/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:21:05,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:21:05,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:21:05,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:21:05,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:21:05,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:21:05,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:21:05,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:21:05,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:21:05,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:21:05,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:21:05,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:21:05,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:21:05,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:21:05,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:21:05,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:21:05,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:21:05,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:21:05,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:21:05,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:21:05,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:21:05,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:21:05,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:21:05,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:21:05,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:21:05,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:21:05,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:21:05,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:21:05,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:21:05,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:21:05,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:21:05,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:21:05,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:21:05,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:21:05,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:21:05,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:21:05,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:21:05,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:21:05,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:21:05,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:21:05,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:21:05,812 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 12:21:05,841 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:21:05,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:21:05,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:21:05,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:21:05,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:21:05,843 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:21:05,843 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:21:05,844 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:21:05,844 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:21:05,844 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:21:05,844 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:21:05,845 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:21:05,845 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:21:05,845 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:21:05,845 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:21:05,845 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:21:05,845 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:21:05,845 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:21:05,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:21:05,846 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:21:05,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:21:05,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:21:05,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:21:05,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:21:05,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:21:05,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:21:05,847 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:21:05,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:21:05,848 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:21:05,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:21:05,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:21:05,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:21:05,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:21:05,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:21:05,848 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:21:05,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:21:05,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:21:05,849 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:21:05,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:21:05,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:21:05,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:21:05,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:21:06,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:21:06,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:21:06,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:21:06,107 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:21:06,108 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:21:06,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-04-01 12:21:07,295 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:21:07,522 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:21:07,522 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-04-01 12:21:07,538 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4508a6ada/5ac96a367f2943538517a7eb5e2bd72b/FLAG216983782 [2023-04-01 12:21:07,550 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4508a6ada/5ac96a367f2943538517a7eb5e2bd72b [2023-04-01 12:21:07,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:21:07,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:21:07,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:21:07,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:21:07,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:21:07,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b3a87f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07, skipping insertion in model container [2023-04-01 12:21:07,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:21:07,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:21:07,849 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_floodmax.4.2.ufo.UNBOUNDED.pals.c[28368,28381] [2023-04-01 12:21:07,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:21:07,870 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:21:07,949 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_floodmax.4.2.ufo.UNBOUNDED.pals.c[28368,28381] [2023-04-01 12:21:07,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:21:07,966 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:21:07,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07 WrapperNode [2023-04-01 12:21:07,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:21:07,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:21:07,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:21:07,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:21:07,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:08,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:08,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:08,042 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:08,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:08,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:21:08,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:21:08,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:21:08,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:21:08,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:08,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:21:08,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:21:08,118 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 12:21:08,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:21:08,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:21:08,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:21:08,160 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:21:08,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:21:08,161 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 12:21:08,161 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 12:21:08,161 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 12:21:08,162 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 12:21:08,162 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:21:08,162 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:21:08,162 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:21:08,162 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:21:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:21:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:21:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:21:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:21:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:21:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:21:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:21:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:21:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:21:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:21:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:21:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:21:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:21:08,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:21:08,298 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:21:08,300 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:21:09,274 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:21:10,018 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:21:10,018 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:21:10,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:21:10 BoogieIcfgContainer [2023-04-01 12:21:10,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:21:10,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:21:10,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:21:10,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:21:10,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:21:07" (1/3) ... [2023-04-01 12:21:10,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266701bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:21:10, skipping insertion in model container [2023-04-01 12:21:10,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (2/3) ... [2023-04-01 12:21:10,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266701bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:21:10, skipping insertion in model container [2023-04-01 12:21:10,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:21:10" (3/3) ... [2023-04-01 12:21:10,031 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-04-01 12:21:10,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:21:10,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:21:10,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:21:10,112 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;@6739316e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:21:10,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:21:10,119 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 12:21:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 12:21:10,128 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:10,129 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 12:21:10,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:10,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:10,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1613895835, now seen corresponding path program 1 times [2023-04-01 12:21:10,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:10,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307974627] [2023-04-01 12:21:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:10,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:17,600 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 12:21:17,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307974627] [2023-04-01 12:21:17,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307974627] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:17,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:17,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 12:21:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097890264] [2023-04-01 12:21:17,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:17,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 12:21:17,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:17,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 12:21:17,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:21:17,657 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 12:21:19,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:19,991 INFO L93 Difference]: Finished difference Result 266 states and 386 transitions. [2023-04-01 12:21:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 12:21:19,994 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 12:21:19,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:20,014 INFO L225 Difference]: With dead ends: 266 [2023-04-01 12:21:20,014 INFO L226 Difference]: Without dead ends: 225 [2023-04-01 12:21:20,018 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 12:21:20,022 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1380 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:20,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 138 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 12:21:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-04-01 12:21:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2023-04-01 12:21:20,104 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 12:21:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2023-04-01 12:21:20,108 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 85 [2023-04-01 12:21:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:20,110 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2023-04-01 12:21:20,110 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 12:21:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2023-04-01 12:21:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 12:21:20,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:20,120 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 12:21:20,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:21:20,120 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:20,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1092511881, now seen corresponding path program 1 times [2023-04-01 12:21:20,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:20,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337722982] [2023-04-01 12:21:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:20,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:22,778 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 12:21:22,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:22,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337722982] [2023-04-01 12:21:22,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337722982] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:22,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:22,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295479534] [2023-04-01 12:21:22,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:22,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:22,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:22,782 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 12:21:23,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:23,990 INFO L93 Difference]: Finished difference Result 277 states and 392 transitions. [2023-04-01 12:21:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:23,990 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 12:21:23,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:23,992 INFO L225 Difference]: With dead ends: 277 [2023-04-01 12:21:23,993 INFO L226 Difference]: Without dead ends: 232 [2023-04-01 12:21:23,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:21:23,994 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 567 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:23,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 87 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:21:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-01 12:21:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2023-04-01 12:21:24,017 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 12:21:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 293 transitions. [2023-04-01 12:21:24,018 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 293 transitions. Word has length 86 [2023-04-01 12:21:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:24,018 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 293 transitions. [2023-04-01 12:21:24,018 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 12:21:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 293 transitions. [2023-04-01 12:21:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 12:21:24,019 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:24,020 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 12:21:24,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:21:24,020 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:24,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash 198516558, now seen corresponding path program 1 times [2023-04-01 12:21:24,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:24,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967676821] [2023-04-01 12:21:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:26,660 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 12:21:26,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:26,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967676821] [2023-04-01 12:21:26,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967676821] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:26,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:26,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:26,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246958019] [2023-04-01 12:21:26,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:26,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:26,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:26,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:26,665 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 12:21:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:27,933 INFO L93 Difference]: Finished difference Result 271 states and 376 transitions. [2023-04-01 12:21:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:27,934 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 12:21:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:27,935 INFO L225 Difference]: With dead ends: 271 [2023-04-01 12:21:27,936 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 12:21:27,936 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 12:21:27,937 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 570 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:27,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 96 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 12:21:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 12:21:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2023-04-01 12:21:27,960 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 12:21:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2023-04-01 12:21:27,962 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 87 [2023-04-01 12:21:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:27,962 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2023-04-01 12:21:27,962 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 12:21:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2023-04-01 12:21:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 12:21:27,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:27,964 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 12:21:27,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:21:27,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:27,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:27,965 INFO L85 PathProgramCache]: Analyzing trace with hash -638823278, now seen corresponding path program 1 times [2023-04-01 12:21:27,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:27,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212269645] [2023-04-01 12:21:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:30,360 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 12:21:30,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:30,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212269645] [2023-04-01 12:21:30,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212269645] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:30,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:30,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:30,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30377125] [2023-04-01 12:21:30,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:30,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:30,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:30,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:30,363 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 12:21:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:31,436 INFO L93 Difference]: Finished difference Result 279 states and 383 transitions. [2023-04-01 12:21:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:31,437 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 12:21:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:31,438 INFO L225 Difference]: With dead ends: 279 [2023-04-01 12:21:31,438 INFO L226 Difference]: Without dead ends: 239 [2023-04-01 12:21:31,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 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 12:21:31,440 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 302 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:31,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 97 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 12:21:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-04-01 12:21:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 201. [2023-04-01 12:21:31,470 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 12:21:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 291 transitions. [2023-04-01 12:21:31,472 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 291 transitions. Word has length 88 [2023-04-01 12:21:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:31,472 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 291 transitions. [2023-04-01 12:21:31,472 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 12:21:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 291 transitions. [2023-04-01 12:21:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 12:21:31,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:31,479 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 12:21:31,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:21:31,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:31,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash 280156983, now seen corresponding path program 1 times [2023-04-01 12:21:31,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:31,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592946005] [2023-04-01 12:21:31,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:31,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:33,769 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 12:21:33,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:33,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592946005] [2023-04-01 12:21:33,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592946005] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:33,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:33,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:33,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185358956] [2023-04-01 12:21:33,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:33,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:33,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:33,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:33,780 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 12:21:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:34,898 INFO L93 Difference]: Finished difference Result 283 states and 386 transitions. [2023-04-01 12:21:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:34,899 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 12:21:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:34,900 INFO L225 Difference]: With dead ends: 283 [2023-04-01 12:21:34,900 INFO L226 Difference]: Without dead ends: 243 [2023-04-01 12:21:34,901 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 12:21:34,902 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 585 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:34,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 93 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1826 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:21:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-01 12:21:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 201. [2023-04-01 12:21:34,925 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 12:21:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 290 transitions. [2023-04-01 12:21:34,926 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 290 transitions. Word has length 89 [2023-04-01 12:21:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:34,927 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 290 transitions. [2023-04-01 12:21:34,927 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 12:21:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 290 transitions. [2023-04-01 12:21:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 12:21:34,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:34,928 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 12:21:34,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:21:34,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:34,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash 855801791, now seen corresponding path program 1 times [2023-04-01 12:21:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:34,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965591632] [2023-04-01 12:21:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:34,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:38,531 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 12:21:38,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:38,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965591632] [2023-04-01 12:21:38,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965591632] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:38,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:38,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 12:21:38,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087175566] [2023-04-01 12:21:38,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:38,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 12:21:38,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 12:21:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:21:38,534 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 12:21:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:40,434 INFO L93 Difference]: Finished difference Result 278 states and 389 transitions. [2023-04-01 12:21:40,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 12:21:40,435 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 12:21:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:40,436 INFO L225 Difference]: With dead ends: 278 [2023-04-01 12:21:40,436 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 12:21:40,437 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 12:21:40,438 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1090 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2200 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:40,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 137 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2200 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 12:21:40,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 12:21:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 203. [2023-04-01 12:21:40,471 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 12:21:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 291 transitions. [2023-04-01 12:21:40,473 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 291 transitions. Word has length 91 [2023-04-01 12:21:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:40,473 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 291 transitions. [2023-04-01 12:21:40,474 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 12:21:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 291 transitions. [2023-04-01 12:21:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 12:21:40,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:40,475 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 12:21:40,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:21:40,475 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:40,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:40,476 INFO L85 PathProgramCache]: Analyzing trace with hash -726786231, now seen corresponding path program 1 times [2023-04-01 12:21:40,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:40,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442130396] [2023-04-01 12:21:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:40,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:42,701 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 12:21:42,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:42,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442130396] [2023-04-01 12:21:42,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442130396] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:42,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:42,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:42,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173731002] [2023-04-01 12:21:42,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:42,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:42,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:42,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:42,703 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 12:21:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:43,991 INFO L93 Difference]: Finished difference Result 295 states and 409 transitions. [2023-04-01 12:21:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:43,992 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 12:21:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:43,993 INFO L225 Difference]: With dead ends: 295 [2023-04-01 12:21:43,994 INFO L226 Difference]: Without dead ends: 248 [2023-04-01 12:21:43,994 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 12:21:43,995 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 555 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:43,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 111 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2154 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 12:21:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-01 12:21:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2023-04-01 12:21:44,028 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 12:21:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 322 transitions. [2023-04-01 12:21:44,030 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 322 transitions. Word has length 92 [2023-04-01 12:21:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:44,030 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 322 transitions. [2023-04-01 12:21:44,030 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 12:21:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 322 transitions. [2023-04-01 12:21:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 12:21:44,031 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:44,031 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 12:21:44,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:21:44,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:44,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1577658737, now seen corresponding path program 1 times [2023-04-01 12:21:44,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:44,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063470156] [2023-04-01 12:21:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:44,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:48,355 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 12:21:48,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:48,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063470156] [2023-04-01 12:21:48,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063470156] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:48,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:48,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-01 12:21:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876419461] [2023-04-01 12:21:48,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:48,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 12:21:48,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 12:21:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2023-04-01 12:21:48,357 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 12:21:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:52,372 INFO L93 Difference]: Finished difference Result 795 states and 1096 transitions. [2023-04-01 12:21:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 12:21:52,372 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 12:21:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:52,378 INFO L225 Difference]: With dead ends: 795 [2023-04-01 12:21:52,378 INFO L226 Difference]: Without dead ends: 577 [2023-04-01 12:21:52,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=860, Invalid=3970, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 12:21:52,386 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 4296 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 3232 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4308 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 3232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:52,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4308 Valid, 199 Invalid, 3458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 3232 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 12:21:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-04-01 12:21:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 444. [2023-04-01 12:21:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 389 states have (on average 1.4730077120822622) internal successors, (573), 391 states have internal predecessors, (573), 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 12:21:52,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 628 transitions. [2023-04-01 12:21:52,508 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 628 transitions. Word has length 94 [2023-04-01 12:21:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:52,508 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 628 transitions. [2023-04-01 12:21:52,508 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 12:21:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 628 transitions. [2023-04-01 12:21:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 12:21:52,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:52,510 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 12:21:52,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:21:52,510 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:52,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:52,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1192173294, now seen corresponding path program 1 times [2023-04-01 12:21:52,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:52,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000560032] [2023-04-01 12:21:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:52,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat