/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 01:31:23,485 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 01:31:23,536 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 01:31:23,540 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 01:31:23,541 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 01:31:23,558 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 01:31:23,559 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 01:31:23,559 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 01:31:23,559 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 01:31:23,560 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 01:31:23,563 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 01:31:23,563 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 01:31:23,564 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 01:31:23,567 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 01:31:23,567 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 01:31:23,568 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 01:31:23,568 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 01:31:23,569 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 01:31:23,569 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 01:31:23,569 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 01:31:23,569 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 01:31:23,570 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 01:31:23,570 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 01:31:23,570 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 01:31:23,570 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 01:31:23,570 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 01:31:23,570 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 01:31:23,570 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 01:31:23,571 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 01:31:23,571 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 01:31:23,572 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 01:31:23,572 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 01:31:23,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 01:31:23,572 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 01:31:23,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 01:31:23,572 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 01:31:23,573 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 01:31:23,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 01:31:23,573 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 01:31:23,573 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 01:31:23,573 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 01:31:23,573 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 01:31:23,573 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 01:31:23,574 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 01:31:23,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 01:31:23,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 01:31:23,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 01:31:23,814 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 01:31:23,814 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 01:31:23,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2023-12-19 01:31:24,858 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 01:31:25,060 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 01:31:25,061 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2023-12-19 01:31:25,077 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/486d04cd1/5cb80abf85c448c390d6c0aa160b563e/FLAGfebfb4aef [2023-12-19 01:31:25,089 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/486d04cd1/5cb80abf85c448c390d6c0aa160b563e [2023-12-19 01:31:25,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 01:31:25,092 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 01:31:25,094 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 01:31:25,094 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 01:31:25,098 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 01:31:25,098 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143ed907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25, skipping insertion in model container [2023-12-19 01:31:25,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,139 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 01:31:25,270 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2023-12-19 01:31:25,302 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2023-12-19 01:31:25,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 01:31:25,373 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 01:31:25,388 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2023-12-19 01:31:25,413 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2023-12-19 01:31:25,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 01:31:25,462 INFO L206 MainTranslator]: Completed translation [2023-12-19 01:31:25,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25 WrapperNode [2023-12-19 01:31:25,463 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 01:31:25,464 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 01:31:25,464 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 01:31:25,464 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 01:31:25,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,486 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,534 INFO L138 Inliner]: procedures = 64, calls = 73, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 849 [2023-12-19 01:31:25,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 01:31:25,535 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 01:31:25,535 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 01:31:25,535 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 01:31:25,557 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,561 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,591 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 01:31:25,592 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,592 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,600 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,607 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,622 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,625 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,629 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 01:31:25,630 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 01:31:25,630 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 01:31:25,630 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 01:31:25,630 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (1/1) ... [2023-12-19 01:31:25,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 01:31:25,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 01:31:25,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 01:31:25,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 01:31:25,680 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-19 01:31:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-19 01:31:25,680 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-12-19 01:31:25,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 01:31:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-12-19 01:31:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-19 01:31:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-19 01:31:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-19 01:31:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-19 01:31:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-19 01:31:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-19 01:31:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-19 01:31:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-19 01:31:25,683 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-19 01:31:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-19 01:31:25,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 01:31:25,683 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-19 01:31:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-19 01:31:25,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 01:31:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 01:31:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-19 01:31:25,684 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-19 01:31:25,684 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-12-19 01:31:25,684 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-12-19 01:31:25,801 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 01:31:25,805 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 01:31:26,391 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 01:31:26,464 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 01:31:26,464 INFO L309 CfgBuilder]: Removed 15 assume(true) statements. [2023-12-19 01:31:26,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 01:31:26 BoogieIcfgContainer [2023-12-19 01:31:26,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 01:31:26,466 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 01:31:26,466 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 01:31:26,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 01:31:26,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 01:31:25" (1/3) ... [2023-12-19 01:31:26,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80cee75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 01:31:26, skipping insertion in model container [2023-12-19 01:31:26,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:31:25" (2/3) ... [2023-12-19 01:31:26,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80cee75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 01:31:26, skipping insertion in model container [2023-12-19 01:31:26,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 01:31:26" (3/3) ... [2023-12-19 01:31:26,471 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2023-12-19 01:31:26,484 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 01:31:26,485 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-19 01:31:26,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 01:31:26,541 INFO L357 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28f8a996, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 01:31:26,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-19 01:31:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 327 states, 284 states have (on average 1.7147887323943662) internal successors, (487), 291 states have internal predecessors, (487), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-19 01:31:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 01:31:26,554 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:26,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:26,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:26,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:26,559 INFO L85 PathProgramCache]: Analyzing trace with hash 891848926, now seen corresponding path program 1 times [2023-12-19 01:31:26,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:26,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136671953] [2023-12-19 01:31:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:26,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:26,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 01:31:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:26,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 01:31:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:26,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:26,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136671953] [2023-12-19 01:31:26,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136671953] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:26,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:26,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 01:31:26,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496019044] [2023-12-19 01:31:26,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:26,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 01:31:26,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 01:31:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 01:31:26,866 INFO L87 Difference]: Start difference. First operand has 327 states, 284 states have (on average 1.7147887323943662) internal successors, (487), 291 states have internal predecessors, (487), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 01:31:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:27,359 INFO L93 Difference]: Finished difference Result 643 states and 1072 transitions. [2023-12-19 01:31:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 01:31:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-12-19 01:31:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:27,369 INFO L225 Difference]: With dead ends: 643 [2023-12-19 01:31:27,369 INFO L226 Difference]: Without dead ends: 329 [2023-12-19 01:31:27,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 01:31:27,376 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 287 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:27,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 718 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 01:31:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-12-19 01:31:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 321. [2023-12-19 01:31:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 281 states have (on average 1.597864768683274) internal successors, (449), 285 states have internal predecessors, (449), 30 states have call successors, (30), 10 states have call predecessors, (30), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-19 01:31:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 505 transitions. [2023-12-19 01:31:27,419 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 505 transitions. Word has length 37 [2023-12-19 01:31:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:27,420 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 505 transitions. [2023-12-19 01:31:27,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 01:31:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 505 transitions. [2023-12-19 01:31:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 01:31:27,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:27,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:27,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 01:31:27,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:27,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:27,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1159135072, now seen corresponding path program 1 times [2023-12-19 01:31:27,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:27,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94501134] [2023-12-19 01:31:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:27,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:27,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 01:31:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:27,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 01:31:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:27,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:27,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94501134] [2023-12-19 01:31:27,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94501134] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:27,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:27,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 01:31:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913968712] [2023-12-19 01:31:27,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:27,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 01:31:27,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 01:31:27,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 01:31:27,508 INFO L87 Difference]: Start difference. First operand 321 states and 505 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 01:31:27,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:27,836 INFO L93 Difference]: Finished difference Result 440 states and 677 transitions. [2023-12-19 01:31:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 01:31:27,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-12-19 01:31:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:27,842 INFO L225 Difference]: With dead ends: 440 [2023-12-19 01:31:27,842 INFO L226 Difference]: Without dead ends: 384 [2023-12-19 01:31:27,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 01:31:27,844 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 665 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:27,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 578 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 01:31:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-12-19 01:31:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 378. [2023-12-19 01:31:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 331 states have (on average 1.5649546827794563) internal successors, (518), 336 states have internal predecessors, (518), 34 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2023-12-19 01:31:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 588 transitions. [2023-12-19 01:31:27,882 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 588 transitions. Word has length 37 [2023-12-19 01:31:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:27,883 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 588 transitions. [2023-12-19 01:31:27,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 01:31:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 588 transitions. [2023-12-19 01:31:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-19 01:31:27,890 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:27,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:27,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-19 01:31:27,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:27,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1260942925, now seen corresponding path program 1 times [2023-12-19 01:31:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:27,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450707199] [2023-12-19 01:31:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:27,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:27,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 01:31:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:27,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-19 01:31:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:27,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:27,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450707199] [2023-12-19 01:31:27,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450707199] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:27,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:27,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 01:31:27,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376266583] [2023-12-19 01:31:27,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:27,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 01:31:27,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:27,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 01:31:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 01:31:27,966 INFO L87 Difference]: Start difference. First operand 378 states and 588 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 01:31:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:28,277 INFO L93 Difference]: Finished difference Result 612 states and 932 transitions. [2023-12-19 01:31:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 01:31:28,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2023-12-19 01:31:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:28,281 INFO L225 Difference]: With dead ends: 612 [2023-12-19 01:31:28,281 INFO L226 Difference]: Without dead ends: 501 [2023-12-19 01:31:28,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 01:31:28,285 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 683 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:28,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 580 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 01:31:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-12-19 01:31:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 478. [2023-12-19 01:31:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 418 states have (on average 1.5215311004784688) internal successors, (636), 424 states have internal predecessors, (636), 42 states have call successors, (42), 16 states have call predecessors, (42), 16 states have return successors, (50), 38 states have call predecessors, (50), 38 states have call successors, (50) [2023-12-19 01:31:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 728 transitions. [2023-12-19 01:31:28,321 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 728 transitions. Word has length 38 [2023-12-19 01:31:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:28,321 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 728 transitions. [2023-12-19 01:31:28,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 01:31:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 728 transitions. [2023-12-19 01:31:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-19 01:31:28,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:28,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:28,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-19 01:31:28,324 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:28,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash -143652495, now seen corresponding path program 1 times [2023-12-19 01:31:28,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:28,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522091530] [2023-12-19 01:31:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:28,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:28,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 01:31:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:28,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-19 01:31:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:28,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522091530] [2023-12-19 01:31:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522091530] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:28,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 01:31:28,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609784802] [2023-12-19 01:31:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:28,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 01:31:28,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 01:31:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 01:31:28,386 INFO L87 Difference]: Start difference. First operand 478 states and 728 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 01:31:28,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:28,725 INFO L93 Difference]: Finished difference Result 898 states and 1309 transitions. [2023-12-19 01:31:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 01:31:28,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-12-19 01:31:28,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:28,729 INFO L225 Difference]: With dead ends: 898 [2023-12-19 01:31:28,729 INFO L226 Difference]: Without dead ends: 687 [2023-12-19 01:31:28,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 01:31:28,740 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 270 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:28,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 813 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 01:31:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2023-12-19 01:31:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 583. [2023-12-19 01:31:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 511 states have (on average 1.4970645792563602) internal successors, (765), 519 states have internal predecessors, (765), 48 states have call successors, (48), 22 states have call predecessors, (48), 22 states have return successors, (56), 42 states have call predecessors, (56), 44 states have call successors, (56) [2023-12-19 01:31:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 869 transitions. [2023-12-19 01:31:28,763 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 869 transitions. Word has length 39 [2023-12-19 01:31:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:28,763 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 869 transitions. [2023-12-19 01:31:28,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 01:31:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 869 transitions. [2023-12-19 01:31:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-19 01:31:28,765 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:28,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:28,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-19 01:31:28,765 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:28,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1398437299, now seen corresponding path program 1 times [2023-12-19 01:31:28,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:28,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926265300] [2023-12-19 01:31:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:28,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:28,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 01:31:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:28,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-19 01:31:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:28,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 01:31:28,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:28,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926265300] [2023-12-19 01:31:28,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926265300] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:28,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:28,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 01:31:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977847996] [2023-12-19 01:31:28,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:28,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 01:31:28,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 01:31:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 01:31:28,841 INFO L87 Difference]: Start difference. First operand 583 states and 869 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 01:31:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:29,175 INFO L93 Difference]: Finished difference Result 888 states and 1291 transitions. [2023-12-19 01:31:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 01:31:29,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 54 [2023-12-19 01:31:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:29,178 INFO L225 Difference]: With dead ends: 888 [2023-12-19 01:31:29,178 INFO L226 Difference]: Without dead ends: 677 [2023-12-19 01:31:29,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 01:31:29,180 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 255 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:29,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 858 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 01:31:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2023-12-19 01:31:29,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 643. [2023-12-19 01:31:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 562 states have (on average 1.4697508896797153) internal successors, (826), 571 states have internal predecessors, (826), 53 states have call successors, (53), 25 states have call predecessors, (53), 26 states have return successors, (65), 47 states have call predecessors, (65), 49 states have call successors, (65) [2023-12-19 01:31:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 944 transitions. [2023-12-19 01:31:29,214 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 944 transitions. Word has length 54 [2023-12-19 01:31:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:29,216 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 944 transitions. [2023-12-19 01:31:29,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 01:31:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 944 transitions. [2023-12-19 01:31:29,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-19 01:31:29,217 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:29,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:29,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-19 01:31:29,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:29,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash 332942367, now seen corresponding path program 1 times [2023-12-19 01:31:29,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:29,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412281325] [2023-12-19 01:31:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:29,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:29,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 01:31:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:29,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 01:31:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:29,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-19 01:31:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 01:31:29,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:29,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412281325] [2023-12-19 01:31:29,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412281325] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:29,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:29,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 01:31:29,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566653592] [2023-12-19 01:31:29,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:29,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 01:31:29,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 01:31:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 01:31:29,277 INFO L87 Difference]: Start difference. First operand 643 states and 944 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 01:31:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:29,579 INFO L93 Difference]: Finished difference Result 1132 states and 1604 transitions. [2023-12-19 01:31:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 01:31:29,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2023-12-19 01:31:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:29,582 INFO L225 Difference]: With dead ends: 1132 [2023-12-19 01:31:29,582 INFO L226 Difference]: Without dead ends: 797 [2023-12-19 01:31:29,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 01:31:29,584 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 669 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:29,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 592 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 01:31:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2023-12-19 01:31:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 748. [2023-12-19 01:31:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 654 states have (on average 1.4357798165137614) internal successors, (939), 664 states have internal predecessors, (939), 60 states have call successors, (60), 30 states have call predecessors, (60), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2023-12-19 01:31:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1075 transitions. [2023-12-19 01:31:29,611 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1075 transitions. Word has length 59 [2023-12-19 01:31:29,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:29,611 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 1075 transitions. [2023-12-19 01:31:29,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 01:31:29,612 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1075 transitions. [2023-12-19 01:31:29,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-19 01:31:29,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:29,613 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:29,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-19 01:31:29,613 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:29,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:29,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1070818634, now seen corresponding path program 1 times [2023-12-19 01:31:29,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:29,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141414925] [2023-12-19 01:31:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:29,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:29,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 01:31:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:29,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 01:31:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:29,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-19 01:31:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 01:31:29,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:29,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141414925] [2023-12-19 01:31:29,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141414925] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 01:31:29,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776452484] [2023-12-19 01:31:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:29,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 01:31:29,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 01:31:29,712 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) [2023-12-19 01:31:29,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 01:31:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:29,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 01:31:29,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 01:31:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:29,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 01:31:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-19 01:31:29,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776452484] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 01:31:29,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-19 01:31:29,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2023-12-19 01:31:29,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693663852] [2023-12-19 01:31:29,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:29,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 01:31:29,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 01:31:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:31:29,996 INFO L87 Difference]: Start difference. First operand 748 states and 1075 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 01:31:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:30,140 INFO L93 Difference]: Finished difference Result 797 states and 1136 transitions. [2023-12-19 01:31:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 01:31:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2023-12-19 01:31:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:30,144 INFO L225 Difference]: With dead ends: 797 [2023-12-19 01:31:30,144 INFO L226 Difference]: Without dead ends: 794 [2023-12-19 01:31:30,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-19 01:31:30,145 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 904 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:30,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 539 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 01:31:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-12-19 01:31:30,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 747. [2023-12-19 01:31:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 654 states have (on average 1.4327217125382263) internal successors, (937), 663 states have internal predecessors, (937), 59 states have call successors, (59), 30 states have call predecessors, (59), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2023-12-19 01:31:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1072 transitions. [2023-12-19 01:31:30,173 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1072 transitions. Word has length 60 [2023-12-19 01:31:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:30,173 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1072 transitions. [2023-12-19 01:31:30,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 01:31:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1072 transitions. [2023-12-19 01:31:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-19 01:31:30,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:30,174 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:30,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 01:31:30,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 01:31:30,375 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:30,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:30,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1165496766, now seen corresponding path program 1 times [2023-12-19 01:31:30,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:30,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484493047] [2023-12-19 01:31:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:30,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:30,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 01:31:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:30,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 01:31:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:30,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-19 01:31:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 01:31:30,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:30,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484493047] [2023-12-19 01:31:30,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484493047] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 01:31:30,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600246904] [2023-12-19 01:31:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:30,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 01:31:30,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 01:31:30,456 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) [2023-12-19 01:31:30,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 01:31:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:30,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 01:31:30,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 01:31:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:30,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 01:31:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-19 01:31:30,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600246904] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 01:31:30,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 01:31:30,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2023-12-19 01:31:30,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44294073] [2023-12-19 01:31:30,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 01:31:30,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 01:31:30,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 01:31:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-19 01:31:30,766 INFO L87 Difference]: Start difference. First operand 747 states and 1072 transitions. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 9 states have internal predecessors, (134), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-19 01:31:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:31,680 INFO L93 Difference]: Finished difference Result 1949 states and 2707 transitions. [2023-12-19 01:31:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-19 01:31:31,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 9 states have internal predecessors, (134), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2023-12-19 01:31:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:31,686 INFO L225 Difference]: With dead ends: 1949 [2023-12-19 01:31:31,686 INFO L226 Difference]: Without dead ends: 1555 [2023-12-19 01:31:31,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2023-12-19 01:31:31,688 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 1281 mSDsluCounter, 1901 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:31,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1310 Valid, 2270 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 01:31:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2023-12-19 01:31:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1070. [2023-12-19 01:31:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 941 states have (on average 1.3910733262486716) internal successors, (1309), 956 states have internal predecessors, (1309), 78 states have call successors, (78), 43 states have call predecessors, (78), 49 states have return successors, (107), 71 states have call predecessors, (107), 75 states have call successors, (107) [2023-12-19 01:31:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1494 transitions. [2023-12-19 01:31:31,730 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1494 transitions. Word has length 61 [2023-12-19 01:31:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:31,730 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1494 transitions. [2023-12-19 01:31:31,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 9 states have internal predecessors, (134), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-19 01:31:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1494 transitions. [2023-12-19 01:31:31,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-19 01:31:31,733 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:31,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-12-19 01:31:31,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 01:31:31,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-19 01:31:31,940 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:31,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:31,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2109914574, now seen corresponding path program 1 times [2023-12-19 01:31:31,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:31,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325554654] [2023-12-19 01:31:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:31,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:31,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 01:31:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:31,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 01:31:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-12-19 01:31:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-19 01:31:32,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325554654] [2023-12-19 01:31:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325554654] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 01:31:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117122946] [2023-12-19 01:31:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:32,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 01:31:32,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 01:31:32,033 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) [2023-12-19 01:31:32,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 01:31:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 01:31:32,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 01:31:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-19 01:31:32,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 01:31:32,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117122946] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:32,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 01:31:32,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-19 01:31:32,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811894640] [2023-12-19 01:31:32,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:32,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 01:31:32,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 01:31:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 01:31:32,152 INFO L87 Difference]: Start difference. First operand 1070 states and 1494 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-19 01:31:32,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:32,223 INFO L93 Difference]: Finished difference Result 1633 states and 2251 transitions. [2023-12-19 01:31:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 01:31:32,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 78 [2023-12-19 01:31:32,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:32,226 INFO L225 Difference]: With dead ends: 1633 [2023-12-19 01:31:32,226 INFO L226 Difference]: Without dead ends: 978 [2023-12-19 01:31:32,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 01:31:32,228 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 469 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:32,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 555 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 01:31:32,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2023-12-19 01:31:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 966. [2023-12-19 01:31:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 850 states have (on average 1.3929411764705881) internal successors, (1184), 865 states have internal predecessors, (1184), 71 states have call successors, (71), 38 states have call predecessors, (71), 43 states have return successors, (96), 63 states have call predecessors, (96), 68 states have call successors, (96) [2023-12-19 01:31:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1351 transitions. [2023-12-19 01:31:32,292 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1351 transitions. Word has length 78 [2023-12-19 01:31:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:32,292 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 1351 transitions. [2023-12-19 01:31:32,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-19 01:31:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1351 transitions. [2023-12-19 01:31:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-19 01:31:32,294 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:32,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:32,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-19 01:31:32,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 01:31:32,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:32,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash 991572841, now seen corresponding path program 1 times [2023-12-19 01:31:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:32,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076924511] [2023-12-19 01:31:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 01:31:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-19 01:31:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-12-19 01:31:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-19 01:31:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-12-19 01:31:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-19 01:31:32,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076924511] [2023-12-19 01:31:32,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076924511] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 01:31:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708594348] [2023-12-19 01:31:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:32,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 01:31:32,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 01:31:32,576 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) [2023-12-19 01:31:32,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 01:31:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:32,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 01:31:32,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 01:31:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-19 01:31:32,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 01:31:32,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708594348] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:32,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 01:31:32,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-19 01:31:32,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535721002] [2023-12-19 01:31:32,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:32,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 01:31:32,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:32,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 01:31:32,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 01:31:32,700 INFO L87 Difference]: Start difference. First operand 966 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-19 01:31:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:32,780 INFO L93 Difference]: Finished difference Result 1241 states and 1702 transitions. [2023-12-19 01:31:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 01:31:32,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 92 [2023-12-19 01:31:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:32,782 INFO L225 Difference]: With dead ends: 1241 [2023-12-19 01:31:32,782 INFO L226 Difference]: Without dead ends: 262 [2023-12-19 01:31:32,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 01:31:32,784 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 55 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:32,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 944 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 01:31:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-12-19 01:31:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2023-12-19 01:31:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 231 states have (on average 1.6233766233766234) internal successors, (375), 233 states have internal predecessors, (375), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-19 01:31:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 421 transitions. [2023-12-19 01:31:32,796 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 421 transitions. Word has length 92 [2023-12-19 01:31:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:32,796 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 421 transitions. [2023-12-19 01:31:32,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-19 01:31:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 421 transitions. [2023-12-19 01:31:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:32,797 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:32,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:32,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 01:31:33,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 01:31:33,017 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:33,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:33,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1971697741, now seen corresponding path program 1 times [2023-12-19 01:31:33,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:33,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633259667] [2023-12-19 01:31:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:33,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:33,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:33,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:33,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:33,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:33,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:33,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:33,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633259667] [2023-12-19 01:31:33,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633259667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:33,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:33,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 01:31:33,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009246625] [2023-12-19 01:31:33,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:33,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 01:31:33,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 01:31:33,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 01:31:33,130 INFO L87 Difference]: Start difference. First operand 262 states and 421 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:34,091 INFO L93 Difference]: Finished difference Result 607 states and 992 transitions. [2023-12-19 01:31:34,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 01:31:34,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:34,093 INFO L225 Difference]: With dead ends: 607 [2023-12-19 01:31:34,093 INFO L226 Difference]: Without dead ends: 352 [2023-12-19 01:31:34,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 01:31:34,094 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 705 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:34,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 487 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 01:31:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-12-19 01:31:34,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 262. [2023-12-19 01:31:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 231 states have (on average 1.619047619047619) internal successors, (374), 233 states have internal predecessors, (374), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-19 01:31:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 420 transitions. [2023-12-19 01:31:34,107 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 420 transitions. Word has length 122 [2023-12-19 01:31:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:34,107 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 420 transitions. [2023-12-19 01:31:34,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 420 transitions. [2023-12-19 01:31:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:34,108 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:34,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:34,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-19 01:31:34,108 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:34,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash 321383285, now seen corresponding path program 1 times [2023-12-19 01:31:34,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:34,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345528741] [2023-12-19 01:31:34,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:34,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:34,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:34,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:34,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:34,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:34,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345528741] [2023-12-19 01:31:34,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345528741] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:34,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:34,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 01:31:34,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457219019] [2023-12-19 01:31:34,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:34,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 01:31:34,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 01:31:34,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 01:31:34,270 INFO L87 Difference]: Start difference. First operand 262 states and 420 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:35,842 INFO L93 Difference]: Finished difference Result 947 states and 1554 transitions. [2023-12-19 01:31:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 01:31:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:35,845 INFO L225 Difference]: With dead ends: 947 [2023-12-19 01:31:35,845 INFO L226 Difference]: Without dead ends: 700 [2023-12-19 01:31:35,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-12-19 01:31:35,846 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 1057 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:35,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1072 Valid, 820 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 01:31:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2023-12-19 01:31:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 519. [2023-12-19 01:31:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 464 states have (on average 1.6293103448275863) internal successors, (756), 467 states have internal predecessors, (756), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2023-12-19 01:31:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 839 transitions. [2023-12-19 01:31:35,868 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 839 transitions. Word has length 122 [2023-12-19 01:31:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:35,868 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 839 transitions. [2023-12-19 01:31:35,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 839 transitions. [2023-12-19 01:31:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:35,871 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:35,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:35,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-19 01:31:35,872 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:35,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:35,872 INFO L85 PathProgramCache]: Analyzing trace with hash 45457973, now seen corresponding path program 1 times [2023-12-19 01:31:35,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:35,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662766833] [2023-12-19 01:31:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:35,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:35,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:35,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:36,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:36,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:36,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:36,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:36,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662766833] [2023-12-19 01:31:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662766833] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:36,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:36,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:31:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717701495] [2023-12-19 01:31:36,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:36,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:31:36,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:36,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:31:36,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:31:36,031 INFO L87 Difference]: Start difference. First operand 519 states and 839 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:38,299 INFO L93 Difference]: Finished difference Result 1562 states and 2564 transitions. [2023-12-19 01:31:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 01:31:38,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:38,303 INFO L225 Difference]: With dead ends: 1562 [2023-12-19 01:31:38,304 INFO L226 Difference]: Without dead ends: 1058 [2023-12-19 01:31:38,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-19 01:31:38,305 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1076 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:38,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 1561 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2653 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-19 01:31:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2023-12-19 01:31:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 757. [2023-12-19 01:31:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 678 states have (on average 1.6224188790560472) internal successors, (1100), 682 states have internal predecessors, (1100), 58 states have call successors, (58), 19 states have call predecessors, (58), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2023-12-19 01:31:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1219 transitions. [2023-12-19 01:31:38,335 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1219 transitions. Word has length 122 [2023-12-19 01:31:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:38,335 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1219 transitions. [2023-12-19 01:31:38,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1219 transitions. [2023-12-19 01:31:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:38,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:38,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:38,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-19 01:31:38,336 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:38,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:38,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1434751987, now seen corresponding path program 1 times [2023-12-19 01:31:38,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:38,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468777846] [2023-12-19 01:31:38,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:38,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:38,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:38,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:38,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:38,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:38,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:38,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:38,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468777846] [2023-12-19 01:31:38,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468777846] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:38,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:38,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:31:38,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140241540] [2023-12-19 01:31:38,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:38,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:31:38,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:38,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:31:38,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:31:38,510 INFO L87 Difference]: Start difference. First operand 757 states and 1219 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:40,479 INFO L93 Difference]: Finished difference Result 2463 states and 4036 transitions. [2023-12-19 01:31:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 01:31:40,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:40,492 INFO L225 Difference]: With dead ends: 2463 [2023-12-19 01:31:40,492 INFO L226 Difference]: Without dead ends: 1721 [2023-12-19 01:31:40,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-19 01:31:40,495 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 1156 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:40,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1171 Valid, 1014 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2196 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-19 01:31:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-12-19 01:31:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1234. [2023-12-19 01:31:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1107 states have (on average 1.6160794941282746) internal successors, (1789), 1113 states have internal predecessors, (1789), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2023-12-19 01:31:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1984 transitions. [2023-12-19 01:31:40,587 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1984 transitions. Word has length 122 [2023-12-19 01:31:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:40,587 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1984 transitions. [2023-12-19 01:31:40,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1984 transitions. [2023-12-19 01:31:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:40,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:40,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:40,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-19 01:31:40,590 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:40,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:40,590 INFO L85 PathProgramCache]: Analyzing trace with hash -598642059, now seen corresponding path program 1 times [2023-12-19 01:31:40,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:40,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754917322] [2023-12-19 01:31:40,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:40,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:40,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:40,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:40,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:40,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:40,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:40,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:40,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754917322] [2023-12-19 01:31:40,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754917322] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:40,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:40,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:31:40,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019780686] [2023-12-19 01:31:40,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:40,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:31:40,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:40,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:31:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:31:40,724 INFO L87 Difference]: Start difference. First operand 1234 states and 1984 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:41,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:41,807 INFO L93 Difference]: Finished difference Result 2928 states and 4792 transitions. [2023-12-19 01:31:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 01:31:41,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:41,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:41,813 INFO L225 Difference]: With dead ends: 2928 [2023-12-19 01:31:41,813 INFO L226 Difference]: Without dead ends: 1709 [2023-12-19 01:31:41,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-19 01:31:41,816 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 780 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:41,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 791 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-19 01:31:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2023-12-19 01:31:41,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1234. [2023-12-19 01:31:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1107 states have (on average 1.6115627822944896) internal successors, (1784), 1113 states have internal predecessors, (1784), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2023-12-19 01:31:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1979 transitions. [2023-12-19 01:31:41,868 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1979 transitions. Word has length 122 [2023-12-19 01:31:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:41,868 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1979 transitions. [2023-12-19 01:31:41,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1979 transitions. [2023-12-19 01:31:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:41,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:41,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:41,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-19 01:31:41,870 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:41,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:41,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1829616563, now seen corresponding path program 1 times [2023-12-19 01:31:41,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:41,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891255487] [2023-12-19 01:31:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:41,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:41,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:41,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:41,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:42,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:42,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:42,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891255487] [2023-12-19 01:31:42,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891255487] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:42,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:42,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:31:42,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415519502] [2023-12-19 01:31:42,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:42,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:31:42,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:42,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:31:42,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:31:42,014 INFO L87 Difference]: Start difference. First operand 1234 states and 1979 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:43,004 INFO L93 Difference]: Finished difference Result 2922 states and 4766 transitions. [2023-12-19 01:31:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 01:31:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:43,010 INFO L225 Difference]: With dead ends: 2922 [2023-12-19 01:31:43,010 INFO L226 Difference]: Without dead ends: 1703 [2023-12-19 01:31:43,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-19 01:31:43,013 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 887 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:43,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 663 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 01:31:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2023-12-19 01:31:43,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1234. [2023-12-19 01:31:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1107 states have (on average 1.6070460704607046) internal successors, (1779), 1113 states have internal predecessors, (1779), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2023-12-19 01:31:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1974 transitions. [2023-12-19 01:31:43,084 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1974 transitions. Word has length 122 [2023-12-19 01:31:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:43,084 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1974 transitions. [2023-12-19 01:31:43,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1974 transitions. [2023-12-19 01:31:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:43,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:43,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:43,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-19 01:31:43,086 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:43,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:43,086 INFO L85 PathProgramCache]: Analyzing trace with hash 522474165, now seen corresponding path program 1 times [2023-12-19 01:31:43,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:43,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081681796] [2023-12-19 01:31:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:43,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:43,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:43,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:43,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:43,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:43,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:43,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:43,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081681796] [2023-12-19 01:31:43,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081681796] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:43,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:43,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:31:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719864146] [2023-12-19 01:31:43,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:43,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:31:43,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:43,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:31:43,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:31:43,208 INFO L87 Difference]: Start difference. First operand 1234 states and 1974 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:44,329 INFO L93 Difference]: Finished difference Result 2915 states and 4738 transitions. [2023-12-19 01:31:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 01:31:44,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:44,335 INFO L225 Difference]: With dead ends: 2915 [2023-12-19 01:31:44,335 INFO L226 Difference]: Without dead ends: 1696 [2023-12-19 01:31:44,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-19 01:31:44,337 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 776 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:44,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 791 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-19 01:31:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2023-12-19 01:31:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1234. [2023-12-19 01:31:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1107 states have (on average 1.6025293586269196) internal successors, (1774), 1113 states have internal predecessors, (1774), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2023-12-19 01:31:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1969 transitions. [2023-12-19 01:31:44,391 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1969 transitions. Word has length 122 [2023-12-19 01:31:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:44,392 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1969 transitions. [2023-12-19 01:31:44,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1969 transitions. [2023-12-19 01:31:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:44,393 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:44,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:44,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-19 01:31:44,393 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:44,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1874996365, now seen corresponding path program 1 times [2023-12-19 01:31:44,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:44,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94317701] [2023-12-19 01:31:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:44,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:44,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:44,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:44,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:44,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:44,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:44,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:44,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94317701] [2023-12-19 01:31:44,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94317701] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:44,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:44,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:31:44,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817757022] [2023-12-19 01:31:44,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:44,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:31:44,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:44,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:31:44,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:31:44,533 INFO L87 Difference]: Start difference. First operand 1234 states and 1969 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:46,686 INFO L93 Difference]: Finished difference Result 4169 states and 6737 transitions. [2023-12-19 01:31:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 01:31:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:46,696 INFO L225 Difference]: With dead ends: 4169 [2023-12-19 01:31:46,696 INFO L226 Difference]: Without dead ends: 2950 [2023-12-19 01:31:46,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-19 01:31:46,700 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1050 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 2570 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:46,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 1559 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2570 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-19 01:31:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2023-12-19 01:31:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2201. [2023-12-19 01:31:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 1978 states have (on average 1.5950455005055613) internal successors, (3155), 1988 states have internal predecessors, (3155), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2023-12-19 01:31:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3508 transitions. [2023-12-19 01:31:46,798 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3508 transitions. Word has length 122 [2023-12-19 01:31:46,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:46,798 INFO L495 AbstractCegarLoop]: Abstraction has 2201 states and 3508 transitions. [2023-12-19 01:31:46,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3508 transitions. [2023-12-19 01:31:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:46,799 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:46,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:46,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-19 01:31:46,800 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:46,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:46,800 INFO L85 PathProgramCache]: Analyzing trace with hash -843955467, now seen corresponding path program 1 times [2023-12-19 01:31:46,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:46,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357983310] [2023-12-19 01:31:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:46,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:46,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:46,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:46,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:46,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:46,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:46,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357983310] [2023-12-19 01:31:46,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357983310] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:46,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:46,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:31:46,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163295043] [2023-12-19 01:31:46,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:46,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:31:46,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:31:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:31:46,935 INFO L87 Difference]: Start difference. First operand 2201 states and 3508 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:49,143 INFO L93 Difference]: Finished difference Result 7614 states and 12294 transitions. [2023-12-19 01:31:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 01:31:49,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:49,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:49,162 INFO L225 Difference]: With dead ends: 7614 [2023-12-19 01:31:49,162 INFO L226 Difference]: Without dead ends: 5428 [2023-12-19 01:31:49,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-19 01:31:49,168 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1046 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:49,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 1559 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-19 01:31:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5428 states. [2023-12-19 01:31:49,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5428 to 4144. [2023-12-19 01:31:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 3729 states have (on average 1.590506838294449) internal successors, (5931), 3747 states have internal predecessors, (5931), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2023-12-19 01:31:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 6618 transitions. [2023-12-19 01:31:49,374 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 6618 transitions. Word has length 122 [2023-12-19 01:31:49,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:49,374 INFO L495 AbstractCegarLoop]: Abstraction has 4144 states and 6618 transitions. [2023-12-19 01:31:49,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 6618 transitions. [2023-12-19 01:31:49,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:49,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:49,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:49,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-19 01:31:49,377 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:49,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash 757115639, now seen corresponding path program 1 times [2023-12-19 01:31:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:49,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517906975] [2023-12-19 01:31:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:49,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:49,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:49,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:49,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:49,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:49,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:49,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:49,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517906975] [2023-12-19 01:31:49,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517906975] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:49,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:49,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:31:49,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133445245] [2023-12-19 01:31:49,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:31:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:31:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:31:49,509 INFO L87 Difference]: Start difference. First operand 4144 states and 6618 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:51,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:51,964 INFO L93 Difference]: Finished difference Result 16181 states and 26164 transitions. [2023-12-19 01:31:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 01:31:51,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:52,015 INFO L225 Difference]: With dead ends: 16181 [2023-12-19 01:31:52,015 INFO L226 Difference]: Without dead ends: 12052 [2023-12-19 01:31:52,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-19 01:31:52,028 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 1339 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:52,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 1552 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-19 01:31:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12052 states. [2023-12-19 01:31:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12052 to 8011. [2023-12-19 01:31:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8011 states, 7228 states have (on average 1.5889596015495295) internal successors, (11485), 7262 states have internal predecessors, (11485), 552 states have call successors, (552), 199 states have call predecessors, (552), 230 states have return successors, (825), 581 states have call predecessors, (825), 550 states have call successors, (825) [2023-12-19 01:31:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8011 states to 8011 states and 12862 transitions. [2023-12-19 01:31:52,504 INFO L78 Accepts]: Start accepts. Automaton has 8011 states and 12862 transitions. Word has length 122 [2023-12-19 01:31:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:52,504 INFO L495 AbstractCegarLoop]: Abstraction has 8011 states and 12862 transitions. [2023-12-19 01:31:52,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 8011 states and 12862 transitions. [2023-12-19 01:31:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:52,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:52,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:52,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-19 01:31:52,511 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:52,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:52,511 INFO L85 PathProgramCache]: Analyzing trace with hash -299615563, now seen corresponding path program 1 times [2023-12-19 01:31:52,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:52,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657377255] [2023-12-19 01:31:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:52,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:52,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:52,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:52,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:52,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:52,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:52,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657377255] [2023-12-19 01:31:52,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657377255] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:52,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:52,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-19 01:31:52,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182288586] [2023-12-19 01:31:52,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:52,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 01:31:52,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:52,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 01:31:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-19 01:31:52,688 INFO L87 Difference]: Start difference. First operand 8011 states and 12862 transitions. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:56,840 INFO L93 Difference]: Finished difference Result 34694 states and 56592 transitions. [2023-12-19 01:31:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-19 01:31:56,841 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:56,939 INFO L225 Difference]: With dead ends: 34694 [2023-12-19 01:31:56,939 INFO L226 Difference]: Without dead ends: 26698 [2023-12-19 01:31:56,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2023-12-19 01:31:56,969 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1469 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:56,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 1492 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-19 01:31:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26698 states. [2023-12-19 01:31:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26698 to 15554. [2023-12-19 01:31:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15554 states, 14051 states have (on average 1.578321827627927) internal successors, (22177), 14117 states have internal predecessors, (22177), 1048 states have call successors, (1048), 391 states have call predecessors, (1048), 454 states have return successors, (1839), 1109 states have call predecessors, (1839), 1046 states have call successors, (1839) [2023-12-19 01:31:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15554 states to 15554 states and 25064 transitions. [2023-12-19 01:31:57,888 INFO L78 Accepts]: Start accepts. Automaton has 15554 states and 25064 transitions. Word has length 122 [2023-12-19 01:31:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:31:57,888 INFO L495 AbstractCegarLoop]: Abstraction has 15554 states and 25064 transitions. [2023-12-19 01:31:57,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 7 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 15554 states and 25064 transitions. [2023-12-19 01:31:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:31:57,896 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:31:57,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:31:57,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-19 01:31:57,897 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:31:57,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:31:57,897 INFO L85 PathProgramCache]: Analyzing trace with hash -634410183, now seen corresponding path program 1 times [2023-12-19 01:31:57,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:31:57,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011856738] [2023-12-19 01:31:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:31:57,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:31:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:57,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:31:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:57,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:31:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:31:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:58,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:31:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:58,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:31:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:31:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:31:58,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:31:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011856738] [2023-12-19 01:31:58,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011856738] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:31:58,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:31:58,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:31:58,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703081828] [2023-12-19 01:31:58,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:31:58,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:31:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:31:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:31:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:31:58,015 INFO L87 Difference]: Start difference. First operand 15554 states and 25064 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:31:59,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:31:59,747 INFO L93 Difference]: Finished difference Result 35836 states and 58682 transitions. [2023-12-19 01:31:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 01:31:59,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:31:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:31:59,816 INFO L225 Difference]: With dead ends: 35836 [2023-12-19 01:31:59,816 INFO L226 Difference]: Without dead ends: 20297 [2023-12-19 01:31:59,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-19 01:31:59,855 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 889 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 01:31:59,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 662 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 01:31:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20297 states. [2023-12-19 01:32:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20297 to 15554. [2023-12-19 01:32:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15554 states, 14051 states have (on average 1.5736958223613977) internal successors, (22112), 14117 states have internal predecessors, (22112), 1048 states have call successors, (1048), 391 states have call predecessors, (1048), 454 states have return successors, (1839), 1109 states have call predecessors, (1839), 1046 states have call successors, (1839) [2023-12-19 01:32:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15554 states to 15554 states and 24999 transitions. [2023-12-19 01:32:00,867 INFO L78 Accepts]: Start accepts. Automaton has 15554 states and 24999 transitions. Word has length 122 [2023-12-19 01:32:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:32:00,867 INFO L495 AbstractCegarLoop]: Abstraction has 15554 states and 24999 transitions. [2023-12-19 01:32:00,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 15554 states and 24999 transitions. [2023-12-19 01:32:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:32:00,877 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:32:00,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:32:00,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-19 01:32:00,877 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:32:00,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:32:00,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2041582199, now seen corresponding path program 1 times [2023-12-19 01:32:00,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:32:00,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679886979] [2023-12-19 01:32:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:32:00,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:32:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:00,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:32:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:00,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:32:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:01,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:32:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:01,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:32:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:01,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:32:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:32:01,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:32:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679886979] [2023-12-19 01:32:01,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679886979] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:32:01,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:32:01,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:32:01,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032741499] [2023-12-19 01:32:01,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:32:01,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:32:01,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:32:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:32:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:32:01,023 INFO L87 Difference]: Start difference. First operand 15554 states and 24999 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:32:04,440 INFO L93 Difference]: Finished difference Result 59393 states and 96510 transitions. [2023-12-19 01:32:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 01:32:04,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:32:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:32:04,702 INFO L225 Difference]: With dead ends: 59393 [2023-12-19 01:32:04,702 INFO L226 Difference]: Without dead ends: 43854 [2023-12-19 01:32:04,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-19 01:32:04,738 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 1083 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-19 01:32:04,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1097 Valid, 1552 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-19 01:32:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43854 states. [2023-12-19 01:32:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43854 to 30892. [2023-12-19 01:32:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30892 states, 27981 states have (on average 1.5726385761766912) internal successors, (44004), 28111 states have internal predecessors, (44004), 2008 states have call successors, (2008), 775 states have call predecessors, (2008), 902 states have return successors, (4321), 2133 states have call predecessors, (4321), 2006 states have call successors, (4321) [2023-12-19 01:32:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30892 states to 30892 states and 50333 transitions. [2023-12-19 01:32:06,600 INFO L78 Accepts]: Start accepts. Automaton has 30892 states and 50333 transitions. Word has length 122 [2023-12-19 01:32:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:32:06,601 INFO L495 AbstractCegarLoop]: Abstraction has 30892 states and 50333 transitions. [2023-12-19 01:32:06,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 30892 states and 50333 transitions. [2023-12-19 01:32:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:32:06,618 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:32:06,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:32:06,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-19 01:32:06,619 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:32:06,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:32:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1158073209, now seen corresponding path program 1 times [2023-12-19 01:32:06,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:32:06,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003395080] [2023-12-19 01:32:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:32:06,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:32:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:06,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:32:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:06,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:32:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:06,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:32:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:06,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:32:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:06,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:32:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:32:06,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:32:06,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003395080] [2023-12-19 01:32:06,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003395080] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:32:06,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:32:06,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:32:06,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484978986] [2023-12-19 01:32:06,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:32:06,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:32:06,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:32:06,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:32:06,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:32:06,755 INFO L87 Difference]: Start difference. First operand 30892 states and 50333 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:32:11,507 INFO L93 Difference]: Finished difference Result 116729 states and 192262 transitions. [2023-12-19 01:32:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 01:32:11,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:32:11,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:32:11,786 INFO L225 Difference]: With dead ends: 116729 [2023-12-19 01:32:11,786 INFO L226 Difference]: Without dead ends: 85852 [2023-12-19 01:32:11,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-19 01:32:11,848 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 1189 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-19 01:32:11,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1213 Valid, 1552 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-19 01:32:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85852 states. [2023-12-19 01:32:14,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85852 to 61565. [2023-12-19 01:32:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61565 states, 55902 states have (on average 1.5725734320775644) internal successors, (87910), 56160 states have internal predecessors, (87910), 3864 states have call successors, (3864), 1543 states have call predecessors, (3864), 1798 states have return successors, (10679), 4117 states have call predecessors, (10679), 3862 states have call successors, (10679) [2023-12-19 01:32:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61565 states to 61565 states and 102453 transitions. [2023-12-19 01:32:15,180 INFO L78 Accepts]: Start accepts. Automaton has 61565 states and 102453 transitions. Word has length 122 [2023-12-19 01:32:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:32:15,181 INFO L495 AbstractCegarLoop]: Abstraction has 61565 states and 102453 transitions. [2023-12-19 01:32:15,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 61565 states and 102453 transitions. [2023-12-19 01:32:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:32:15,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:32:15,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:32:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-19 01:32:15,221 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:32:15,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:32:15,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1129572919, now seen corresponding path program 1 times [2023-12-19 01:32:15,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:32:15,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911181636] [2023-12-19 01:32:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:32:15,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:32:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:15,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:32:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:15,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:32:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:15,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:32:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:15,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:32:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:15,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:32:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:32:15,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:32:15,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911181636] [2023-12-19 01:32:15,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911181636] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:32:15,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:32:15,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:32:15,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496600156] [2023-12-19 01:32:15,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:32:15,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:32:15,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:32:15,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:32:15,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:32:15,359 INFO L87 Difference]: Start difference. First operand 61565 states and 102453 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:19,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:32:19,219 INFO L93 Difference]: Finished difference Result 140204 states and 238863 transitions. [2023-12-19 01:32:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 01:32:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:32:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:32:19,511 INFO L225 Difference]: With dead ends: 140204 [2023-12-19 01:32:19,512 INFO L226 Difference]: Without dead ends: 78654 [2023-12-19 01:32:19,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-19 01:32:19,627 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 895 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 01:32:19,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 662 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 01:32:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78654 states. [2023-12-19 01:32:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78654 to 61565. [2023-12-19 01:32:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61565 states, 55902 states have (on average 1.5679761010339524) internal successors, (87653), 56160 states have internal predecessors, (87653), 3864 states have call successors, (3864), 1543 states have call predecessors, (3864), 1798 states have return successors, (10679), 4117 states have call predecessors, (10679), 3862 states have call successors, (10679) [2023-12-19 01:32:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61565 states to 61565 states and 102196 transitions. [2023-12-19 01:32:23,391 INFO L78 Accepts]: Start accepts. Automaton has 61565 states and 102196 transitions. Word has length 122 [2023-12-19 01:32:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:32:23,391 INFO L495 AbstractCegarLoop]: Abstraction has 61565 states and 102196 transitions. [2023-12-19 01:32:23,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 61565 states and 102196 transitions. [2023-12-19 01:32:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:32:23,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:32:23,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:32:23,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-19 01:32:23,429 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:32:23,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:32:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash -811009095, now seen corresponding path program 1 times [2023-12-19 01:32:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:32:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130904371] [2023-12-19 01:32:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:32:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:32:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:23,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:32:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:23,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:32:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:23,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:32:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:23,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:32:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:23,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:32:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:32:23,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:32:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130904371] [2023-12-19 01:32:23,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130904371] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:32:23,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:32:23,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:32:23,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966915826] [2023-12-19 01:32:23,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:32:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:32:23,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:32:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:32:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:32:23,567 INFO L87 Difference]: Start difference. First operand 61565 states and 102196 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:32:30,735 INFO L93 Difference]: Finished difference Result 222308 states and 373968 transitions. [2023-12-19 01:32:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 01:32:30,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:32:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:32:31,288 INFO L225 Difference]: With dead ends: 222308 [2023-12-19 01:32:31,288 INFO L226 Difference]: Without dead ends: 160758 [2023-12-19 01:32:31,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-19 01:32:31,434 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 1078 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-19 01:32:31,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 1552 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-19 01:32:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160758 states. [2023-12-19 01:32:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160758 to 123424. [2023-12-19 01:32:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123424 states, 112385 states have (on average 1.5681363171241713) internal successors, (176235), 112899 states have internal predecessors, (176235), 7448 states have call successors, (7448), 3079 states have call predecessors, (7448), 3590 states have return successors, (27641), 7957 states have call predecessors, (27641), 7446 states have call successors, (27641) [2023-12-19 01:32:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123424 states to 123424 states and 211324 transitions. [2023-12-19 01:32:38,886 INFO L78 Accepts]: Start accepts. Automaton has 123424 states and 211324 transitions. Word has length 122 [2023-12-19 01:32:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:32:38,886 INFO L495 AbstractCegarLoop]: Abstraction has 123424 states and 211324 transitions. [2023-12-19 01:32:38,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 123424 states and 211324 transitions. [2023-12-19 01:32:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:32:38,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:32:38,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:32:38,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-19 01:32:38,981 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:32:38,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:32:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1581742661, now seen corresponding path program 1 times [2023-12-19 01:32:38,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:32:38,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362259431] [2023-12-19 01:32:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:32:38,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:32:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:39,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:32:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:39,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:32:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:39,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:32:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:39,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:32:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:39,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:32:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:32:39,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:32:39,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362259431] [2023-12-19 01:32:39,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362259431] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:32:39,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:32:39,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:32:39,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117299184] [2023-12-19 01:32:39,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:32:39,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:32:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:32:39,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:32:39,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:32:39,104 INFO L87 Difference]: Start difference. First operand 123424 states and 211324 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:32:46,403 INFO L93 Difference]: Finished difference Result 278252 states and 491218 transitions. [2023-12-19 01:32:46,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 01:32:46,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:32:46,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:32:47,132 INFO L225 Difference]: With dead ends: 278252 [2023-12-19 01:32:47,132 INFO L226 Difference]: Without dead ends: 154843 [2023-12-19 01:32:47,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-19 01:32:47,344 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 780 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 01:32:47,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 790 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 01:32:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154843 states. [2023-12-19 01:32:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154843 to 123424. [2023-12-19 01:32:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123424 states, 112385 states have (on average 1.5635716510210438) internal successors, (175722), 112899 states have internal predecessors, (175722), 7448 states have call successors, (7448), 3079 states have call predecessors, (7448), 3590 states have return successors, (27641), 7957 states have call predecessors, (27641), 7446 states have call successors, (27641) [2023-12-19 01:32:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123424 states to 123424 states and 210811 transitions. [2023-12-19 01:32:55,072 INFO L78 Accepts]: Start accepts. Automaton has 123424 states and 210811 transitions. Word has length 122 [2023-12-19 01:32:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:32:55,073 INFO L495 AbstractCegarLoop]: Abstraction has 123424 states and 210811 transitions. [2023-12-19 01:32:55,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:32:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 123424 states and 210811 transitions. [2023-12-19 01:32:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 01:32:55,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:32:55,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 01:32:55,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-19 01:32:55,141 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:32:55,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:32:55,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1718530937, now seen corresponding path program 1 times [2023-12-19 01:32:55,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:32:55,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120660257] [2023-12-19 01:32:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:32:55,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:32:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:55,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:32:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:55,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:32:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:55,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:32:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:55,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:32:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:55,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:32:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:32:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 01:32:55,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:32:55,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120660257] [2023-12-19 01:32:55,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120660257] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:32:55,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 01:32:55,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 01:32:55,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185045257] [2023-12-19 01:32:55,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:32:55,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 01:32:55,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:32:55,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 01:32:55,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:32:55,251 INFO L87 Difference]: Start difference. First operand 123424 states and 210811 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:33:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 01:33:05,817 INFO L93 Difference]: Finished difference Result 357900 states and 605727 transitions. [2023-12-19 01:33:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 01:33:05,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 122 [2023-12-19 01:33:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 01:33:06,861 INFO L225 Difference]: With dead ends: 357900 [2023-12-19 01:33:06,861 INFO L226 Difference]: Without dead ends: 234492 [2023-12-19 01:33:07,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-12-19 01:33:07,268 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 1028 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-19 01:33:07,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 1042 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-19 01:33:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234492 states. [2023-12-19 01:33:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234492 to 185477. [2023-12-19 01:33:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185477 states, 168782 states have (on average 1.5517176002180326) internal successors, (261902), 169809 states have internal predecessors, (261902), 11306 states have call successors, (11306), 4621 states have call predecessors, (11306), 5388 states have return successors, (38061), 11558 states have call predecessors, (38061), 11304 states have call successors, (38061) [2023-12-19 01:33:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185477 states to 185477 states and 311269 transitions. [2023-12-19 01:33:17,608 INFO L78 Accepts]: Start accepts. Automaton has 185477 states and 311269 transitions. Word has length 122 [2023-12-19 01:33:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 01:33:17,608 INFO L495 AbstractCegarLoop]: Abstraction has 185477 states and 311269 transitions. [2023-12-19 01:33:17,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 01:33:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 185477 states and 311269 transitions. [2023-12-19 01:33:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-12-19 01:33:18,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 01:33:18,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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] [2023-12-19 01:33:18,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-19 01:33:18,211 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 01:33:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 01:33:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1944940398, now seen corresponding path program 1 times [2023-12-19 01:33:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 01:33:18,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131768930] [2023-12-19 01:33:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:33:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 01:33:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:33:18,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 01:33:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:33:18,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-19 01:33:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:33:18,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 01:33:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:33:18,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-12-19 01:33:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:33:18,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-12-19 01:33:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:33:18,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-12-19 01:33:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:33:18,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-19 01:33:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:33:18,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2023-12-19 01:33:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:33:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-19 01:33:18,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 01:33:18,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131768930] [2023-12-19 01:33:18,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131768930] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 01:33:18,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280228075] [2023-12-19 01:33:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 01:33:18,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 01:33:18,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 01:33:18,363 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) [2023-12-19 01:33:18,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 01:33:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 01:33:18,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-19 01:33:18,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 01:33:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-19 01:33:18,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 01:33:18,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280228075] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 01:33:18,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 01:33:18,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-19 01:33:18,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475825723] [2023-12-19 01:33:18,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 01:33:18,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 01:33:18,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 01:33:18,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 01:33:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 01:33:18,594 INFO L87 Difference]: Start difference. First operand 185477 states and 311269 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)