/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/loop-invgen/heapsort.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:22:44,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:22:44,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:22:44,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:22:44,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:22:44,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:22:44,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:22:44,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:22:44,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:22:44,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:22:44,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:22:44,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:22:44,518 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:22:44,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:22:44,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:22:44,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:22:44,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:22:44,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:22:44,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:22:44,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:22:44,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:22:44,530 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 08:22:44,553 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:22:44,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:22:44,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:22:44,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:22:44,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:22:44,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:22:44,555 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:22:44,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:22:44,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:22:44,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:22:44,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:22:44,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:22:44,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:22:44,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:22:44,556 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:22:44,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:22:44,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:22:44,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:22:44,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:22:44,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:22:44,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:22:44,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:22:44,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:22:44,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:22:44,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:22:44,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:22:44,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:22:44,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:22:44,558 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:22:44,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:22:44,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:22:44,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:22:44,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:22:44,782 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:22:44,783 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:22:44,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/heapsort.i [2022-03-20 08:22:44,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a794b5c4/bf0b0794d1dd4cf28994563fc0adfaf3/FLAGc875a5031 [2022-03-20 08:22:45,148 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:22:45,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i [2022-03-20 08:22:45,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a794b5c4/bf0b0794d1dd4cf28994563fc0adfaf3/FLAGc875a5031 [2022-03-20 08:22:45,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a794b5c4/bf0b0794d1dd4cf28994563fc0adfaf3 [2022-03-20 08:22:45,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:22:45,592 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:22:45,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:22:45,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:22:45,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:22:45,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:22:45" (1/1) ... [2022-03-20 08:22:45,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117a6125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45, skipping insertion in model container [2022-03-20 08:22:45,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:22:45" (1/1) ... [2022-03-20 08:22:45,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:22:45,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:22:45,755 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-03-20 08:22:45,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:22:45,809 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:22:45,819 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-03-20 08:22:45,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:22:45,844 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:22:45,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45 WrapperNode [2022-03-20 08:22:45,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:22:45,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:22:45,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:22:45,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:22:45,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45" (1/1) ... [2022-03-20 08:22:45,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45" (1/1) ... [2022-03-20 08:22:45,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45" (1/1) ... [2022-03-20 08:22:45,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45" (1/1) ... [2022-03-20 08:22:45,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45" (1/1) ... [2022-03-20 08:22:45,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45" (1/1) ... [2022-03-20 08:22:45,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45" (1/1) ... [2022-03-20 08:22:45,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:22:45,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:22:45,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:22:45,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:22:45,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45" (1/1) ... [2022-03-20 08:22:45,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:22:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:22:45,908 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 08:22:45,912 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 08:22:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:22:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:22:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:22:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 08:22:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:22:45,934 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:22:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:22:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:22:45,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:22:46,021 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:22:46,022 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:22:46,149 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:22:46,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:22:46,154 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 08:22:46,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:22:46 BoogieIcfgContainer [2022-03-20 08:22:46,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:22:46,156 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:22:46,156 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:22:46,157 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:22:46,159 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:22:46" (1/1) ... [2022-03-20 08:22:46,161 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:22:46,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:22:46 BasicIcfg [2022-03-20 08:22:46,174 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:22:46,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:22:46,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:22:46,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:22:46,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:22:45" (1/4) ... [2022-03-20 08:22:46,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a40bdf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:22:46, skipping insertion in model container [2022-03-20 08:22:46,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:22:45" (2/4) ... [2022-03-20 08:22:46,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a40bdf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:22:46, skipping insertion in model container [2022-03-20 08:22:46,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:22:46" (3/4) ... [2022-03-20 08:22:46,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a40bdf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:22:46, skipping insertion in model container [2022-03-20 08:22:46,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:22:46" (4/4) ... [2022-03-20 08:22:46,180 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.iqvasr [2022-03-20 08:22:46,183 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:22:46,183 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:22:46,214 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:22:46,218 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 08:22:46,219 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:22:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 08:22:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:22:46,236 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:46,236 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:46,237 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash -972496655, now seen corresponding path program 1 times [2022-03-20 08:22:46,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:46,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707856018] [2022-03-20 08:22:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:46,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:46,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:46,435 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 08:22:46,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:46,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707856018] [2022-03-20 08:22:46,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707856018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:46,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:46,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:22:46,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486362544] [2022-03-20 08:22:46,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:46,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:22:46,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:46,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:22:46,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:22:46,468 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:46,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:46,584 INFO L93 Difference]: Finished difference Result 80 states and 138 transitions. [2022-03-20 08:22:46,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:22:46,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 08:22:46,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:46,594 INFO L225 Difference]: With dead ends: 80 [2022-03-20 08:22:46,594 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 08:22:46,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:22:46,601 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:46,603 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:22:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 08:22:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 08:22:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 08:22:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 58 transitions. [2022-03-20 08:22:46,654 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 58 transitions. Word has length 15 [2022-03-20 08:22:46,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:46,655 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 58 transitions. [2022-03-20 08:22:46,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:46,656 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 58 transitions. [2022-03-20 08:22:46,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:22:46,656 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:46,657 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:46,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:22:46,658 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:46,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:46,660 INFO L85 PathProgramCache]: Analyzing trace with hash -943867504, now seen corresponding path program 1 times [2022-03-20 08:22:46,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:46,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460913133] [2022-03-20 08:22:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:46,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:46,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:46,803 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 08:22:46,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:46,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460913133] [2022-03-20 08:22:46,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460913133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:46,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:46,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:22:46,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585049059] [2022-03-20 08:22:46,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:46,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:22:46,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:46,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:22:46,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:22:46,808 INFO L87 Difference]: Start difference. First operand 39 states and 58 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:46,985 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2022-03-20 08:22:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:22:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 08:22:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:46,987 INFO L225 Difference]: With dead ends: 46 [2022-03-20 08:22:46,987 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 08:22:46,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:22:46,988 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:46,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 52 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:22:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 08:22:46,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-20 08:22:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 08:22:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-03-20 08:22:46,997 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 15 [2022-03-20 08:22:46,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:46,997 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-03-20 08:22:46,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-03-20 08:22:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:22:46,998 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:46,998 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:46,998 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:22:46,998 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:46,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:46,999 INFO L85 PathProgramCache]: Analyzing trace with hash -944820816, now seen corresponding path program 1 times [2022-03-20 08:22:46,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:46,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550772363] [2022-03-20 08:22:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:47,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:47,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:47,043 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 08:22:47,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:47,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550772363] [2022-03-20 08:22:47,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550772363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:47,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:47,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:22:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431014138] [2022-03-20 08:22:47,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:47,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:22:47,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:22:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:22:47,045 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:47,235 INFO L93 Difference]: Finished difference Result 71 states and 105 transitions. [2022-03-20 08:22:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:22:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 08:22:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:47,236 INFO L225 Difference]: With dead ends: 71 [2022-03-20 08:22:47,236 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 08:22:47,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:22:47,237 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:47,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:22:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 08:22:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2022-03-20 08:22:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 08:22:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-03-20 08:22:47,245 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 15 [2022-03-20 08:22:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:47,245 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-03-20 08:22:47,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:47,246 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-03-20 08:22:47,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:22:47,246 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:47,246 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:47,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 08:22:47,246 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:47,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:47,247 INFO L85 PathProgramCache]: Analyzing trace with hash -914285041, now seen corresponding path program 1 times [2022-03-20 08:22:47,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:47,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196393645] [2022-03-20 08:22:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:47,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:47,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:22:47,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:47,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196393645] [2022-03-20 08:22:47,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196393645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:47,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:47,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 08:22:47,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603763399] [2022-03-20 08:22:47,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:47,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 08:22:47,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 08:22:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 08:22:47,291 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:47,513 INFO L93 Difference]: Finished difference Result 80 states and 115 transitions. [2022-03-20 08:22:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:22:47,513 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 08:22:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:47,514 INFO L225 Difference]: With dead ends: 80 [2022-03-20 08:22:47,514 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 08:22:47,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 08:22:47,515 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:47,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 55 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:22:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 08:22:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-03-20 08:22:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 28 states have call successors, (28), 6 states have call predecessors, (28), 5 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 08:22:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 106 transitions. [2022-03-20 08:22:47,524 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 106 transitions. Word has length 15 [2022-03-20 08:22:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:47,525 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 106 transitions. [2022-03-20 08:22:47,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:22:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 106 transitions. [2022-03-20 08:22:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 08:22:47,525 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:47,526 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:47,526 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 08:22:47,526 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:47,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:47,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1889400257, now seen corresponding path program 1 times [2022-03-20 08:22:47,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:47,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153798700] [2022-03-20 08:22:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:47,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:47,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:47,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:22:47,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:47,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153798700] [2022-03-20 08:22:47,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153798700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:47,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:47,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:22:47,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664902102] [2022-03-20 08:22:47,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:47,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:22:47,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:22:47,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:22:47,590 INFO L87 Difference]: Start difference. First operand 73 states and 106 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:22:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:47,744 INFO L93 Difference]: Finished difference Result 79 states and 111 transitions. [2022-03-20 08:22:47,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:22:47,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 08:22:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:47,746 INFO L225 Difference]: With dead ends: 79 [2022-03-20 08:22:47,746 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 08:22:47,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:22:47,748 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:47,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:22:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 08:22:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-20 08:22:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 08:22:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-03-20 08:22:47,759 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 20 [2022-03-20 08:22:47,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:47,759 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-03-20 08:22:47,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:22:47,760 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-03-20 08:22:47,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 08:22:47,760 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:47,760 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:47,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 08:22:47,761 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:47,761 INFO L85 PathProgramCache]: Analyzing trace with hash -403505695, now seen corresponding path program 1 times [2022-03-20 08:22:47,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:47,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879217708] [2022-03-20 08:22:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:47,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:47,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:47,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:22:47,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:47,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879217708] [2022-03-20 08:22:47,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879217708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:47,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:47,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 08:22:47,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758443528] [2022-03-20 08:22:47,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:47,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:22:47,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:22:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:22:47,816 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:22:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:48,077 INFO L93 Difference]: Finished difference Result 110 states and 160 transitions. [2022-03-20 08:22:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:22:48,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 08:22:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:48,078 INFO L225 Difference]: With dead ends: 110 [2022-03-20 08:22:48,078 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 08:22:48,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:22:48,079 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:48,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 64 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:22:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 08:22:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2022-03-20 08:22:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.309090909090909) internal successors, (72), 56 states have internal predecessors, (72), 42 states have call successors, (42), 8 states have call predecessors, (42), 7 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 08:22:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 155 transitions. [2022-03-20 08:22:48,093 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 155 transitions. Word has length 20 [2022-03-20 08:22:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:48,093 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 155 transitions. [2022-03-20 08:22:48,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:22:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 155 transitions. [2022-03-20 08:22:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 08:22:48,094 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:48,094 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:48,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 08:22:48,094 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:48,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:48,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1922571531, now seen corresponding path program 1 times [2022-03-20 08:22:48,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:48,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344095983] [2022-03-20 08:22:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:48,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:22:48,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:48,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344095983] [2022-03-20 08:22:48,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344095983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:48,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:48,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 08:22:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675635092] [2022-03-20 08:22:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:48,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:22:48,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:48,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:22:48,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:22:48,159 INFO L87 Difference]: Start difference. First operand 105 states and 155 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:22:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:48,481 INFO L93 Difference]: Finished difference Result 159 states and 244 transitions. [2022-03-20 08:22:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:22:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 08:22:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:48,483 INFO L225 Difference]: With dead ends: 159 [2022-03-20 08:22:48,483 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 08:22:48,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:22:48,484 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 96 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:48,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 66 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 08:22:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 08:22:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2022-03-20 08:22:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 73 states have internal predecessors, (95), 62 states have call successors, (62), 9 states have call predecessors, (62), 8 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 08:22:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 218 transitions. [2022-03-20 08:22:48,510 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 218 transitions. Word has length 20 [2022-03-20 08:22:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:48,511 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 218 transitions. [2022-03-20 08:22:48,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:22:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 218 transitions. [2022-03-20 08:22:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 08:22:48,512 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:48,512 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:48,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 08:22:48,512 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash -696908702, now seen corresponding path program 1 times [2022-03-20 08:22:48,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:48,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811996852] [2022-03-20 08:22:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:48,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:22:48,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:48,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811996852] [2022-03-20 08:22:48,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811996852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:48,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:48,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:22:48,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786344964] [2022-03-20 08:22:48,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:48,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:22:48,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:48,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:22:48,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:22:48,536 INFO L87 Difference]: Start difference. First operand 141 states and 218 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:22:48,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:48,644 INFO L93 Difference]: Finished difference Result 278 states and 440 transitions. [2022-03-20 08:22:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:22:48,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 08:22:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:48,647 INFO L225 Difference]: With dead ends: 278 [2022-03-20 08:22:48,647 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 08:22:48,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 08:22:48,648 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 40 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:48,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 61 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:22:48,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 08:22:48,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-20 08:22:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 100 states have (on average 1.4) internal successors, (140), 104 states have internal predecessors, (140), 100 states have call successors, (100), 9 states have call predecessors, (100), 8 states have return successors, (99), 95 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-20 08:22:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 339 transitions. [2022-03-20 08:22:48,676 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 339 transitions. Word has length 20 [2022-03-20 08:22:48,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:48,677 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 339 transitions. [2022-03-20 08:22:48,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:22:48,677 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 339 transitions. [2022-03-20 08:22:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 08:22:48,678 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:48,678 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:48,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 08:22:48,678 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:48,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2078992758, now seen corresponding path program 1 times [2022-03-20 08:22:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:48,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186370830] [2022-03-20 08:22:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:48,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:22:48,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:48,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186370830] [2022-03-20 08:22:48,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186370830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:48,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:48,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:22:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103839571] [2022-03-20 08:22:48,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:48,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:22:48,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:22:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:22:48,737 INFO L87 Difference]: Start difference. First operand 209 states and 339 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:22:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:48,886 INFO L93 Difference]: Finished difference Result 234 states and 363 transitions. [2022-03-20 08:22:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:22:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 08:22:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:48,888 INFO L225 Difference]: With dead ends: 234 [2022-03-20 08:22:48,888 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 08:22:48,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:22:48,889 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:48,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 61 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:22:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 08:22:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-03-20 08:22:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 90 states have (on average 1.3888888888888888) internal successors, (125), 94 states have internal predecessors, (125), 88 states have call successors, (88), 9 states have call predecessors, (88), 8 states have return successors, (87), 83 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 08:22:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 300 transitions. [2022-03-20 08:22:48,924 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 300 transitions. Word has length 20 [2022-03-20 08:22:48,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:48,925 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 300 transitions. [2022-03-20 08:22:48,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:22:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 300 transitions. [2022-03-20 08:22:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 08:22:48,925 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:48,926 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:48,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 08:22:48,926 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:48,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1238440984, now seen corresponding path program 1 times [2022-03-20 08:22:48,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:48,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367399878] [2022-03-20 08:22:48,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:48,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:22:48,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:48,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367399878] [2022-03-20 08:22:48,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367399878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:48,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:48,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 08:22:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381791993] [2022-03-20 08:22:48,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:48,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 08:22:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 08:22:48,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 08:22:48,968 INFO L87 Difference]: Start difference. First operand 187 states and 300 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 08:22:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:49,223 INFO L93 Difference]: Finished difference Result 221 states and 352 transitions. [2022-03-20 08:22:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:22:49,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-20 08:22:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:49,225 INFO L225 Difference]: With dead ends: 221 [2022-03-20 08:22:49,225 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 08:22:49,226 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 08:22:49,226 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:49,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 61 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:22:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 08:22:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 201. [2022-03-20 08:22:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 97 states have (on average 1.3814432989690721) internal successors, (134), 103 states have internal predecessors, (134), 94 states have call successors, (94), 10 states have call predecessors, (94), 9 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-03-20 08:22:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 321 transitions. [2022-03-20 08:22:49,245 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 321 transitions. Word has length 27 [2022-03-20 08:22:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:49,245 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 321 transitions. [2022-03-20 08:22:49,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 08:22:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 321 transitions. [2022-03-20 08:22:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 08:22:49,246 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:49,246 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:49,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 08:22:49,246 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash 511466180, now seen corresponding path program 1 times [2022-03-20 08:22:49,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:49,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143910600] [2022-03-20 08:22:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:49,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:49,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:49,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:49,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:22:49,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:49,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143910600] [2022-03-20 08:22:49,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143910600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:49,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:49,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:22:49,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330624929] [2022-03-20 08:22:49,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:49,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:22:49,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:49,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:22:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:22:49,281 INFO L87 Difference]: Start difference. First operand 201 states and 321 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 08:22:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:49,617 INFO L93 Difference]: Finished difference Result 524 states and 858 transitions. [2022-03-20 08:22:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:22:49,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-20 08:22:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:49,619 INFO L225 Difference]: With dead ends: 524 [2022-03-20 08:22:49,619 INFO L226 Difference]: Without dead ends: 370 [2022-03-20 08:22:49,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-20 08:22:49,621 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 130 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:49,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 43 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 08:22:49,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-03-20 08:22:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 201. [2022-03-20 08:22:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 97 states have (on average 1.3608247422680413) internal successors, (132), 103 states have internal predecessors, (132), 94 states have call successors, (94), 10 states have call predecessors, (94), 9 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-03-20 08:22:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 319 transitions. [2022-03-20 08:22:49,643 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 319 transitions. Word has length 29 [2022-03-20 08:22:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:49,643 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 319 transitions. [2022-03-20 08:22:49,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 08:22:49,643 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 319 transitions. [2022-03-20 08:22:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 08:22:49,644 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:49,644 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:49,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 08:22:49,644 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash 810931569, now seen corresponding path program 1 times [2022-03-20 08:22:49,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:49,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589697129] [2022-03-20 08:22:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:49,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:49,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:49,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:49,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:49,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 08:22:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:22:49,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:49,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589697129] [2022-03-20 08:22:49,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589697129] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:49,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:49,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 08:22:49,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818042994] [2022-03-20 08:22:49,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:49,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 08:22:49,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:49,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 08:22:49,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 08:22:49,698 INFO L87 Difference]: Start difference. First operand 201 states and 319 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 08:22:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:49,960 INFO L93 Difference]: Finished difference Result 295 states and 475 transitions. [2022-03-20 08:22:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:22:49,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 08:22:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:49,974 INFO L225 Difference]: With dead ends: 295 [2022-03-20 08:22:49,975 INFO L226 Difference]: Without dead ends: 293 [2022-03-20 08:22:49,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:22:49,976 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:49,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 75 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:22:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-20 08:22:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 273. [2022-03-20 08:22:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 119 states have (on average 1.361344537815126) internal successors, (162), 133 states have internal predecessors, (162), 142 states have call successors, (142), 12 states have call predecessors, (142), 11 states have return successors, (141), 127 states have call predecessors, (141), 141 states have call successors, (141) [2022-03-20 08:22:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 445 transitions. [2022-03-20 08:22:50,033 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 445 transitions. Word has length 30 [2022-03-20 08:22:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:50,033 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 445 transitions. [2022-03-20 08:22:50,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 08:22:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 445 transitions. [2022-03-20 08:22:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 08:22:50,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:50,035 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 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 08:22:50,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 08:22:50,035 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash 573878194, now seen corresponding path program 1 times [2022-03-20 08:22:50,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:50,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149306591] [2022-03-20 08:22:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:50,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 08:22:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:22:50,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:50,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149306591] [2022-03-20 08:22:50,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149306591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:50,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:50,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 08:22:50,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472987767] [2022-03-20 08:22:50,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:50,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:22:50,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:50,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:22:50,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:22:50,113 INFO L87 Difference]: Start difference. First operand 273 states and 445 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 08:22:50,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:50,366 INFO L93 Difference]: Finished difference Result 321 states and 520 transitions. [2022-03-20 08:22:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:22:50,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-03-20 08:22:50,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:50,368 INFO L225 Difference]: With dead ends: 321 [2022-03-20 08:22:50,368 INFO L226 Difference]: Without dead ends: 319 [2022-03-20 08:22:50,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:22:50,369 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:50,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 66 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:22:50,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-20 08:22:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 291. [2022-03-20 08:22:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 126 states have (on average 1.3571428571428572) internal successors, (171), 142 states have internal predecessors, (171), 152 states have call successors, (152), 13 states have call predecessors, (152), 12 states have return successors, (151), 135 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 08:22:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 474 transitions. [2022-03-20 08:22:50,400 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 474 transitions. Word has length 32 [2022-03-20 08:22:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:50,400 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 474 transitions. [2022-03-20 08:22:50,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 08:22:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 474 transitions. [2022-03-20 08:22:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 08:22:50,401 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:50,401 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 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 08:22:50,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 08:22:50,401 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash 630142183, now seen corresponding path program 1 times [2022-03-20 08:22:50,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:50,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906853863] [2022-03-20 08:22:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:50,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 08:22:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 08:22:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 08:22:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 08:22:50,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:50,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906853863] [2022-03-20 08:22:50,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906853863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:50,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:50,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 08:22:50,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625449347] [2022-03-20 08:22:50,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:50,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:22:50,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:50,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:22:50,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:22:50,459 INFO L87 Difference]: Start difference. First operand 291 states and 474 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 08:22:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:50,719 INFO L93 Difference]: Finished difference Result 333 states and 531 transitions. [2022-03-20 08:22:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:22:50,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 08:22:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:50,721 INFO L225 Difference]: With dead ends: 333 [2022-03-20 08:22:50,721 INFO L226 Difference]: Without dead ends: 331 [2022-03-20 08:22:50,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:22:50,722 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:50,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:22:50,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-20 08:22:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 295. [2022-03-20 08:22:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 129 states have (on average 1.3488372093023255) internal successors, (174), 145 states have internal predecessors, (174), 152 states have call successors, (152), 14 states have call predecessors, (152), 13 states have return successors, (151), 135 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 08:22:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 477 transitions. [2022-03-20 08:22:50,755 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 477 transitions. Word has length 42 [2022-03-20 08:22:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:50,755 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 477 transitions. [2022-03-20 08:22:50,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 08:22:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 477 transitions. [2022-03-20 08:22:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 08:22:50,756 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:50,756 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 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 08:22:50,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 08:22:50,756 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1507674262, now seen corresponding path program 1 times [2022-03-20 08:22:50,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:50,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956714524] [2022-03-20 08:22:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:50,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 08:22:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 08:22:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:22:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:50,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956714524] [2022-03-20 08:22:50,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956714524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:50,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:50,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 08:22:50,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574664353] [2022-03-20 08:22:50,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:50,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:22:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:22:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:22:50,799 INFO L87 Difference]: Start difference. First operand 295 states and 477 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 08:22:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:50,966 INFO L93 Difference]: Finished difference Result 301 states and 482 transitions. [2022-03-20 08:22:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:22:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-03-20 08:22:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:50,968 INFO L225 Difference]: With dead ends: 301 [2022-03-20 08:22:50,968 INFO L226 Difference]: Without dead ends: 299 [2022-03-20 08:22:50,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:22:50,969 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:50,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 57 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:22:50,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-20 08:22:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-03-20 08:22:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 132 states have (on average 1.3409090909090908) internal successors, (177), 148 states have internal predecessors, (177), 152 states have call successors, (152), 15 states have call predecessors, (152), 14 states have return successors, (151), 135 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 08:22:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 480 transitions. [2022-03-20 08:22:51,001 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 480 transitions. Word has length 42 [2022-03-20 08:22:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:51,001 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 480 transitions. [2022-03-20 08:22:51,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 08:22:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 480 transitions. [2022-03-20 08:22:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 08:22:51,002 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:51,002 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:51,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 08:22:51,002 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:51,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:51,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1060746045, now seen corresponding path program 1 times [2022-03-20 08:22:51,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:51,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303190068] [2022-03-20 08:22:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:51,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 08:22:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 08:22:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:22:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 08:22:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 08:22:51,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:51,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303190068] [2022-03-20 08:22:51,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303190068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:51,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:22:51,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 08:22:51,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540222627] [2022-03-20 08:22:51,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:51,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:22:51,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:51,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:22:51,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:22:51,056 INFO L87 Difference]: Start difference. First operand 299 states and 480 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 08:22:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:51,315 INFO L93 Difference]: Finished difference Result 333 states and 529 transitions. [2022-03-20 08:22:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 08:22:51,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2022-03-20 08:22:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:51,317 INFO L225 Difference]: With dead ends: 333 [2022-03-20 08:22:51,317 INFO L226 Difference]: Without dead ends: 331 [2022-03-20 08:22:51,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-20 08:22:51,318 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 78 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:51,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 66 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:22:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-20 08:22:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 178. [2022-03-20 08:22:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 94 states have internal predecessors, (109), 78 states have call successors, (78), 14 states have call predecessors, (78), 13 states have return successors, (77), 69 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 08:22:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 264 transitions. [2022-03-20 08:22:51,340 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 264 transitions. Word has length 54 [2022-03-20 08:22:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:51,340 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 264 transitions. [2022-03-20 08:22:51,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 08:22:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 264 transitions. [2022-03-20 08:22:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 08:22:51,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:51,341 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:22:51,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 08:22:51,341 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1039189609, now seen corresponding path program 1 times [2022-03-20 08:22:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:51,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831956177] [2022-03-20 08:22:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:51,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 08:22:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 08:22:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 08:22:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:22:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 08:22:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-20 08:22:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 08:22:51,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:51,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831956177] [2022-03-20 08:22:51,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831956177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:22:51,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973180533] [2022-03-20 08:22:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:51,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:22:51,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:22:51,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:22:51,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:22:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:51,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 08:22:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:22:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-20 08:22:51,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:22:51,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973180533] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:51,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:22:51,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-03-20 08:22:51,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996370536] [2022-03-20 08:22:51,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:51,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:22:51,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:22:51,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:22:51,655 INFO L87 Difference]: Start difference. First operand 178 states and 264 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 08:22:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:51,884 INFO L93 Difference]: Finished difference Result 509 states and 805 transitions. [2022-03-20 08:22:51,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:22:51,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-03-20 08:22:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:51,887 INFO L225 Difference]: With dead ends: 509 [2022-03-20 08:22:51,887 INFO L226 Difference]: Without dead ends: 339 [2022-03-20 08:22:51,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 08:22:51,888 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 35 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:51,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 279 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:22:51,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-20 08:22:51,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 315. [2022-03-20 08:22:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 153 states have internal predecessors, (184), 164 states have call successors, (164), 14 states have call predecessors, (164), 13 states have return successors, (163), 147 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-20 08:22:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 511 transitions. [2022-03-20 08:22:51,958 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 511 transitions. Word has length 62 [2022-03-20 08:22:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:51,959 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 511 transitions. [2022-03-20 08:22:51,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 08:22:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 511 transitions. [2022-03-20 08:22:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 08:22:51,960 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:51,960 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 08:22:51,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 08:22:52,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 08:22:52,195 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:52,195 INFO L85 PathProgramCache]: Analyzing trace with hash 544844568, now seen corresponding path program 1 times [2022-03-20 08:22:52,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:52,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446681056] [2022-03-20 08:22:52,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:52,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 08:22:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 08:22:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 08:22:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:22:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-20 08:22:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 08:22:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 08:22:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 08:22:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 08:22:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 08:22:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 08:22:52,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:52,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446681056] [2022-03-20 08:22:52,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446681056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:22:52,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062096782] [2022-03-20 08:22:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:52,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:22:52,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:22:52,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:22:52,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:22:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 08:22:52,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:22:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-03-20 08:22:52,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:22:52,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062096782] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:52,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:22:52,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-03-20 08:22:52,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786422422] [2022-03-20 08:22:52,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:52,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 08:22:52,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:52,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 08:22:52,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:22:52,726 INFO L87 Difference]: Start difference. First operand 315 states and 511 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 08:22:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:52,966 INFO L93 Difference]: Finished difference Result 583 states and 930 transitions. [2022-03-20 08:22:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 08:22:52,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2022-03-20 08:22:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:52,968 INFO L225 Difference]: With dead ends: 583 [2022-03-20 08:22:52,968 INFO L226 Difference]: Without dead ends: 307 [2022-03-20 08:22:52,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-20 08:22:52,970 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 29 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:52,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 277 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:22:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-20 08:22:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 271. [2022-03-20 08:22:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 125 states have (on average 1.312) internal successors, (164), 137 states have internal predecessors, (164), 132 states have call successors, (132), 14 states have call predecessors, (132), 13 states have return successors, (131), 119 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 08:22:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 427 transitions. [2022-03-20 08:22:53,034 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 427 transitions. Word has length 84 [2022-03-20 08:22:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:53,034 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 427 transitions. [2022-03-20 08:22:53,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 08:22:53,035 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 427 transitions. [2022-03-20 08:22:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 08:22:53,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:53,036 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 08:22:53,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:22:53,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 08:22:53,265 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:53,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1314014583, now seen corresponding path program 1 times [2022-03-20 08:22:53,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:53,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073451467] [2022-03-20 08:22:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:53,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 08:22:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 08:22:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 08:22:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:22:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-20 08:22:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 08:22:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 08:22:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 08:22:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 08:22:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 08:22:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 08:22:53,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:53,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073451467] [2022-03-20 08:22:53,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073451467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:22:53,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652925983] [2022-03-20 08:22:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:53,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:22:53,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:22:53,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:22:53,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:22:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:53,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 08:22:53,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:22:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-03-20 08:22:53,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:22:53,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652925983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:22:53,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:22:53,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-03-20 08:22:53,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815127955] [2022-03-20 08:22:53,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:22:53,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:22:53,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:53,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:22:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:22:53,734 INFO L87 Difference]: Start difference. First operand 271 states and 427 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 08:22:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:53,912 INFO L93 Difference]: Finished difference Result 501 states and 784 transitions. [2022-03-20 08:22:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:22:53,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2022-03-20 08:22:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:53,914 INFO L225 Difference]: With dead ends: 501 [2022-03-20 08:22:53,914 INFO L226 Difference]: Without dead ends: 225 [2022-03-20 08:22:53,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:22:53,915 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 20 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:53,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 218 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:22:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-20 08:22:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 214. [2022-03-20 08:22:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 100 states have (on average 1.28) internal successors, (128), 110 states have internal predecessors, (128), 100 states have call successors, (100), 14 states have call predecessors, (100), 13 states have return successors, (99), 89 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-20 08:22:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 327 transitions. [2022-03-20 08:22:53,945 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 327 transitions. Word has length 84 [2022-03-20 08:22:53,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:53,946 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 327 transitions. [2022-03-20 08:22:53,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 08:22:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 327 transitions. [2022-03-20 08:22:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 08:22:53,947 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:53,947 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 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 08:22:53,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:22:54,156 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:22:54,157 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:54,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1425381294, now seen corresponding path program 1 times [2022-03-20 08:22:54,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:54,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915953265] [2022-03-20 08:22:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:54,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 08:22:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 08:22:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:22:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 08:22:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 08:22:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 08:22:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 08:22:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 08:22:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 08:22:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 08:22:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 08:22:54,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:54,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915953265] [2022-03-20 08:22:54,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915953265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:22:54,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504474617] [2022-03-20 08:22:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:54,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:22:54,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:22:54,246 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:22:54,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:22:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 08:22:54,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:22:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 08:22:54,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:22:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-20 08:22:54,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504474617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:22:54,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:22:54,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2022-03-20 08:22:54,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276710462] [2022-03-20 08:22:54,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:22:54,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 08:22:54,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:54,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 08:22:54,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-03-20 08:22:54,683 INFO L87 Difference]: Start difference. First operand 214 states and 327 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 7 states have call successors, (36), 4 states have call predecessors, (36), 2 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-20 08:22:56,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:22:56,003 INFO L93 Difference]: Finished difference Result 495 states and 744 transitions. [2022-03-20 08:22:56,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 08:22:56,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 7 states have call successors, (36), 4 states have call predecessors, (36), 2 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 89 [2022-03-20 08:22:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:22:56,005 INFO L225 Difference]: With dead ends: 495 [2022-03-20 08:22:56,005 INFO L226 Difference]: Without dead ends: 325 [2022-03-20 08:22:56,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=493, Invalid=1399, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 08:22:56,006 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 168 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 817 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 08:22:56,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 170 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [817 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 08:22:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-03-20 08:22:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 245. [2022-03-20 08:22:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 122 states have (on average 1.2540983606557377) internal successors, (153), 132 states have internal predecessors, (153), 107 states have call successors, (107), 16 states have call predecessors, (107), 15 states have return successors, (106), 96 states have call predecessors, (106), 106 states have call successors, (106) [2022-03-20 08:22:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 366 transitions. [2022-03-20 08:22:56,062 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 366 transitions. Word has length 89 [2022-03-20 08:22:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:22:56,063 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 366 transitions. [2022-03-20 08:22:56,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 7 states have call successors, (36), 4 states have call predecessors, (36), 2 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-20 08:22:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 366 transitions. [2022-03-20 08:22:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 08:22:56,064 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:22:56,064 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:22:56,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:22:56,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:22:56,284 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:22:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:22:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1303481827, now seen corresponding path program 1 times [2022-03-20 08:22:56,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:22:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386142534] [2022-03-20 08:22:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:56,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:22:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:22:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:22:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:22:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 08:22:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 08:22:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:22:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 08:22:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 08:22:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-20 08:22:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 08:22:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 08:22:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 08:22:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 08:22:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 08:22:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 08:22:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 08:22:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 08:22:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-20 08:22:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 47 proven. 8 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 08:22:56,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:22:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386142534] [2022-03-20 08:22:56,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386142534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:22:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498132727] [2022-03-20 08:22:56,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:22:56,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:22:56,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:22:56,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:22:56,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:22:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:22:56,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 08:22:56,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:22:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 210 proven. 7 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-03-20 08:22:56,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:22:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 47 proven. 8 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 08:22:57,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498132727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:22:57,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:22:57,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-20 08:22:57,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521141994] [2022-03-20 08:22:57,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:22:57,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 08:22:57,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:22:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 08:22:57,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-20 08:22:57,158 INFO L87 Difference]: Start difference. First operand 245 states and 366 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 13 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2022-03-20 08:23:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:01,024 INFO L93 Difference]: Finished difference Result 899 states and 1410 transitions. [2022-03-20 08:23:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 08:23:01,025 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 13 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) Word has length 116 [2022-03-20 08:23:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:01,027 INFO L225 Difference]: With dead ends: 899 [2022-03-20 08:23:01,027 INFO L226 Difference]: Without dead ends: 517 [2022-03-20 08:23:01,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1625, Invalid=5181, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 08:23:01,030 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 403 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3739 mSolverCounterSat, 1435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 5174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1435 IncrementalHoareTripleChecker+Valid, 3739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:01,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 176 Invalid, 5174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1435 Valid, 3739 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 08:23:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-03-20 08:23:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 374. [2022-03-20 08:23:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 171 states have (on average 1.263157894736842) internal successors, (216), 185 states have internal predecessors, (216), 188 states have call successors, (188), 15 states have call predecessors, (188), 14 states have return successors, (187), 173 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-20 08:23:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 591 transitions. [2022-03-20 08:23:01,100 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 591 transitions. Word has length 116 [2022-03-20 08:23:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:01,101 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 591 transitions. [2022-03-20 08:23:01,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 13 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2022-03-20 08:23:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 591 transitions. [2022-03-20 08:23:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 08:23:01,102 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:01,102 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:01,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:23:01,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:01,319 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:01,320 INFO L85 PathProgramCache]: Analyzing trace with hash -673023202, now seen corresponding path program 1 times [2022-03-20 08:23:01,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:01,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245493339] [2022-03-20 08:23:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:01,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:23:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:23:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 08:23:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 08:23:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:23:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 08:23:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 08:23:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-20 08:23:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 08:23:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 08:23:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 08:23:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 08:23:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 08:23:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 08:23:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 08:23:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 08:23:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-20 08:23:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 08:23:01,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:01,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245493339] [2022-03-20 08:23:01,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245493339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:23:01,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435647475] [2022-03-20 08:23:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:01,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:01,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:23:01,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:23:01,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:23:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:01,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 08:23:01,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:23:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 08:23:01,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:23:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 08:23:01,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435647475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:23:01,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:23:01,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-03-20 08:23:01,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188084076] [2022-03-20 08:23:01,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:23:01,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 08:23:01,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 08:23:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-20 08:23:01,979 INFO L87 Difference]: Start difference. First operand 374 states and 591 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 9 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2022-03-20 08:23:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:03,884 INFO L93 Difference]: Finished difference Result 909 states and 1444 transitions. [2022-03-20 08:23:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 08:23:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 9 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) Word has length 116 [2022-03-20 08:23:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:03,889 INFO L225 Difference]: With dead ends: 909 [2022-03-20 08:23:03,890 INFO L226 Difference]: Without dead ends: 786 [2022-03-20 08:23:03,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=509, Invalid=1653, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 08:23:03,891 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 370 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 1211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 3630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1211 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:03,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 134 Invalid, 3630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1211 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 08:23:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-03-20 08:23:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 418. [2022-03-20 08:23:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 186 states have (on average 1.2741935483870968) internal successors, (237), 208 states have internal predecessors, (237), 214 states have call successors, (214), 18 states have call predecessors, (214), 17 states have return successors, (213), 191 states have call predecessors, (213), 213 states have call successors, (213) [2022-03-20 08:23:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 664 transitions. [2022-03-20 08:23:03,975 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 664 transitions. Word has length 116 [2022-03-20 08:23:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:03,975 INFO L478 AbstractCegarLoop]: Abstraction has 418 states and 664 transitions. [2022-03-20 08:23:03,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 9 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2022-03-20 08:23:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 664 transitions. [2022-03-20 08:23:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 08:23:03,977 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:23:03,978 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 31, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:23:03,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 08:23:04,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:04,196 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:23:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:23:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1294944744, now seen corresponding path program 2 times [2022-03-20 08:23:04,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:23:04,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146789362] [2022-03-20 08:23:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:23:04,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:23:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:23:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 08:23:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:23:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 08:23:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 08:23:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 08:23:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:23:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 08:23:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-20 08:23:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 08:23:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 08:23:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 08:23:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-20 08:23:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 08:23:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 08:23:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-20 08:23:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-03-20 08:23:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-20 08:23:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 08:23:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-20 08:23:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-20 08:23:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-20 08:23:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-20 08:23:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-20 08:23:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-20 08:23:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-20 08:23:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-20 08:23:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-20 08:23:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-03-20 08:23:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-03-20 08:23:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-03-20 08:23:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-03-20 08:23:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:23:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1986 backedges. 62 proven. 47 refuted. 0 times theorem prover too weak. 1877 trivial. 0 not checked. [2022-03-20 08:23:04,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:23:04,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146789362] [2022-03-20 08:23:04,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146789362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:23:04,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480613587] [2022-03-20 08:23:04,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:23:04,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:04,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:23:04,358 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:23:04,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:23:04,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:23:04,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:23:04,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 08:23:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:23:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1986 backedges. 430 proven. 26 refuted. 0 times theorem prover too weak. 1530 trivial. 0 not checked. [2022-03-20 08:23:05,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:23:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1986 backedges. 81 proven. 45 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-20 08:23:05,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480613587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:23:05,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:23:05,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-03-20 08:23:05,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983032878] [2022-03-20 08:23:05,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:23:05,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 08:23:05,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:23:05,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 08:23:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-20 08:23:05,592 INFO L87 Difference]: Start difference. First operand 418 states and 664 transitions. Second operand has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 25 states have internal predecessors, (95), 15 states have call successors, (88), 4 states have call predecessors, (88), 2 states have return successors, (84), 15 states have call predecessors, (84), 15 states have call successors, (84) [2022-03-20 08:23:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:23:15,652 INFO L93 Difference]: Finished difference Result 1823 states and 2985 transitions. [2022-03-20 08:23:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-20 08:23:15,653 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 25 states have internal predecessors, (95), 15 states have call successors, (88), 4 states have call predecessors, (88), 2 states have return successors, (84), 15 states have call predecessors, (84), 15 states have call successors, (84) Word has length 195 [2022-03-20 08:23:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:23:15,654 INFO L225 Difference]: With dead ends: 1823 [2022-03-20 08:23:15,654 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:23:15,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7177 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3750, Invalid=16842, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 08:23:15,664 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 729 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 7215 mSolverCounterSat, 3484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 10699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3484 IncrementalHoareTripleChecker+Valid, 7215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-20 08:23:15,664 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 212 Invalid, 10699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3484 Valid, 7215 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-20 08:23:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:23:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:23:15,665 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 08:23:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:23:15,665 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 195 [2022-03-20 08:23:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:23:15,666 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:23:15,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 25 states have internal predecessors, (95), 15 states have call successors, (88), 4 states have call predecessors, (88), 2 states have return successors, (84), 15 states have call predecessors, (84), 15 states have call successors, (84) [2022-03-20 08:23:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:23:15,669 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:23:15,670 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:23:15,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:23:15,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:23:15,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 08:23:28,641 WARN L232 SmtUtils]: Spent 11.88s on a formula simplification. DAG size of input: 380 DAG size of output: 381 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)