transitions. [2022-03-20 12:08:30,783 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 235 transitions. Word has length 23 [2022-03-20 12:08:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:30,784 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 235 transitions. [2022-03-20 12:08:30,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 235 transitions. [2022-03-20 12:08:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:08:30,784 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:30,785 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:30,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 12:08:30,785 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:30,785 INFO L85 PathProgramCache]: Analyzing trace with hash 438548531, now seen corresponding path program 1 times [2022-03-20 12:08:30,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:30,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713469761] [2022-03-20 12:08:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:30,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,815 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 12:08:30,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713469761] [2022-03-20 12:08:30,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713469761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:30,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:30,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:30,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219823322] [2022-03-20 12:08:30,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:30,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:30,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:30,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:30,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:30,816 INFO L87 Difference]: Start difference. First operand 137 states and 235 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:30,884 INFO L93 Difference]: Finished difference Result 253 states and 441 transitions. [2022-03-20 12:08:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:30,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 12:08:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:30,887 INFO L225 Difference]: With dead ends: 253 [2022-03-20 12:08:30,887 INFO L226 Difference]: Without dead ends: 251 [2022-03-20 12:08:30,887 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 12:08:30,890 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:30,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-20 12:08:30,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 185. [2022-03-20 12:08:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 1.723756906077348) internal successors, (312), 181 states have internal predecessors, (312), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 315 transitions. [2022-03-20 12:08:30,910 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 315 transitions. Word has length 23 [2022-03-20 12:08:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:30,911 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 315 transitions. [2022-03-20 12:08:30,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 315 transitions. [2022-03-20 12:08:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:08:30,912 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:30,912 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:30,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 12:08:30,912 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:30,912 INFO L85 PathProgramCache]: Analyzing trace with hash 145145524, now seen corresponding path program 1 times [2022-03-20 12:08:30,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:30,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526579680] [2022-03-20 12:08:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:30,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:30,971 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 12:08:30,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:30,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526579680] [2022-03-20 12:08:30,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526579680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:30,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:30,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:30,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660912785] [2022-03-20 12:08:30,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:30,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:30,976 INFO L87 Difference]: Start difference. First operand 185 states and 315 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:31,041 INFO L93 Difference]: Finished difference Result 433 states and 745 transitions. [2022-03-20 12:08:31,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:31,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 12:08:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:31,043 INFO L225 Difference]: With dead ends: 433 [2022-03-20 12:08:31,043 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 12:08:31,046 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 12:08:31,047 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:31,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 99 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:08:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 12:08:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2022-03-20 12:08:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.7075098814229248) internal successors, (432), 253 states have internal predecessors, (432), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 435 transitions. [2022-03-20 12:08:31,055 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 435 transitions. Word has length 23 [2022-03-20 12:08:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:31,056 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 435 transitions. [2022-03-20 12:08:31,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 435 transitions. [2022-03-20 12:08:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 12:08:31,061 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:31,062 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:31,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 12:08:31,062 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:31,062 INFO L85 PathProgramCache]: Analyzing trace with hash 710134838, now seen corresponding path program 1 times [2022-03-20 12:08:31,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:31,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244089772] [2022-03-20 12:08:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:31,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,090 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 12:08:31,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244089772] [2022-03-20 12:08:31,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244089772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:31,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:31,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:31,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586984315] [2022-03-20 12:08:31,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:31,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:31,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:31,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:31,092 INFO L87 Difference]: Start difference. First operand 257 states and 435 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:31,144 INFO L93 Difference]: Finished difference Result 385 states and 649 transitions. [2022-03-20 12:08:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:31,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-20 12:08:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:31,145 INFO L225 Difference]: With dead ends: 385 [2022-03-20 12:08:31,145 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 12:08:31,146 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 12:08:31,146 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:31,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 107 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:31,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 12:08:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2022-03-20 12:08:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 257 states have (on average 1.6809338521400778) internal successors, (432), 257 states have internal predecessors, (432), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 435 transitions. [2022-03-20 12:08:31,152 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 435 transitions. Word has length 24 [2022-03-20 12:08:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:31,152 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 435 transitions. [2022-03-20 12:08:31,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 435 transitions. [2022-03-20 12:08:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 12:08:31,153 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:31,153 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:31,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 12:08:31,154 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:31,154 INFO L85 PathProgramCache]: Analyzing trace with hash 204576213, now seen corresponding path program 1 times [2022-03-20 12:08:31,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:31,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803467018] [2022-03-20 12:08:31,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:31,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,177 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 12:08:31,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:31,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803467018] [2022-03-20 12:08:31,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803467018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:31,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:31,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:31,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962711374] [2022-03-20 12:08:31,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:31,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:31,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:31,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:31,179 INFO L87 Difference]: Start difference. First operand 261 states and 435 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:31,232 INFO L93 Difference]: Finished difference Result 477 states and 809 transitions. [2022-03-20 12:08:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:31,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-20 12:08:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:31,234 INFO L225 Difference]: With dead ends: 477 [2022-03-20 12:08:31,234 INFO L226 Difference]: Without dead ends: 475 [2022-03-20 12:08:31,234 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 12:08:31,235 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:31,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 75 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-03-20 12:08:31,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 361. [2022-03-20 12:08:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.6470588235294117) internal successors, (588), 357 states have internal predecessors, (588), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 591 transitions. [2022-03-20 12:08:31,242 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 591 transitions. Word has length 24 [2022-03-20 12:08:31,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:31,243 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 591 transitions. [2022-03-20 12:08:31,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,243 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 591 transitions. [2022-03-20 12:08:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 12:08:31,243 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:31,243 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:31,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 12:08:31,244 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash -88826794, now seen corresponding path program 1 times [2022-03-20 12:08:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:31,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673782333] [2022-03-20 12:08:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:31,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,266 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 12:08:31,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:31,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673782333] [2022-03-20 12:08:31,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673782333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:31,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:31,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:31,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371772963] [2022-03-20 12:08:31,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:31,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:31,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:31,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:31,268 INFO L87 Difference]: Start difference. First operand 361 states and 591 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:31,323 INFO L93 Difference]: Finished difference Result 845 states and 1393 transitions. [2022-03-20 12:08:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:31,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-20 12:08:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:31,325 INFO L225 Difference]: With dead ends: 845 [2022-03-20 12:08:31,325 INFO L226 Difference]: Without dead ends: 499 [2022-03-20 12:08:31,325 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 12:08:31,326 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:31,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 101 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-20 12:08:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2022-03-20 12:08:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 493 states have (on average 1.6308316430020284) internal successors, (804), 493 states have internal predecessors, (804), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 807 transitions. [2022-03-20 12:08:31,336 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 807 transitions. Word has length 24 [2022-03-20 12:08:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:31,336 INFO L478 AbstractCegarLoop]: Abstraction has 497 states and 807 transitions. [2022-03-20 12:08:31,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 807 transitions. [2022-03-20 12:08:31,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 12:08:31,336 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:31,337 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:31,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 12:08:31,337 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:31,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2046927696, now seen corresponding path program 1 times [2022-03-20 12:08:31,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:31,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140658380] [2022-03-20 12:08:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:31,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,358 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 12:08:31,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:31,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140658380] [2022-03-20 12:08:31,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140658380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:31,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:31,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:31,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188805657] [2022-03-20 12:08:31,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:31,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:31,360 INFO L87 Difference]: Start difference. First operand 497 states and 807 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:31,413 INFO L93 Difference]: Finished difference Result 745 states and 1205 transitions. [2022-03-20 12:08:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:31,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 12:08:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:31,415 INFO L225 Difference]: With dead ends: 745 [2022-03-20 12:08:31,415 INFO L226 Difference]: Without dead ends: 507 [2022-03-20 12:08:31,416 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 12:08:31,416 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 128 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:31,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 104 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-20 12:08:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2022-03-20 12:08:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.6047904191616766) internal successors, (804), 501 states have internal predecessors, (804), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 807 transitions. [2022-03-20 12:08:31,427 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 807 transitions. Word has length 25 [2022-03-20 12:08:31,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:31,427 INFO L478 AbstractCegarLoop]: Abstraction has 505 states and 807 transitions. [2022-03-20 12:08:31,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 807 transitions. [2022-03-20 12:08:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 12:08:31,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:31,428 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:31,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 12:08:31,428 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:31,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1541369071, now seen corresponding path program 1 times [2022-03-20 12:08:31,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:31,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145755943] [2022-03-20 12:08:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:31,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,450 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 12:08:31,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:31,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145755943] [2022-03-20 12:08:31,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145755943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:31,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:31,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:31,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083543687] [2022-03-20 12:08:31,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:31,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:31,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:31,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:31,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:31,451 INFO L87 Difference]: Start difference. First operand 505 states and 807 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:31,521 INFO L93 Difference]: Finished difference Result 909 states and 1481 transitions. [2022-03-20 12:08:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:31,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 12:08:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:31,524 INFO L225 Difference]: With dead ends: 909 [2022-03-20 12:08:31,524 INFO L226 Difference]: Without dead ends: 907 [2022-03-20 12:08:31,524 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 12:08:31,524 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:31,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 74 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:08:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-20 12:08:31,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 713. [2022-03-20 12:08:31,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 709 states have (on average 1.5627644569816643) internal successors, (1108), 709 states have internal predecessors, (1108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1111 transitions. [2022-03-20 12:08:31,538 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1111 transitions. Word has length 25 [2022-03-20 12:08:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:31,538 INFO L478 AbstractCegarLoop]: Abstraction has 713 states and 1111 transitions. [2022-03-20 12:08:31,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1111 transitions. [2022-03-20 12:08:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 12:08:31,539 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:31,540 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:31,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 12:08:31,540 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1247966064, now seen corresponding path program 1 times [2022-03-20 12:08:31,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:31,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903708857] [2022-03-20 12:08:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:31,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,560 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 12:08:31,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903708857] [2022-03-20 12:08:31,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903708857] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:31,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:31,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:31,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965337424] [2022-03-20 12:08:31,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:31,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:31,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:31,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:31,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:31,562 INFO L87 Difference]: Start difference. First operand 713 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:31,621 INFO L93 Difference]: Finished difference Result 1661 states and 2601 transitions. [2022-03-20 12:08:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:31,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 12:08:31,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:31,624 INFO L225 Difference]: With dead ends: 1661 [2022-03-20 12:08:31,624 INFO L226 Difference]: Without dead ends: 971 [2022-03-20 12:08:31,625 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 12:08:31,625 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:31,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 103 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:31,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-03-20 12:08:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 969. [2022-03-20 12:08:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.5461139896373057) internal successors, (1492), 965 states have internal predecessors, (1492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1495 transitions. [2022-03-20 12:08:31,661 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1495 transitions. Word has length 25 [2022-03-20 12:08:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:31,661 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1495 transitions. [2022-03-20 12:08:31,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1495 transitions. [2022-03-20 12:08:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:08:31,662 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:31,662 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:31,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 12:08:31,662 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:31,663 INFO L85 PathProgramCache]: Analyzing trace with hash 537833458, now seen corresponding path program 1 times [2022-03-20 12:08:31,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:31,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998174962] [2022-03-20 12:08:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:31,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,683 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 12:08:31,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:31,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998174962] [2022-03-20 12:08:31,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998174962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:31,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:31,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:31,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846810410] [2022-03-20 12:08:31,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:31,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:31,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:31,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:31,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:31,684 INFO L87 Difference]: Start difference. First operand 969 states and 1495 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:31,741 INFO L93 Difference]: Finished difference Result 1453 states and 2233 transitions. [2022-03-20 12:08:31,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:31,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 12:08:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:31,744 INFO L225 Difference]: With dead ends: 1453 [2022-03-20 12:08:31,744 INFO L226 Difference]: Without dead ends: 987 [2022-03-20 12:08:31,745 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 12:08:31,745 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:31,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 101 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-03-20 12:08:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 985. [2022-03-20 12:08:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 981 states have (on average 1.5208970438328238) internal successors, (1492), 981 states have internal predecessors, (1492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1495 transitions. [2022-03-20 12:08:31,762 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1495 transitions. Word has length 26 [2022-03-20 12:08:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:31,762 INFO L478 AbstractCegarLoop]: Abstraction has 985 states and 1495 transitions. [2022-03-20 12:08:31,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1495 transitions. [2022-03-20 12:08:31,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:08:31,763 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:31,763 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:31,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 12:08:31,763 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:31,763 INFO L85 PathProgramCache]: Analyzing trace with hash 32274833, now seen corresponding path program 1 times [2022-03-20 12:08:31,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:31,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528816491] [2022-03-20 12:08:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:31,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,782 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 12:08:31,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528816491] [2022-03-20 12:08:31,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528816491] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:31,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:31,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:31,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221018430] [2022-03-20 12:08:31,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:31,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:31,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:31,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:31,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:31,784 INFO L87 Difference]: Start difference. First operand 985 states and 1495 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:31,844 INFO L93 Difference]: Finished difference Result 1741 states and 2697 transitions. [2022-03-20 12:08:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:31,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 12:08:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:31,849 INFO L225 Difference]: With dead ends: 1741 [2022-03-20 12:08:31,850 INFO L226 Difference]: Without dead ends: 1739 [2022-03-20 12:08:31,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 12:08:31,851 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:31,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 73 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:31,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-03-20 12:08:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1417. [2022-03-20 12:08:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1413 states have (on average 1.4748761500353857) internal successors, (2084), 1413 states have internal predecessors, (2084), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2087 transitions. [2022-03-20 12:08:31,876 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2087 transitions. Word has length 26 [2022-03-20 12:08:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:31,876 INFO L478 AbstractCegarLoop]: Abstraction has 1417 states and 2087 transitions. [2022-03-20 12:08:31,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2087 transitions. [2022-03-20 12:08:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 12:08:31,878 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:31,878 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:31,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 12:08:31,878 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:31,878 INFO L85 PathProgramCache]: Analyzing trace with hash -261128174, now seen corresponding path program 1 times [2022-03-20 12:08:31,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:31,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904994667] [2022-03-20 12:08:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:31,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:31,897 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 12:08:31,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:31,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904994667] [2022-03-20 12:08:31,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904994667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:31,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:31,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:31,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406473883] [2022-03-20 12:08:31,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:31,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:31,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:31,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:31,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:31,898 INFO L87 Difference]: Start difference. First operand 1417 states and 2087 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:31,967 INFO L93 Difference]: Finished difference Result 3277 states and 4841 transitions. [2022-03-20 12:08:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:31,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 12:08:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:31,972 INFO L225 Difference]: With dead ends: 3277 [2022-03-20 12:08:31,972 INFO L226 Difference]: Without dead ends: 1899 [2022-03-20 12:08:31,976 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 12:08:31,977 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:31,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 105 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-03-20 12:08:32,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1897. [2022-03-20 12:08:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1893 states have (on average 1.4558901215002642) internal successors, (2756), 1893 states have internal predecessors, (2756), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2759 transitions. [2022-03-20 12:08:32,023 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2759 transitions. Word has length 26 [2022-03-20 12:08:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:32,023 INFO L478 AbstractCegarLoop]: Abstraction has 1897 states and 2759 transitions. [2022-03-20 12:08:32,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2759 transitions. [2022-03-20 12:08:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:08:32,024 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:32,024 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:32,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 12:08:32,025 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:32,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:32,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1000552460, now seen corresponding path program 1 times [2022-03-20 12:08:32,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:32,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228572692] [2022-03-20 12:08:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:32,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:32,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:32,055 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 12:08:32,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:32,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228572692] [2022-03-20 12:08:32,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228572692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:32,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:32,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:32,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281599398] [2022-03-20 12:08:32,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:32,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:32,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:32,056 INFO L87 Difference]: Start difference. First operand 1897 states and 2759 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:32,121 INFO L93 Difference]: Finished difference Result 2845 states and 4121 transitions. [2022-03-20 12:08:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:32,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 12:08:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:32,126 INFO L225 Difference]: With dead ends: 2845 [2022-03-20 12:08:32,126 INFO L226 Difference]: Without dead ends: 1931 [2022-03-20 12:08:32,128 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 12:08:32,128 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:32,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-03-20 12:08:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1929. [2022-03-20 12:08:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.4316883116883117) internal successors, (2756), 1925 states have internal predecessors, (2756), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2759 transitions. [2022-03-20 12:08:32,191 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2759 transitions. Word has length 27 [2022-03-20 12:08:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:32,192 INFO L478 AbstractCegarLoop]: Abstraction has 1929 states and 2759 transitions. [2022-03-20 12:08:32,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2759 transitions. [2022-03-20 12:08:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:08:32,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:32,193 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:32,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 12:08:32,194 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:32,194 INFO L85 PathProgramCache]: Analyzing trace with hash 494993835, now seen corresponding path program 1 times [2022-03-20 12:08:32,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:32,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091321998] [2022-03-20 12:08:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:32,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:32,213 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 12:08:32,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:32,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091321998] [2022-03-20 12:08:32,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091321998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:32,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:32,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:32,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751169591] [2022-03-20 12:08:32,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:32,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:32,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:32,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:32,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:32,215 INFO L87 Difference]: Start difference. First operand 1929 states and 2759 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:32,297 INFO L93 Difference]: Finished difference Result 3341 states and 4873 transitions. [2022-03-20 12:08:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 12:08:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:32,305 INFO L225 Difference]: With dead ends: 3341 [2022-03-20 12:08:32,305 INFO L226 Difference]: Without dead ends: 3339 [2022-03-20 12:08:32,306 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 12:08:32,307 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:32,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 72 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-03-20 12:08:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2825. [2022-03-20 12:08:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2821 states have (on average 1.3853243530662886) internal successors, (3908), 2821 states have internal predecessors, (3908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3911 transitions. [2022-03-20 12:08:32,357 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3911 transitions. Word has length 27 [2022-03-20 12:08:32,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:32,358 INFO L478 AbstractCegarLoop]: Abstraction has 2825 states and 3911 transitions. [2022-03-20 12:08:32,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3911 transitions. [2022-03-20 12:08:32,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:08:32,360 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:32,360 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:32,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 12:08:32,360 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:32,361 INFO L85 PathProgramCache]: Analyzing trace with hash 201590828, now seen corresponding path program 1 times [2022-03-20 12:08:32,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:32,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781162784] [2022-03-20 12:08:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:32,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:32,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:08:32,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:32,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781162784] [2022-03-20 12:08:32,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781162784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:32,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:32,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:32,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145095918] [2022-03-20 12:08:32,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:32,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:32,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:32,380 INFO L87 Difference]: Start difference. First operand 2825 states and 3911 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:32,462 INFO L93 Difference]: Finished difference Result 6477 states and 8969 transitions. [2022-03-20 12:08:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 12:08:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:32,471 INFO L225 Difference]: With dead ends: 6477 [2022-03-20 12:08:32,471 INFO L226 Difference]: Without dead ends: 3723 [2022-03-20 12:08:32,475 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 12:08:32,475 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:32,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 107 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-03-20 12:08:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3721. [2022-03-20 12:08:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3717 states have (on average 1.3613128867366155) internal successors, (5060), 3717 states have internal predecessors, (5060), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5063 transitions. [2022-03-20 12:08:32,584 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5063 transitions. Word has length 27 [2022-03-20 12:08:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:32,584 INFO L478 AbstractCegarLoop]: Abstraction has 3721 states and 5063 transitions. [2022-03-20 12:08:32,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5063 transitions. [2022-03-20 12:08:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:08:32,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:32,587 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:32,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 12:08:32,587 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:32,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1835027538, now seen corresponding path program 1 times [2022-03-20 12:08:32,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:32,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878525068] [2022-03-20 12:08:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:32,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:32,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:32,630 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 12:08:32,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878525068] [2022-03-20 12:08:32,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878525068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:32,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:32,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:32,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691132856] [2022-03-20 12:08:32,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:32,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:32,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:32,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:32,633 INFO L87 Difference]: Start difference. First operand 3721 states and 5063 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:32,740 INFO L93 Difference]: Finished difference Result 5581 states and 7561 transitions. [2022-03-20 12:08:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:32,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 12:08:32,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:32,749 INFO L225 Difference]: With dead ends: 5581 [2022-03-20 12:08:32,749 INFO L226 Difference]: Without dead ends: 3787 [2022-03-20 12:08:32,753 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 12:08:32,766 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 125 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:32,766 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 95 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:08:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2022-03-20 12:08:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3785. [2022-03-20 12:08:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3781 states have (on average 1.3382702988627346) internal successors, (5060), 3781 states have internal predecessors, (5060), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5063 transitions. [2022-03-20 12:08:32,903 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5063 transitions. Word has length 28 [2022-03-20 12:08:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:32,903 INFO L478 AbstractCegarLoop]: Abstraction has 3785 states and 5063 transitions. [2022-03-20 12:08:32,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5063 transitions. [2022-03-20 12:08:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:08:32,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:32,917 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:32,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 12:08:32,917 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:32,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1954381133, now seen corresponding path program 1 times [2022-03-20 12:08:32,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:32,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115715645] [2022-03-20 12:08:32,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:32,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:32,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:32,970 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 12:08:32,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:32,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115715645] [2022-03-20 12:08:32,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115715645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:32,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:32,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:32,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845483350] [2022-03-20 12:08:32,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:32,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:32,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:32,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:32,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:32,971 INFO L87 Difference]: Start difference. First operand 3785 states and 5063 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:33,070 INFO L93 Difference]: Finished difference Result 6413 states and 8713 transitions. [2022-03-20 12:08:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:33,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 12:08:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:33,096 INFO L225 Difference]: With dead ends: 6413 [2022-03-20 12:08:33,096 INFO L226 Difference]: Without dead ends: 6411 [2022-03-20 12:08:33,099 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 12:08:33,100 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:33,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 71 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2022-03-20 12:08:33,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5641. [2022-03-20 12:08:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.2950150789427) internal successors, (7300), 5637 states have internal predecessors, (7300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 7303 transitions. [2022-03-20 12:08:33,233 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 7303 transitions. Word has length 28 [2022-03-20 12:08:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:33,233 INFO L478 AbstractCegarLoop]: Abstraction has 5641 states and 7303 transitions. [2022-03-20 12:08:33,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 7303 transitions. [2022-03-20 12:08:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:08:33,239 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:33,240 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:33,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 12:08:33,240 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1660978126, now seen corresponding path program 1 times [2022-03-20 12:08:33,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:33,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837543611] [2022-03-20 12:08:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:33,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:33,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:33,268 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 12:08:33,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837543611] [2022-03-20 12:08:33,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837543611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:33,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:33,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712274729] [2022-03-20 12:08:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:33,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:33,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:33,271 INFO L87 Difference]: Start difference. First operand 5641 states and 7303 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:33,388 INFO L93 Difference]: Finished difference Result 12813 states and 16521 transitions. [2022-03-20 12:08:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 12:08:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:33,399 INFO L225 Difference]: With dead ends: 12813 [2022-03-20 12:08:33,399 INFO L226 Difference]: Without dead ends: 7307 [2022-03-20 12:08:33,408 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 12:08:33,408 INFO L913 BasicCegarLoop]: 102 mSDtfsCounter, 106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:33,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 109 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2022-03-20 12:08:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 7305. [2022-03-20 12:08:33,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7301 states have (on average 1.2628407067524996) internal successors, (9220), 7301 states have internal predecessors, (9220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 9223 transitions. [2022-03-20 12:08:33,573 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 9223 transitions. Word has length 28 [2022-03-20 12:08:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:33,573 INFO L478 AbstractCegarLoop]: Abstraction has 7305 states and 9223 transitions. [2022-03-20 12:08:33,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 9223 transitions. [2022-03-20 12:08:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 12:08:33,579 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:33,579 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:33,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 12:08:33,579 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:33,580 INFO L85 PathProgramCache]: Analyzing trace with hash 456305864, now seen corresponding path program 1 times [2022-03-20 12:08:33,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:33,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498417100] [2022-03-20 12:08:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:33,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:33,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:33,601 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 12:08:33,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:33,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498417100] [2022-03-20 12:08:33,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498417100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:33,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:33,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:33,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029282740] [2022-03-20 12:08:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:33,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:33,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:33,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:33,602 INFO L87 Difference]: Start difference. First operand 7305 states and 9223 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:33,703 INFO L93 Difference]: Finished difference Result 10957 states and 13769 transitions. [2022-03-20 12:08:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:33,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 12:08:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:33,714 INFO L225 Difference]: With dead ends: 10957 [2022-03-20 12:08:33,715 INFO L226 Difference]: Without dead ends: 7435 [2022-03-20 12:08:33,722 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 12:08:33,722 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:33,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 92 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2022-03-20 12:08:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 7433. [2022-03-20 12:08:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7429 states have (on average 1.2410822452550814) internal successors, (9220), 7429 states have internal predecessors, (9220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 9223 transitions. [2022-03-20 12:08:33,892 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 9223 transitions. Word has length 29 [2022-03-20 12:08:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:33,892 INFO L478 AbstractCegarLoop]: Abstraction has 7433 states and 9223 transitions. [2022-03-20 12:08:33,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 9223 transitions. [2022-03-20 12:08:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 12:08:33,898 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:33,898 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:33,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 12:08:33,899 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:33,899 INFO L85 PathProgramCache]: Analyzing trace with hash -49252761, now seen corresponding path program 1 times [2022-03-20 12:08:33,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:33,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510860240] [2022-03-20 12:08:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:33,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:33,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:33,928 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 12:08:33,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:33,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510860240] [2022-03-20 12:08:33,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510860240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:33,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:33,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:33,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565838229] [2022-03-20 12:08:33,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:33,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:33,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:33,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:33,930 INFO L87 Difference]: Start difference. First operand 7433 states and 9223 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:34,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:34,099 INFO L93 Difference]: Finished difference Result 12301 states and 15369 transitions. [2022-03-20 12:08:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:34,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 12:08:34,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:34,118 INFO L225 Difference]: With dead ends: 12301 [2022-03-20 12:08:34,118 INFO L226 Difference]: Without dead ends: 12299 [2022-03-20 12:08:34,125 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 12:08:34,126 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:34,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2022-03-20 12:08:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11273. [2022-03-20 12:08:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.2043659597124856) internal successors, (13572), 11269 states have internal predecessors, (13572), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 13575 transitions. [2022-03-20 12:08:34,388 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 13575 transitions. Word has length 29 [2022-03-20 12:08:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:34,388 INFO L478 AbstractCegarLoop]: Abstraction has 11273 states and 13575 transitions. [2022-03-20 12:08:34,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 13575 transitions. [2022-03-20 12:08:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 12:08:34,399 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:34,399 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:34,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 12:08:34,399 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:34,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:34,399 INFO L85 PathProgramCache]: Analyzing trace with hash -342655768, now seen corresponding path program 1 times [2022-03-20 12:08:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:34,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122123521] [2022-03-20 12:08:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:34,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:34,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:34,425 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 12:08:34,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:34,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122123521] [2022-03-20 12:08:34,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122123521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:34,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:34,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:34,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507077683] [2022-03-20 12:08:34,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:34,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:34,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:34,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:34,427 INFO L87 Difference]: Start difference. First operand 11273 states and 13575 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:34,600 INFO L93 Difference]: Finished difference Result 25357 states and 30217 transitions. [2022-03-20 12:08:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:34,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 12:08:34,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:34,622 INFO L225 Difference]: With dead ends: 25357 [2022-03-20 12:08:34,622 INFO L226 Difference]: Without dead ends: 14347 [2022-03-20 12:08:34,641 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 12:08:34,642 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:34,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2022-03-20 12:08:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 14345. [2022-03-20 12:08:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.1605885224182415) internal successors, (16644), 14341 states have internal predecessors, (16644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:34,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 16647 transitions. [2022-03-20 12:08:34,924 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 16647 transitions. Word has length 29 [2022-03-20 12:08:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:34,925 INFO L478 AbstractCegarLoop]: Abstraction has 14345 states and 16647 transitions. [2022-03-20 12:08:34,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:34,925 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 16647 transitions. [2022-03-20 12:08:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 12:08:34,936 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:34,936 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:34,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 12:08:34,936 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1526802582, now seen corresponding path program 1 times [2022-03-20 12:08:34,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:34,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399087701] [2022-03-20 12:08:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:34,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:34,957 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 12:08:34,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:34,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399087701] [2022-03-20 12:08:34,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399087701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:34,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:34,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:34,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181912433] [2022-03-20 12:08:34,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:34,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:34,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:34,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:34,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:34,959 INFO L87 Difference]: Start difference. First operand 14345 states and 16647 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:35,120 INFO L93 Difference]: Finished difference Result 21517 states and 24841 transitions. [2022-03-20 12:08:35,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 12:08:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:35,143 INFO L225 Difference]: With dead ends: 21517 [2022-03-20 12:08:35,143 INFO L226 Difference]: Without dead ends: 14603 [2022-03-20 12:08:35,158 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 12:08:35,158 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 123 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:35,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 89 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2022-03-20 12:08:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14601. [2022-03-20 12:08:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14601 states, 14597 states have (on average 1.1402342947180928) internal successors, (16644), 14597 states have internal predecessors, (16644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 16647 transitions. [2022-03-20 12:08:35,491 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 16647 transitions. Word has length 30 [2022-03-20 12:08:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:35,491 INFO L478 AbstractCegarLoop]: Abstraction has 14601 states and 16647 transitions. [2022-03-20 12:08:35,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 16647 transitions. [2022-03-20 12:08:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 12:08:35,502 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:35,502 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:35,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 12:08:35,503 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2032361207, now seen corresponding path program 1 times [2022-03-20 12:08:35,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:35,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920851146] [2022-03-20 12:08:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:35,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:35,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:35,523 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 12:08:35,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:35,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920851146] [2022-03-20 12:08:35,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920851146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:35,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:35,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:35,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395828226] [2022-03-20 12:08:35,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:35,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:35,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:35,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:35,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:35,525 INFO L87 Difference]: Start difference. First operand 14601 states and 16647 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:35,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:35,876 INFO L93 Difference]: Finished difference Result 23563 states and 26632 transitions. [2022-03-20 12:08:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:35,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 12:08:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:35,911 INFO L225 Difference]: With dead ends: 23563 [2022-03-20 12:08:35,911 INFO L226 Difference]: Without dead ends: 23561 [2022-03-20 12:08:35,916 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 12:08:35,917 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 104 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:35,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 68 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23561 states. [2022-03-20 12:08:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23561 to 22537. [2022-03-20 12:08:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22537 states, 22533 states have (on average 1.1135667687391826) internal successors, (25092), 22533 states have internal predecessors, (25092), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22537 states to 22537 states and 25095 transitions. [2022-03-20 12:08:36,690 INFO L78 Accepts]: Start accepts. Automaton has 22537 states and 25095 transitions. Word has length 30 [2022-03-20 12:08:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:36,690 INFO L478 AbstractCegarLoop]: Abstraction has 22537 states and 25095 transitions. [2022-03-20 12:08:36,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 22537 states and 25095 transitions. [2022-03-20 12:08:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 12:08:36,751 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:08:36,751 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:08:36,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 12:08:36,751 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:08:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:08:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1969203082, now seen corresponding path program 1 times [2022-03-20 12:08:36,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:08:36,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944437644] [2022-03-20 12:08:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:08:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:08:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:36,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:08:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:08:36,772 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 12:08:36,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:08:36,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944437644] [2022-03-20 12:08:36,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944437644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:08:36,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:08:36,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:08:36,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521739585] [2022-03-20 12:08:36,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:08:36,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:08:36,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 12:08:36,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:08:36,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:08:36,773 INFO L87 Difference]: Start difference. First operand 22537 states and 25095 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:08:37,168 INFO L93 Difference]: Finished difference Result 50185 states and 54791 transitions. [2022-03-20 12:08:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:08:37,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 12:08:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:08:37,169 INFO L225 Difference]: With dead ends: 50185 [2022-03-20 12:08:37,169 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 12:08:37,209 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 12:08:37,212 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 91 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:08:37,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 112 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:08:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 12:08:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 12:08:37,213 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 12:08:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 12:08:37,213 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-03-20 12:08:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:08:37,214 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 12:08:37,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 12:08:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 12:08:37,214 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 12:08:37,216 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 12:08:37,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 12:08:37,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 12:11:23,695 WARN L232 SmtUtils]: Spent 2.77m on a formula simplification that was a NOOP. DAG size: 4152 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-20 12:11:23,767 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 12:11:23,767 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 12:11:23,767 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 12:11:23,767 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 12:11:23,767 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 12:11:23,767 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 12:11:23,767 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 12:11:23,767 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 6 165) the Hoare annotation is: true [2022-03-20 12:11:23,767 INFO L885 garLoopResultBuilder]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2022-03-20 12:11:23,767 INFO L885 garLoopResultBuilder]: At program point L161(lines 7 165) the Hoare annotation is: true [2022-03-20 12:11:23,767 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 45) no Hoare annotation was computed. [2022-03-20 12:11:23,767 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 6 165) no Hoare annotation was computed. [2022-03-20 12:11:23,767 INFO L882 garLoopResultBuilder]: For program point L68(lines 68 70) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 6 165) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L68-2(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L72-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L76-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L80-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L84-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L88-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L92-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L96-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L100-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L111(line 111) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L878 garLoopResultBuilder]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L116(line 116) no Hoare annotation was computed. [2022-03-20 12:11:23,768 INFO L882 garLoopResultBuilder]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 163) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L121(line 121) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L126(line 126) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L131(line 131) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L136(line 136) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L141(line 141) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L146(line 146) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L151(line 151) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2022-03-20 12:11:23,769 INFO L882 garLoopResultBuilder]: For program point L156(line 156) no Hoare annotation was computed. [2022-03-20 12:11:23,772 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:11:23,773 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 12:11:23,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 12:11:23 BasicIcfg [2022-03-20 12:11:23,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 12:11:23,780 INFO L158 Benchmark]: Toolchain (without parser) took 174961.05ms. Allocated memory was 164.6MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 106.4MB in the beginning and 855.3MB in the end (delta: -748.9MB). Peak memory consumption was 1.3GB. Max. memory is 8.0GB. [2022-03-20 12:11:23,780 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 164.6MB. Free memory is still 122.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 12:11:23,780 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.32ms. Allocated memory was 164.6MB in the beginning and 238.0MB in the end (delta: 73.4MB). Free memory was 106.1MB in the beginning and 211.0MB in the end (delta: -104.9MB). Peak memory consumption was 16.1MB. Max. memory is 8.0GB. [2022-03-20 12:11:23,780 INFO L158 Benchmark]: Boogie Preprocessor took 34.63ms. Allocated memory is still 238.0MB. Free memory was 211.0MB in the beginning and 209.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 12:11:23,783 INFO L158 Benchmark]: RCFGBuilder took 413.11ms. Allocated memory is still 238.0MB. Free memory was 209.4MB in the beginning and 196.3MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-03-20 12:11:23,783 INFO L158 Benchmark]: IcfgTransformer took 19.25ms. Allocated memory is still 238.0MB. Free memory was 196.3MB in the beginning and 194.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 12:11:23,783 INFO L158 Benchmark]: TraceAbstraction took 174250.56ms. Allocated memory was 238.0MB in the beginning and 1.9GB in the end (delta: 1.6GB). Free memory was 194.2MB in the beginning and 855.3MB in the end (delta: -661.0MB). Peak memory consumption was 1.3GB. Max. memory is 8.0GB. [2022-03-20 12:11:23,789 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 164.6MB. Free memory is still 122.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 238.32ms. Allocated memory was 164.6MB in the beginning and 238.0MB in the end (delta: 73.4MB). Free memory was 106.1MB in the beginning and 211.0MB in the end (delta: -104.9MB). Peak memory consumption was 16.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.63ms. Allocated memory is still 238.0MB. Free memory was 211.0MB in the beginning and 209.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 413.11ms. Allocated memory is still 238.0MB. Free memory was 209.4MB in the beginning and 196.3MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 19.25ms. Allocated memory is still 238.0MB. Free memory was 196.3MB in the beginning and 194.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 174250.56ms. Allocated memory was 238.0MB in the beginning and 1.9GB in the end (delta: 1.6GB). Free memory was 194.2MB in the beginning and 855.3MB in the end (delta: -661.0MB). Peak memory consumption was 1.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 163]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 174.2s, OverallIterations: 29, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.2s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 166.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3720 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3720 mSDsluCounter, 2693 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 205 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1747 IncrementalHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 2488 mSDtfsCounter, 1747 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 203 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22537occurred in iteration=28, InterpolantAutomatonStates: 116, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 29 MinimizatonAttempts, 4126 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 13 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 166.5s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 744 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 715 ConstructedInterpolants, 0 QuantifiedInterpolants, 1579 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 29 InterpolantComputations, 29 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-03-20 12:11:23,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...