/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.3.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:20:21,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:20:21,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:20:21,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:20:21,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:20:21,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:20:21,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:20:21,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:20:21,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:20:21,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:20:21,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:20:21,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:20:21,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:20:21,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:20:21,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:20:21,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:20:21,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:20:21,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:20:21,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:20:21,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:20:21,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:20:21,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:20:21,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:20:21,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:20:21,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:20:21,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:20:21,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:20:21,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:20:21,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:20:21,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:20:21,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:20:21,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:20:21,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:20:21,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:20:21,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:20:21,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:20:21,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:20:21,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:20:21,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:20:21,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:20:21,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:20:21,752 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 12:20:21,778 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:20:21,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:20:21,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:20:21,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:20:21,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:20:21,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:20:21,780 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:20:21,780 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:20:21,780 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:20:21,780 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:20:21,781 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:20:21,781 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:20:21,781 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:20:21,781 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:20:21,782 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:20:21,782 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:20:21,782 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:20:21,782 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:20:21,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:20:21,783 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:20:21,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:20:21,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:20:21,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:20:21,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:20:21,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:20:21,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:20:21,784 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:20:21,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:20:21,784 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:20:21,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:20:21,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:20:21,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:20:21,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:20:21,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:20:21,785 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:20:21,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:20:21,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:20:21,786 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:20:21,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:20:21,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:20:21,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:20:21,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:20:22,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:20:22,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:20:22,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:20:22,062 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:20:22,062 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:20:22,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c [2023-04-01 12:20:23,177 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:20:23,411 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:20:23,412 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c [2023-04-01 12:20:23,419 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e69d4944/5af51f8f83c84812821c6abfd97f4924/FLAGb4df682bf [2023-04-01 12:20:23,430 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e69d4944/5af51f8f83c84812821c6abfd97f4924 [2023-04-01 12:20:23,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:20:23,433 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:20:23,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:20:23,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:20:23,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:20:23,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1525aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23, skipping insertion in model container [2023-04-01 12:20:23,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:20:23,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:20:23,715 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.3.3.ufo.BOUNDED-6.pals.c[12764,12777] [2023-04-01 12:20:23,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:20:23,742 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:20:23,807 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.3.3.ufo.BOUNDED-6.pals.c[12764,12777] [2023-04-01 12:20:23,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:20:23,826 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:20:23,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23 WrapperNode [2023-04-01 12:20:23,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:20:23,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:20:23,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:20:23,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:20:23,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,900 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:20:23,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:20:23,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:20:23,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:20:23,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23" (1/1) ... [2023-04-01 12:20:23,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:20:23,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:20:23,941 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 12:20:23,963 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 12:20:23,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:20:23,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:20:23,979 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:20:23,979 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 12:20:23,979 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 12:20:23,979 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 12:20:23,979 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:20:23,980 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:20:23,980 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:20:23,980 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:20:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:20:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:20:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:20:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:20:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:20:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:20:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:20:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:20:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:20:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:20:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:20:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:20:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:20:23,982 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:20:23,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:20:23,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:20:23,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:20:23,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:20:23,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:20:23,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:20:23,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:20:24,066 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:20:24,068 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:20:24,551 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:20:24,927 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:20:24,928 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:20:24,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:20:24 BoogieIcfgContainer [2023-04-01 12:20:24,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:20:24,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:20:24,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:20:24,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:20:24,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:20:23" (1/3) ... [2023-04-01 12:20:24,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4714030c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:20:24, skipping insertion in model container [2023-04-01 12:20:24,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:23" (2/3) ... [2023-04-01 12:20:24,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4714030c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:20:24, skipping insertion in model container [2023-04-01 12:20:24,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:20:24" (3/3) ... [2023-04-01 12:20:24,941 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c [2023-04-01 12:20:24,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:20:24,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:20:25,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:20:25,006 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;@59bbb4ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:20:25,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:20:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 12:20:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 12:20:25,017 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:25,018 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] [2023-04-01 12:20:25,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:25,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:25,025 INFO L85 PathProgramCache]: Analyzing trace with hash 466152659, now seen corresponding path program 1 times [2023-04-01 12:20:25,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:25,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741474788] [2023-04-01 12:20:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:25,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:28,035 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 12:20:28,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:28,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741474788] [2023-04-01 12:20:28,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741474788] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:28,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:28,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 12:20:28,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114860974] [2023-04-01 12:20:28,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:28,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 12:20:28,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:28,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 12:20:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:20:28,068 INFO L87 Difference]: Start difference. First operand has 47 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:20:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:28,932 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2023-04-01 12:20:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 12:20:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-04-01 12:20:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:28,943 INFO L225 Difference]: With dead ends: 119 [2023-04-01 12:20:28,943 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 12:20:28,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-04-01 12:20:28,951 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 313 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:28,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 104 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:20:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 12:20:28,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2023-04-01 12:20:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 12:20:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2023-04-01 12:20:29,004 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 30 [2023-04-01 12:20:29,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:29,004 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2023-04-01 12:20:29,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:20:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2023-04-01 12:20:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 12:20:29,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:29,007 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] [2023-04-01 12:20:29,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:20:29,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:29,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1710709580, now seen corresponding path program 1 times [2023-04-01 12:20:29,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:29,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745981703] [2023-04-01 12:20:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:29,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:30,836 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 12:20:30,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:30,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745981703] [2023-04-01 12:20:30,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745981703] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:30,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:30,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:20:30,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687907074] [2023-04-01 12:20:30,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:30,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:20:30,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:30,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:20:30,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:20:30,842 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:20:31,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:31,619 INFO L93 Difference]: Finished difference Result 147 states and 180 transitions. [2023-04-01 12:20:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 12:20:31,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 31 [2023-04-01 12:20:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:31,621 INFO L225 Difference]: With dead ends: 147 [2023-04-01 12:20:31,622 INFO L226 Difference]: Without dead ends: 110 [2023-04-01 12:20:31,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 12:20:31,624 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 435 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:31,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 105 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:20:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-01 12:20:31,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 70. [2023-04-01 12:20:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 47 states have internal predecessors, (65), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:20:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-04-01 12:20:31,642 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 31 [2023-04-01 12:20:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:31,642 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-04-01 12:20:31,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:20:31,643 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-04-01 12:20:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 12:20:31,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:31,643 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] [2023-04-01 12:20:31,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:20:31,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:31,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1550987428, now seen corresponding path program 1 times [2023-04-01 12:20:31,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:31,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060113951] [2023-04-01 12:20:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:31,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:33,006 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 12:20:33,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:33,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060113951] [2023-04-01 12:20:33,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060113951] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:33,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:33,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:20:33,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589642182] [2023-04-01 12:20:33,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:33,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:20:33,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:33,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:20:33,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:20:33,011 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:20:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:33,387 INFO L93 Difference]: Finished difference Result 141 states and 171 transitions. [2023-04-01 12:20:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:20:33,387 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2023-04-01 12:20:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:33,389 INFO L225 Difference]: With dead ends: 141 [2023-04-01 12:20:33,389 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 12:20:33,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:20:33,390 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 97 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:33,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 78 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:20:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 12:20:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2023-04-01 12:20:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:20:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2023-04-01 12:20:33,413 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 32 [2023-04-01 12:20:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:33,413 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2023-04-01 12:20:33,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:20:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2023-04-01 12:20:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 12:20:33,414 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:33,415 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] [2023-04-01 12:20:33,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:20:33,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:33,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:33,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1522331829, now seen corresponding path program 1 times [2023-04-01 12:20:33,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:33,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663260975] [2023-04-01 12:20:33,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:33,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:34,583 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 12:20:34,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:34,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663260975] [2023-04-01 12:20:34,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663260975] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:34,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:34,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:20:34,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589157455] [2023-04-01 12:20:34,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:34,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:20:34,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:20:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:20:34,585 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:20:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:34,970 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2023-04-01 12:20:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:20:34,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2023-04-01 12:20:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:34,972 INFO L225 Difference]: With dead ends: 145 [2023-04-01 12:20:34,972 INFO L226 Difference]: Without dead ends: 108 [2023-04-01 12:20:34,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:20:34,973 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:34,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 75 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:20:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-01 12:20:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2023-04-01 12:20:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 47 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:20:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2023-04-01 12:20:35,003 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 33 [2023-04-01 12:20:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:35,004 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2023-04-01 12:20:35,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:20:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2023-04-01 12:20:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 12:20:35,006 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:35,006 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] [2023-04-01 12:20:35,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:20:35,006 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:35,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:35,007 INFO L85 PathProgramCache]: Analyzing trace with hash 308547261, now seen corresponding path program 1 times [2023-04-01 12:20:35,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:35,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248912059] [2023-04-01 12:20:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:35,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:36,731 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 12:20:36,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:36,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248912059] [2023-04-01 12:20:36,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248912059] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:36,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:36,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:20:36,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526347296] [2023-04-01 12:20:36,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:36,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:20:36,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:20:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:20:36,743 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:20:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:37,636 INFO L93 Difference]: Finished difference Result 180 states and 221 transitions. [2023-04-01 12:20:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 12:20:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2023-04-01 12:20:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:37,641 INFO L225 Difference]: With dead ends: 180 [2023-04-01 12:20:37,641 INFO L226 Difference]: Without dead ends: 140 [2023-04-01 12:20:37,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 12:20:37,647 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 401 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:37,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 134 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:20:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-04-01 12:20:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 74. [2023-04-01 12:20:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.36) internal successors, (68), 51 states have internal predecessors, (68), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:20:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2023-04-01 12:20:37,673 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 35 [2023-04-01 12:20:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:37,675 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2023-04-01 12:20:37,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:20:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2023-04-01 12:20:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 12:20:37,680 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:37,680 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] [2023-04-01 12:20:37,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:20:37,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:37,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1057315053, now seen corresponding path program 1 times [2023-04-01 12:20:37,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:37,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940575656] [2023-04-01 12:20:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:37,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:38,284 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 12:20:38,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:38,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940575656] [2023-04-01 12:20:38,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940575656] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:38,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:38,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:20:38,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564084430] [2023-04-01 12:20:38,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:38,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:20:38,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:38,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:20:38,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:20:38,287 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:20:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:38,564 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2023-04-01 12:20:38,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:20:38,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2023-04-01 12:20:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:38,566 INFO L225 Difference]: With dead ends: 145 [2023-04-01 12:20:38,566 INFO L226 Difference]: Without dead ends: 100 [2023-04-01 12:20:38,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:20:38,567 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:38,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 73 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:20:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-01 12:20:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2023-04-01 12:20:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:20:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2023-04-01 12:20:38,586 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 36 [2023-04-01 12:20:38,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:38,586 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2023-04-01 12:20:38,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:20:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2023-04-01 12:20:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 12:20:38,587 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:38,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:20:38,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:20:38,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:38,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1664650023, now seen corresponding path program 1 times [2023-04-01 12:20:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:38,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449851301] [2023-04-01 12:20:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:38,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:20:40,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:40,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449851301] [2023-04-01 12:20:40,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449851301] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:40,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:40,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:20:40,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278015960] [2023-04-01 12:20:40,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:40,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:20:40,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:40,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:20:40,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:20:40,251 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 16 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:20:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:41,041 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2023-04-01 12:20:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 12:20:41,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2023-04-01 12:20:41,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:41,042 INFO L225 Difference]: With dead ends: 156 [2023-04-01 12:20:41,042 INFO L226 Difference]: Without dead ends: 117 [2023-04-01 12:20:41,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 12:20:41,044 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 315 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:41,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 115 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:20:41,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-01 12:20:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 71. [2023-04-01 12:20:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:20:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-04-01 12:20:41,062 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 38 [2023-04-01 12:20:41,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:41,063 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-04-01 12:20:41,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:20:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-04-01 12:20:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 12:20:41,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:41,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:20:41,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:20:41,064 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:41,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash 59660117, now seen corresponding path program 1 times [2023-04-01 12:20:41,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:41,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757078715] [2023-04-01 12:20:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:41,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:41,308 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 12:20:41,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:41,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757078715] [2023-04-01 12:20:41,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757078715] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:41,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:41,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:20:41,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857275431] [2023-04-01 12:20:41,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:41,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:20:41,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:41,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:20:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:20:41,310 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 12:20:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:41,501 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2023-04-01 12:20:41,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:20:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-04-01 12:20:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:41,504 INFO L225 Difference]: With dead ends: 106 [2023-04-01 12:20:41,504 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 12:20:41,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:20:41,505 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:41,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 408 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:20:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 12:20:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2023-04-01 12:20:41,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-01 12:20:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-04-01 12:20:41,526 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 39 [2023-04-01 12:20:41,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:41,526 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-04-01 12:20:41,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 12:20:41,526 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-04-01 12:20:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:20:41,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:41,527 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:20:41,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:20:41,527 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:41,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:41,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1821725225, now seen corresponding path program 1 times [2023-04-01 12:20:41,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:41,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741261952] [2023-04-01 12:20:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:41,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:20:44,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:44,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741261952] [2023-04-01 12:20:44,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741261952] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:20:44,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261652348] [2023-04-01 12:20:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:44,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:20:44,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:20:44,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:20:44,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:20:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:44,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 78 conjunts are in the unsatisfiable core [2023-04-01 12:20:44,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:20:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:20:55,466 INFO L327 TraceCheckSpWp]: Computing backward predicates...