/usr/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:17:02,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:17:02,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:17:02,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:17:02,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:17:02,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:17:02,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:17:02,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:17:02,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:17:02,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:17:02,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:17:02,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:17:02,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:17:02,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:17:02,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:17:02,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:17:02,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 00:17:02,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:17:02,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:17:02,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:17:02,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 00:17:02,627 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:17:02,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:17:02,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:17:02,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:17:02,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:17:02,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:17:02,628 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:17:02,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:17:02,628 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:17:02,634 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:17:02,635 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:17:02,635 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:17:02,635 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:17:02,635 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:17:02,635 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:17:02,635 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:17:02,635 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:17:02,635 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:17:02,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:17:02,636 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:17:02,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:17:02,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:17:02,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:17:02,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:17:02,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:17:02,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:17:02,637 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:17:02,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:17:02,637 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:17:02,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:17:02,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:17:02,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:17:02,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:17:02,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:17:02,637 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:17:02,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:17:02,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:17:02,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:17:02,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:17:02,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:17:02,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:17:02,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:17:02,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:17:02,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:17:02,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:17:02,827 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:17:02,827 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:17:02,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-04-01 00:17:03,912 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:17:04,139 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:17:04,140 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-04-01 00:17:04,152 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5374419c6/ebb288a5e1f04db590630be58fd08b3b/FLAG1a4b32196 [2023-04-01 00:17:04,165 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5374419c6/ebb288a5e1f04db590630be58fd08b3b [2023-04-01 00:17:04,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:17:04,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:17:04,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:17:04,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:17:04,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:17:04,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7366034b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04, skipping insertion in model container [2023-04-01 00:17:04,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:17:04,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:17:04,408 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c[31172,31185] [2023-04-01 00:17:04,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:17:04,420 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:17:04,489 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c[31172,31185] [2023-04-01 00:17:04,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:17:04,502 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:17:04,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04 WrapperNode [2023-04-01 00:17:04,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:17:04,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:17:04,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:17:04,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:17:04,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,566 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:17:04,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:17:04,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:17:04,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:17:04,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04" (1/1) ... [2023-04-01 00:17:04,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:17:04,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:17:04,629 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 00:17:04,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 00:17:04,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:17:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 00:17:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:17:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:17:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:17:04,779 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:17:04,780 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:17:05,525 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:17:06,188 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:17:06,189 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 00:17:06,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:17:06 BoogieIcfgContainer [2023-04-01 00:17:06,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:17:06,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:17:06,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:17:06,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:17:06,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:17:04" (1/3) ... [2023-04-01 00:17:06,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666d2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:17:06, skipping insertion in model container [2023-04-01 00:17:06,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:04" (2/3) ... [2023-04-01 00:17:06,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666d2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:17:06, skipping insertion in model container [2023-04-01 00:17:06,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:17:06" (3/3) ... [2023-04-01 00:17:06,206 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-04-01 00:17:06,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:17:06,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:17:06,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:17:06,271 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b5a22a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:17:06,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:17:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 00:17:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 00:17:06,291 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:06,292 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] [2023-04-01 00:17:06,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:06,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:06,299 INFO L85 PathProgramCache]: Analyzing trace with hash -388303279, now seen corresponding path program 1 times [2023-04-01 00:17:06,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:06,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697898177] [2023-04-01 00:17:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:06,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:17:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:17:12,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:17:12,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697898177] [2023-04-01 00:17:12,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697898177] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:17:12,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:17:12,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 00:17:12,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871109807] [2023-04-01 00:17:12,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:17:12,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 00:17:12,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:17:12,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 00:17:12,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:17:12,465 INFO L87 Difference]: Start difference. First operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 00:17:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:17:14,631 INFO L93 Difference]: Finished difference Result 266 states and 386 transitions. [2023-04-01 00:17:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 00:17:14,634 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-04-01 00:17:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:17:14,651 INFO L225 Difference]: With dead ends: 266 [2023-04-01 00:17:14,652 INFO L226 Difference]: Without dead ends: 225 [2023-04-01 00:17:14,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 00:17:14,661 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1380 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:17:14,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 138 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 00:17:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-04-01 00:17:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2023-04-01 00:17:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5497076023391814) internal successors, (265), 172 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-01 00:17:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2023-04-01 00:17:14,730 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 85 [2023-04-01 00:17:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:17:14,731 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2023-04-01 00:17:14,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 00:17:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2023-04-01 00:17:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 00:17:14,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:14,738 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] [2023-04-01 00:17:14,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:17:14,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:14,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash 661752629, now seen corresponding path program 1 times [2023-04-01 00:17:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:14,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113196286] [2023-04-01 00:17:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:17:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:17:17,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:17:17,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113196286] [2023-04-01 00:17:17,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113196286] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:17:17,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:17:17,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:17:17,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334203259] [2023-04-01 00:17:17,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:17:17,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:17:17,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:17:17,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:17:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:17:17,059 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 00:17:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:17:17,973 INFO L93 Difference]: Finished difference Result 277 states and 392 transitions. [2023-04-01 00:17:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:17:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2023-04-01 00:17:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:17:17,991 INFO L225 Difference]: With dead ends: 277 [2023-04-01 00:17:17,991 INFO L226 Difference]: Without dead ends: 232 [2023-04-01 00:17:17,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:17:17,993 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 567 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 00:17:17,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 87 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 00:17:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-01 00:17:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2023-04-01 00:17:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.543859649122807) internal successors, (264), 172 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 00:17:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 293 transitions. [2023-04-01 00:17:18,015 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 293 transitions. Word has length 86 [2023-04-01 00:17:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:17:18,015 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 293 transitions. [2023-04-01 00:17:18,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 00:17:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 293 transitions. [2023-04-01 00:17:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 00:17:18,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:18,017 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] [2023-04-01 00:17:18,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:17:18,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:18,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:18,017 INFO L85 PathProgramCache]: Analyzing trace with hash -39541190, now seen corresponding path program 1 times [2023-04-01 00:17:18,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:18,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358928838] [2023-04-01 00:17:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:18,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:17:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:17:20,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:17:20,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358928838] [2023-04-01 00:17:20,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358928838] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:17:20,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:17:20,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:17:20,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919533259] [2023-04-01 00:17:20,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:17:20,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:17:20,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:17:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:17:20,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:17:20,125 INFO L87 Difference]: Start difference. First operand 201 states and 293 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 00:17:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:17:21,221 INFO L93 Difference]: Finished difference Result 271 states and 376 transitions. [2023-04-01 00:17:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:17:21,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-04-01 00:17:21,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:17:21,223 INFO L225 Difference]: With dead ends: 271 [2023-04-01 00:17:21,223 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 00:17:21,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:17:21,224 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 570 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:17:21,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 96 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 00:17:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 00:17:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2023-04-01 00:17:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 172 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 00:17:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2023-04-01 00:17:21,250 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 87 [2023-04-01 00:17:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:17:21,252 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2023-04-01 00:17:21,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 00:17:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2023-04-01 00:17:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 00:17:21,254 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:21,254 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] [2023-04-01 00:17:21,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:17:21,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:21,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash 801898302, now seen corresponding path program 1 times [2023-04-01 00:17:21,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:21,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129224064] [2023-04-01 00:17:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:21,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:17:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:17:23,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:17:23,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129224064] [2023-04-01 00:17:23,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129224064] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:17:23,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:17:23,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:17:23,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84072814] [2023-04-01 00:17:23,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:17:23,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:17:23,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:17:23,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:17:23,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:17:23,194 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 00:17:24,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:17:24,161 INFO L93 Difference]: Finished difference Result 277 states and 381 transitions. [2023-04-01 00:17:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:17:24,162 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2023-04-01 00:17:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:17:24,163 INFO L225 Difference]: With dead ends: 277 [2023-04-01 00:17:24,163 INFO L226 Difference]: Without dead ends: 237 [2023-04-01 00:17:24,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:17:24,165 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 317 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 00:17:24,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 97 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 00:17:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-04-01 00:17:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2023-04-01 00:17:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5321637426900585) internal successors, (262), 172 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 00:17:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 291 transitions. [2023-04-01 00:17:24,191 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 291 transitions. Word has length 88 [2023-04-01 00:17:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:17:24,191 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 291 transitions. [2023-04-01 00:17:24,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 00:17:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 291 transitions. [2023-04-01 00:17:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 00:17:24,196 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:24,196 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] [2023-04-01 00:17:24,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:17:24,196 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:24,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2071537117, now seen corresponding path program 1 times [2023-04-01 00:17:24,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:24,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254751631] [2023-04-01 00:17:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:24,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:17:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:17:26,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:17:26,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254751631] [2023-04-01 00:17:26,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254751631] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:17:26,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:17:26,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:17:26,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119446560] [2023-04-01 00:17:26,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:17:26,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:17:26,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:17:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:17:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:17:26,142 INFO L87 Difference]: Start difference. First operand 201 states and 291 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 00:17:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:17:27,330 INFO L93 Difference]: Finished difference Result 283 states and 386 transitions. [2023-04-01 00:17:27,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:17:27,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-04-01 00:17:27,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:17:27,332 INFO L225 Difference]: With dead ends: 283 [2023-04-01 00:17:27,332 INFO L226 Difference]: Without dead ends: 243 [2023-04-01 00:17:27,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:17:27,333 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 576 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:17:27,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 100 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2091 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 00:17:27,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-01 00:17:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 201. [2023-04-01 00:17:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 172 states have internal predecessors, (261), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 00:17:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 290 transitions. [2023-04-01 00:17:27,357 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 290 transitions. Word has length 89 [2023-04-01 00:17:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:17:27,358 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 290 transitions. [2023-04-01 00:17:27,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 00:17:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 290 transitions. [2023-04-01 00:17:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 00:17:27,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:27,359 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] [2023-04-01 00:17:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:17:27,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:27,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1180895573, now seen corresponding path program 1 times [2023-04-01 00:17:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:27,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811111262] [2023-04-01 00:17:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:27,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:17:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:17:31,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:17:31,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811111262] [2023-04-01 00:17:31,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811111262] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:17:31,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:17:31,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 00:17:31,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946818194] [2023-04-01 00:17:31,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:17:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 00:17:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:17:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 00:17:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:17:31,030 INFO L87 Difference]: Start difference. First operand 201 states and 290 transitions. Second operand has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 00:17:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:17:32,872 INFO L93 Difference]: Finished difference Result 278 states and 389 transitions. [2023-04-01 00:17:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 00:17:32,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 91 [2023-04-01 00:17:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:17:32,875 INFO L225 Difference]: With dead ends: 278 [2023-04-01 00:17:32,875 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 00:17:32,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 00:17:32,885 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1871 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 2280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:17:32,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1874 Valid, 117 Invalid, 2280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2124 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 00:17:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 00:17:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 203. [2023-04-01 00:17:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 173 states have (on average 1.5144508670520231) internal successors, (262), 174 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 00:17:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 291 transitions. [2023-04-01 00:17:32,918 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 291 transitions. Word has length 91 [2023-04-01 00:17:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:17:32,918 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 291 transitions. [2023-04-01 00:17:32,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 00:17:32,918 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 291 transitions. [2023-04-01 00:17:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 00:17:32,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:32,919 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] [2023-04-01 00:17:32,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:17:32,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:32,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:32,920 INFO L85 PathProgramCache]: Analyzing trace with hash 790682101, now seen corresponding path program 1 times [2023-04-01 00:17:32,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:32,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529261724] [2023-04-01 00:17:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:32,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:17:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:17:35,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:17:35,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529261724] [2023-04-01 00:17:35,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529261724] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:17:35,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:17:35,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:17:35,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626208756] [2023-04-01 00:17:35,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:17:35,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:17:35,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:17:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:17:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:17:35,192 INFO L87 Difference]: Start difference. First operand 203 states and 291 transitions. Second operand has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 00:17:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:17:36,327 INFO L93 Difference]: Finished difference Result 295 states and 409 transitions. [2023-04-01 00:17:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:17:36,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2023-04-01 00:17:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:17:36,329 INFO L225 Difference]: With dead ends: 295 [2023-04-01 00:17:36,329 INFO L226 Difference]: Without dead ends: 248 [2023-04-01 00:17:36,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:17:36,331 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 555 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:17:36,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 106 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 00:17:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-01 00:17:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2023-04-01 00:17:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 191 states have (on average 1.4659685863874345) internal successors, (280), 192 states have internal predecessors, (280), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2023-04-01 00:17:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 322 transitions. [2023-04-01 00:17:36,362 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 322 transitions. Word has length 92 [2023-04-01 00:17:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:17:36,362 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 322 transitions. [2023-04-01 00:17:36,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 00:17:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 322 transitions. [2023-04-01 00:17:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 00:17:36,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:36,363 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] [2023-04-01 00:17:36,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:17:36,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:36,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:36,364 INFO L85 PathProgramCache]: Analyzing trace with hash -495969989, now seen corresponding path program 1 times [2023-04-01 00:17:36,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:36,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162897268] [2023-04-01 00:17:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:36,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:17:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:17:43,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:17:43,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162897268] [2023-04-01 00:17:43,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162897268] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:17:43,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:17:43,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-01 00:17:43,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511273612] [2023-04-01 00:17:43,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:17:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 00:17:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:17:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 00:17:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2023-04-01 00:17:43,188 INFO L87 Difference]: Start difference. First operand 233 states and 322 transitions. Second operand has 25 states, 15 states have (on average 5.066666666666666) internal successors, (76), 16 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 00:17:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:17:48,943 INFO L93 Difference]: Finished difference Result 527 states and 689 transitions. [2023-04-01 00:17:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 00:17:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 15 states have (on average 5.066666666666666) internal successors, (76), 16 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 94 [2023-04-01 00:17:48,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:17:48,945 INFO L225 Difference]: With dead ends: 527 [2023-04-01 00:17:48,945 INFO L226 Difference]: Without dead ends: 454 [2023-04-01 00:17:48,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=917, Invalid=4339, Unknown=0, NotChecked=0, Total=5256 [2023-04-01 00:17:48,950 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2376 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 3227 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2387 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 3227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:17:48,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2387 Valid, 215 Invalid, 3423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 3227 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 00:17:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-04-01 00:17:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 329. [2023-04-01 00:17:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 274 states have (on average 1.4562043795620438) internal successors, (399), 276 states have internal predecessors, (399), 27 states have call successors, (27), 27 states have call predecessors, (27), 27 states have return successors, (28), 25 states have call predecessors, (28), 26 states have call successors, (28) [2023-04-01 00:17:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 454 transitions. [2023-04-01 00:17:49,040 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 454 transitions. Word has length 94 [2023-04-01 00:17:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:17:49,041 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 454 transitions. [2023-04-01 00:17:49,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 15 states have (on average 5.066666666666666) internal successors, (76), 16 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 00:17:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 454 transitions. [2023-04-01 00:17:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 00:17:49,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:49,042 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] [2023-04-01 00:17:49,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:17:49,042 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:49,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 683016016, now seen corresponding path program 1 times [2023-04-01 00:17:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613120122] [2023-04-01 00:17:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:49,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:17:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:17:50,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:17:50,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613120122] [2023-04-01 00:17:50,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613120122] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:17:50,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:17:50,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 00:17:50,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243274854] [2023-04-01 00:17:50,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:17:50,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 00:17:50,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:17:50,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 00:17:50,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 00:17:50,852 INFO L87 Difference]: Start difference. First operand 329 states and 454 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 00:17:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:17:51,366 INFO L93 Difference]: Finished difference Result 365 states and 499 transitions. [2023-04-01 00:17:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 00:17:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-04-01 00:17:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:17:51,370 INFO L225 Difference]: With dead ends: 365 [2023-04-01 00:17:51,370 INFO L226 Difference]: Without dead ends: 363 [2023-04-01 00:17:51,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:17:51,372 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 35 mSDsluCounter, 2447 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2677 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:17:51,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2677 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:17:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-04-01 00:17:51,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 339. [2023-04-01 00:17:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 280 states have (on average 1.4464285714285714) internal successors, (405), 284 states have internal predecessors, (405), 28 states have call successors, (28), 28 states have call predecessors, (28), 30 states have return successors, (31), 26 states have call predecessors, (31), 27 states have call successors, (31) [2023-04-01 00:17:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 464 transitions. [2023-04-01 00:17:51,491 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 464 transitions. Word has length 95 [2023-04-01 00:17:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:17:51,492 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 464 transitions. [2023-04-01 00:17:51,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 00:17:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 464 transitions. [2023-04-01 00:17:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 00:17:51,493 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:51,493 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] [2023-04-01 00:17:51,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:17:51,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:51,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:51,493 INFO L85 PathProgramCache]: Analyzing trace with hash -635241152, now seen corresponding path program 1 times [2023-04-01 00:17:51,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:51,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20915279] [2023-04-01 00:17:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:17:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:17:55,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:17:55,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20915279] [2023-04-01 00:17:55,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20915279] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:17:55,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:17:55,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 00:17:55,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849562058] [2023-04-01 00:17:55,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:17:55,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 00:17:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:17:55,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 00:17:55,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:17:55,070 INFO L87 Difference]: Start difference. First operand 339 states and 464 transitions. Second operand has 20 states, 10 states have (on average 7.8) internal successors, (78), 12 states have internal predecessors, (78), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 00:17:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:17:56,714 INFO L93 Difference]: Finished difference Result 434 states and 577 transitions. [2023-04-01 00:17:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 00:17:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.8) internal successors, (78), 12 states have internal predecessors, (78), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 96 [2023-04-01 00:17:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:17:56,722 INFO L225 Difference]: With dead ends: 434 [2023-04-01 00:17:56,722 INFO L226 Difference]: Without dead ends: 353 [2023-04-01 00:17:56,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 00:17:56,746 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1023 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:17:56,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 156 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2644 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 00:17:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-04-01 00:17:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 241. [2023-04-01 00:17:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 196 states have (on average 1.4489795918367347) internal successors, (284), 198 states have internal predecessors, (284), 22 states have call successors, (22), 22 states have call predecessors, (22), 22 states have return successors, (23), 20 states have call predecessors, (23), 21 states have call successors, (23) [2023-04-01 00:17:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 329 transitions. [2023-04-01 00:17:56,816 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 329 transitions. Word has length 96 [2023-04-01 00:17:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:17:56,817 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 329 transitions. [2023-04-01 00:17:56,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.8) internal successors, (78), 12 states have internal predecessors, (78), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 00:17:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 329 transitions. [2023-04-01 00:17:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-01 00:17:56,822 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:56,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:17:56,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:17:56,823 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:56,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash -699775038, now seen corresponding path program 1 times [2023-04-01 00:17:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:56,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703567296] [2023-04-01 00:17:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:56,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms