/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 OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:22:38,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:22:38,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:22:38,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-03 02:22:38,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:22:38,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:22:38,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:22:38,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:22:38,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:22:38,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:22:38,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:22:38,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:22:38,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:22:38,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:22:38,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:22:38,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:22:38,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:22:38,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:22:38,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:22:38,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:22:38,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:22:38,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:22:38,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:22:38,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:22:38,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:22:38,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:22:38,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:22:38,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:22:38,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:22:38,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:22:38,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:22:38,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:22:38,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:22:38,787 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 [2023-04-03 02:22:38,823 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:22:38,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:22:38,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:22:38,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:22:38,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:22:38,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:22:38,825 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:22:38,826 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:22:38,826 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:22:38,826 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:22:38,827 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:22:38,827 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:22:38,827 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:22:38,827 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:22:38,827 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:22:38,828 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:22:38,828 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:22:38,828 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:22:38,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:22:38,829 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:22:38,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:22:38,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:22:38,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:22:38,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:22:38,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:22:38,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:22:38,830 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:22:38,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:22:38,830 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:22:38,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:22:38,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:22:38,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:22:38,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:22:38,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:22:38,831 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:22:38,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:22:38,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:22:38,832 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:22:38,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:22:38,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:22:38,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:22:38,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:22:39,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:22:39,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:22:39,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:22:39,104 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:22:39,105 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:22:39,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:22:40,427 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:22:40,663 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:22:40,663 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:22:40,673 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556861df4/7b416a234aa84eae9ea614ea78a2d719/FLAG416424700 [2023-04-03 02:22:40,686 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556861df4/7b416a234aa84eae9ea614ea78a2d719 [2023-04-03 02:22:40,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:22:40,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:22:40,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:22:40,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:22:40,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:22:40,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:22:40" (1/1) ... [2023-04-03 02:22:40,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7332a7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:40, skipping insertion in model container [2023-04-03 02:22:40,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:22:40" (1/1) ... [2023-04-03 02:22:40,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:22:40,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:22:40,929 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-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7347,7360] [2023-04-03 02:22:40,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:22:40,976 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:22:41,015 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-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7347,7360] [2023-04-03 02:22:41,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:22:41,051 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:22:41,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41 WrapperNode [2023-04-03 02:22:41,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:22:41,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:22:41,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:22:41,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:22:41,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41" (1/1) ... [2023-04-03 02:22:41,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41" (1/1) ... [2023-04-03 02:22:41,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41" (1/1) ... [2023-04-03 02:22:41,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41" (1/1) ... [2023-04-03 02:22:41,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41" (1/1) ... [2023-04-03 02:22:41,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41" (1/1) ... [2023-04-03 02:22:41,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41" (1/1) ... [2023-04-03 02:22:41,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41" (1/1) ... [2023-04-03 02:22:41,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:22:41,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:22:41,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:22:41,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:22:41,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41" (1/1) ... [2023-04-03 02:22:41,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:22:41,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:22:41,209 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) [2023-04-03 02:22:41,231 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 [2023-04-03 02:22:41,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:22:41,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:22:41,248 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:22:41,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:22:41,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:22:41,248 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:22:41,248 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:22:41,248 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:22:41,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:22:41,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:22:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:22:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:22:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:22:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:22:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:22:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:22:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:22:41,249 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:22:41,251 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:22:41,251 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:22:41,251 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:22:41,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:22:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:22:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:22:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:22:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:22:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:22:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:22:41,419 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:22:41,421 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:22:41,992 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:22:42,225 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:22:42,226 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:22:42,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:22:42 BoogieIcfgContainer [2023-04-03 02:22:42,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:22:42,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:22:42,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:22:42,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:22:42,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:22:40" (1/3) ... [2023-04-03 02:22:42,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d572ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:22:42, skipping insertion in model container [2023-04-03 02:22:42,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:41" (2/3) ... [2023-04-03 02:22:42,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d572ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:22:42, skipping insertion in model container [2023-04-03 02:22:42,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:22:42" (3/3) ... [2023-04-03 02:22:42,239 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:22:42,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:22:42,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:22:42,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:22:42,306 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;@696d3b30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:22:42,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:22:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 86 states have (on average 1.755813953488372) internal successors, (151), 93 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:22:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-03 02:22:42,319 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:42,320 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] [2023-04-03 02:22:42,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:42,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:42,326 INFO L85 PathProgramCache]: Analyzing trace with hash -285522315, now seen corresponding path program 1 times [2023-04-03 02:22:42,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:42,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269949151] [2023-04-03 02:22:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:42,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:22:42,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:42,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269949151] [2023-04-03 02:22:42,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269949151] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:42,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:42,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:42,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798900891] [2023-04-03 02:22:42,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:42,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:42,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:42,819 INFO L87 Difference]: Start difference. First operand has 98 states, 86 states have (on average 1.755813953488372) internal successors, (151), 93 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:42,957 INFO L93 Difference]: Finished difference Result 216 states and 324 transitions. [2023-04-03 02:22:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-03 02:22:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:42,969 INFO L225 Difference]: With dead ends: 216 [2023-04-03 02:22:42,970 INFO L226 Difference]: Without dead ends: 131 [2023-04-03 02:22:42,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:42,978 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 96 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:42,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 334 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:22:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-03 02:22:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-04-03 02:22:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.416) internal successors, (177), 125 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 180 transitions. [2023-04-03 02:22:43,047 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 180 transitions. Word has length 41 [2023-04-03 02:22:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:43,048 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 180 transitions. [2023-04-03 02:22:43,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 180 transitions. [2023-04-03 02:22:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:22:43,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:43,050 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] [2023-04-03 02:22:43,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:22:43,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:43,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:43,051 INFO L85 PathProgramCache]: Analyzing trace with hash 155439974, now seen corresponding path program 1 times [2023-04-03 02:22:43,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:43,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268203465] [2023-04-03 02:22:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:43,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:22:43,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268203465] [2023-04-03 02:22:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268203465] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:43,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:43,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050149840] [2023-04-03 02:22:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:43,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:43,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:43,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:43,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:43,316 INFO L87 Difference]: Start difference. First operand 129 states and 180 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:43,431 INFO L93 Difference]: Finished difference Result 280 states and 411 transitions. [2023-04-03 02:22:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-04-03 02:22:43,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:43,440 INFO L225 Difference]: With dead ends: 280 [2023-04-03 02:22:43,444 INFO L226 Difference]: Without dead ends: 184 [2023-04-03 02:22:43,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:43,451 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 79 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:43,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 186 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:22:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-03 02:22:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2023-04-03 02:22:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.4382022471910112) internal successors, (256), 178 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 259 transitions. [2023-04-03 02:22:43,510 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 259 transitions. Word has length 43 [2023-04-03 02:22:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:43,511 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 259 transitions. [2023-04-03 02:22:43,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 259 transitions. [2023-04-03 02:22:43,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 02:22:43,512 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:43,512 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] [2023-04-03 02:22:43,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:22:43,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:43,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2142942349, now seen corresponding path program 1 times [2023-04-03 02:22:43,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:43,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654115084] [2023-04-03 02:22:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:43,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:22:43,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:43,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654115084] [2023-04-03 02:22:43,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654115084] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:43,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:43,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:43,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446121601] [2023-04-03 02:22:43,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:43,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:43,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:43,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:43,610 INFO L87 Difference]: Start difference. First operand 182 states and 259 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:43,677 INFO L93 Difference]: Finished difference Result 442 states and 652 transitions. [2023-04-03 02:22:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-03 02:22:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:43,680 INFO L225 Difference]: With dead ends: 442 [2023-04-03 02:22:43,680 INFO L226 Difference]: Without dead ends: 294 [2023-04-03 02:22:43,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:43,689 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 79 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:43,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 235 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-04-03 02:22:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2023-04-03 02:22:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 288 states have (on average 1.4583333333333333) internal successors, (420), 288 states have internal predecessors, (420), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 423 transitions. [2023-04-03 02:22:43,735 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 423 transitions. Word has length 45 [2023-04-03 02:22:43,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:43,736 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 423 transitions. [2023-04-03 02:22:43,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,736 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 423 transitions. [2023-04-03 02:22:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 02:22:43,743 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:43,743 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] [2023-04-03 02:22:43,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:22:43,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:43,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:43,745 INFO L85 PathProgramCache]: Analyzing trace with hash -340698257, now seen corresponding path program 1 times [2023-04-03 02:22:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:43,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727168632] [2023-04-03 02:22:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:43,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:22:43,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:43,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727168632] [2023-04-03 02:22:43,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727168632] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:43,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:43,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:43,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781698616] [2023-04-03 02:22:43,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:43,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:43,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:43,851 INFO L87 Difference]: Start difference. First operand 292 states and 423 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:43,920 INFO L93 Difference]: Finished difference Result 711 states and 1056 transitions. [2023-04-03 02:22:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:43,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-03 02:22:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:43,930 INFO L225 Difference]: With dead ends: 711 [2023-04-03 02:22:43,930 INFO L226 Difference]: Without dead ends: 453 [2023-04-03 02:22:43,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:43,937 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 78 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:43,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 203 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-04-03 02:22:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2023-04-03 02:22:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 447 states have (on average 1.476510067114094) internal successors, (660), 447 states have internal predecessors, (660), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 663 transitions. [2023-04-03 02:22:43,980 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 663 transitions. Word has length 47 [2023-04-03 02:22:43,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:43,981 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 663 transitions. [2023-04-03 02:22:43,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 663 transitions. [2023-04-03 02:22:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-03 02:22:43,984 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:43,984 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] [2023-04-03 02:22:43,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:22:43,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:43,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:43,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1823786302, now seen corresponding path program 1 times [2023-04-03 02:22:43,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:43,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188445440] [2023-04-03 02:22:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:22:44,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:44,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188445440] [2023-04-03 02:22:44,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188445440] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:44,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:44,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:44,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162739883] [2023-04-03 02:22:44,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:44,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:44,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:44,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:44,085 INFO L87 Difference]: Start difference. First operand 451 states and 663 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:44,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:44,229 INFO L93 Difference]: Finished difference Result 1151 states and 1712 transitions. [2023-04-03 02:22:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:44,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-04-03 02:22:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:44,237 INFO L225 Difference]: With dead ends: 1151 [2023-04-03 02:22:44,238 INFO L226 Difference]: Without dead ends: 747 [2023-04-03 02:22:44,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:44,239 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 74 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:44,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 216 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2023-04-03 02:22:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 745. [2023-04-03 02:22:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 741 states have (on average 1.4696356275303644) internal successors, (1089), 741 states have internal predecessors, (1089), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1092 transitions. [2023-04-03 02:22:44,320 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1092 transitions. Word has length 49 [2023-04-03 02:22:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:44,322 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1092 transitions. [2023-04-03 02:22:44,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1092 transitions. [2023-04-03 02:22:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:22:44,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:44,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:22:44,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:22:44,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:44,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:44,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1467766441, now seen corresponding path program 1 times [2023-04-03 02:22:44,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:44,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348110819] [2023-04-03 02:22:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:44,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:22:44,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:44,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348110819] [2023-04-03 02:22:44,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348110819] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:44,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:44,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:44,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800245560] [2023-04-03 02:22:44,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:44,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:44,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:44,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:44,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:44,428 INFO L87 Difference]: Start difference. First operand 745 states and 1092 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:44,577 INFO L93 Difference]: Finished difference Result 1860 states and 2760 transitions. [2023-04-03 02:22:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-03 02:22:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:44,583 INFO L225 Difference]: With dead ends: 1860 [2023-04-03 02:22:44,583 INFO L226 Difference]: Without dead ends: 1162 [2023-04-03 02:22:44,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:44,585 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 73 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:44,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 205 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2023-04-03 02:22:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1160. [2023-04-03 02:22:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1156 states have (on average 1.4775086505190311) internal successors, (1708), 1156 states have internal predecessors, (1708), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1711 transitions. [2023-04-03 02:22:44,751 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1711 transitions. Word has length 51 [2023-04-03 02:22:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:44,751 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1711 transitions. [2023-04-03 02:22:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1711 transitions. [2023-04-03 02:22:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:22:44,753 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:44,753 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] [2023-04-03 02:22:44,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:22:44,753 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:44,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1266528778, now seen corresponding path program 1 times [2023-04-03 02:22:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:44,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071094207] [2023-04-03 02:22:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:44,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:22:44,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:44,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071094207] [2023-04-03 02:22:44,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071094207] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:44,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:44,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:22:44,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313501015] [2023-04-03 02:22:44,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:44,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:22:44,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:44,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:22:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:22:44,888 INFO L87 Difference]: Start difference. First operand 1160 states and 1711 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:45,285 INFO L93 Difference]: Finished difference Result 2935 states and 4364 transitions. [2023-04-03 02:22:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:22:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-03 02:22:45,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:45,295 INFO L225 Difference]: With dead ends: 2935 [2023-04-03 02:22:45,295 INFO L226 Difference]: Without dead ends: 1817 [2023-04-03 02:22:45,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:22:45,299 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 435 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:45,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 807 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:22:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2023-04-03 02:22:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1791. [2023-04-03 02:22:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1787 states have (on average 1.4868494683827644) internal successors, (2657), 1787 states have internal predecessors, (2657), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2660 transitions. [2023-04-03 02:22:45,512 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2660 transitions. Word has length 53 [2023-04-03 02:22:45,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:45,513 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2660 transitions. [2023-04-03 02:22:45,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:45,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2660 transitions. [2023-04-03 02:22:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:22:45,514 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:45,514 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] [2023-04-03 02:22:45,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:22:45,514 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:45,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:45,514 INFO L85 PathProgramCache]: Analyzing trace with hash -669296904, now seen corresponding path program 1 times [2023-04-03 02:22:45,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:45,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256957708] [2023-04-03 02:22:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:45,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:22:45,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:45,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256957708] [2023-04-03 02:22:45,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256957708] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:45,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:45,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:22:45,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688072468] [2023-04-03 02:22:45,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:45,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:22:45,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:45,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:22:45,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:22:45,642 INFO L87 Difference]: Start difference. First operand 1791 states and 2660 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:45,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:45,887 INFO L93 Difference]: Finished difference Result 3524 states and 5249 transitions. [2023-04-03 02:22:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:22:45,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-03 02:22:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:45,895 INFO L225 Difference]: With dead ends: 3524 [2023-04-03 02:22:45,895 INFO L226 Difference]: Without dead ends: 1793 [2023-04-03 02:22:45,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:22:45,900 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 144 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:45,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 299 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2023-04-03 02:22:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1788. [2023-04-03 02:22:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1784 states have (on average 1.4809417040358743) internal successors, (2642), 1784 states have internal predecessors, (2642), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2645 transitions. [2023-04-03 02:22:46,119 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2645 transitions. Word has length 54 [2023-04-03 02:22:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:46,120 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 2645 transitions. [2023-04-03 02:22:46,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2645 transitions. [2023-04-03 02:22:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:22:46,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:46,120 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] [2023-04-03 02:22:46,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:22:46,121 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:46,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:46,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1488720500, now seen corresponding path program 1 times [2023-04-03 02:22:46,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:46,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139771647] [2023-04-03 02:22:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:46,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:22:46,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:46,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139771647] [2023-04-03 02:22:46,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139771647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:46,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:46,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:22:46,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054467084] [2023-04-03 02:22:46,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:46,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:22:46,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:46,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:22:46,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:22:46,411 INFO L87 Difference]: Start difference. First operand 1788 states and 2645 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:46,796 INFO L93 Difference]: Finished difference Result 2956 states and 4320 transitions. [2023-04-03 02:22:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:22:46,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-03 02:22:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:46,811 INFO L225 Difference]: With dead ends: 2956 [2023-04-03 02:22:46,811 INFO L226 Difference]: Without dead ends: 2954 [2023-04-03 02:22:46,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:22:46,817 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 146 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:46,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 584 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2023-04-03 02:22:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 1832. [2023-04-03 02:22:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1828 states have (on average 1.4567833698030634) internal successors, (2663), 1828 states have internal predecessors, (2663), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 2666 transitions. [2023-04-03 02:22:47,132 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 2666 transitions. Word has length 62 [2023-04-03 02:22:47,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:47,132 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 2666 transitions. [2023-04-03 02:22:47,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 2666 transitions. [2023-04-03 02:22:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 02:22:47,133 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:47,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:22:47,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:22:47,134 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:47,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash -954306733, now seen corresponding path program 1 times [2023-04-03 02:22:47,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:47,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607361068] [2023-04-03 02:22:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:47,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:22:48,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:48,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607361068] [2023-04-03 02:22:48,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607361068] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:22:48,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821385128] [2023-04-03 02:22:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:48,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:22:48,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:22:48,193 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) [2023-04-03 02:22:48,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:22:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:48,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:22:48,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:22:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:22:49,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:22:49,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821385128] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:49,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:22:49,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:22:49,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339457724] [2023-04-03 02:22:49,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:49,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:22:49,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:49,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:22:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:22:49,174 INFO L87 Difference]: Start difference. First operand 1832 states and 2666 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:50,354 INFO L93 Difference]: Finished difference Result 5276 states and 7704 transitions. [2023-04-03 02:22:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:22:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-03 02:22:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:50,369 INFO L225 Difference]: With dead ends: 5276 [2023-04-03 02:22:50,369 INFO L226 Difference]: Without dead ends: 3504 [2023-04-03 02:22:50,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:22:50,373 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 246 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:50,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 298 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:50,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2023-04-03 02:22:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 3502. [2023-04-03 02:22:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3498 states have (on average 1.452544311034877) internal successors, (5081), 3498 states have internal predecessors, (5081), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 5084 transitions. [2023-04-03 02:22:51,130 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 5084 transitions. Word has length 69 [2023-04-03 02:22:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:51,131 INFO L495 AbstractCegarLoop]: Abstraction has 3502 states and 5084 transitions. [2023-04-03 02:22:51,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 5084 transitions. [2023-04-03 02:22:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:22:51,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:51,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:22:51,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 02:22:51,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-03 02:22:51,344 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:51,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:51,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1917808232, now seen corresponding path program 1 times [2023-04-03 02:22:51,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:51,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012240153] [2023-04-03 02:22:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:51,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:22:52,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:52,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012240153] [2023-04-03 02:22:52,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012240153] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:22:52,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823275860] [2023-04-03 02:22:52,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:52,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:22:52,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:22:52,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:22:52,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:22:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:52,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:22:52,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:22:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:22:52,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:22:52,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823275860] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:52,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:22:52,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:22:52,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941120921] [2023-04-03 02:22:52,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:52,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:22:52,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:22:52,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:22:52,855 INFO L87 Difference]: Start difference. First operand 3502 states and 5084 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:54,383 INFO L93 Difference]: Finished difference Result 10137 states and 14732 transitions. [2023-04-03 02:22:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:22:54,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-03 02:22:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:54,414 INFO L225 Difference]: With dead ends: 10137 [2023-04-03 02:22:54,415 INFO L226 Difference]: Without dead ends: 6680 [2023-04-03 02:22:54,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:22:54,426 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 259 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:54,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 297 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2023-04-03 02:22:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6678. [2023-04-03 02:22:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6678 states, 6674 states have (on average 1.4420137848366796) internal successors, (9624), 6674 states have internal predecessors, (9624), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 9627 transitions. [2023-04-03 02:22:55,965 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 9627 transitions. Word has length 72 [2023-04-03 02:22:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:55,965 INFO L495 AbstractCegarLoop]: Abstraction has 6678 states and 9627 transitions. [2023-04-03 02:22:55,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 9627 transitions. [2023-04-03 02:22:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:22:55,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:55,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:22:55,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 02:22:56,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-03 02:22:56,182 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:56,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:56,182 INFO L85 PathProgramCache]: Analyzing trace with hash -70523277, now seen corresponding path program 1 times [2023-04-03 02:22:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:56,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987911808] [2023-04-03 02:22:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:56,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:22:57,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987911808] [2023-04-03 02:22:57,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987911808] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:22:57,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914603235] [2023-04-03 02:22:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:57,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:22:57,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:22:57,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:22:57,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:22:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:57,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:22:57,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:22:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:22:57,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:22:57,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914603235] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:57,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:22:57,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:22:57,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221140124] [2023-04-03 02:22:57,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:57,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:22:57,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:57,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:22:57,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:22:57,590 INFO L87 Difference]: Start difference. First operand 6678 states and 9627 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:00,268 INFO L93 Difference]: Finished difference Result 19428 states and 28009 transitions. [2023-04-03 02:23:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:23:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:23:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:00,326 INFO L225 Difference]: With dead ends: 19428 [2023-04-03 02:23:00,326 INFO L226 Difference]: Without dead ends: 12822 [2023-04-03 02:23:00,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:23:00,344 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 249 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:23:00,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 299 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:23:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12822 states. [2023-04-03 02:23:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12822 to 12820. [2023-04-03 02:23:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12820 states, 12816 states have (on average 1.4318039950062422) internal successors, (18350), 12816 states have internal predecessors, (18350), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12820 states to 12820 states and 18353 transitions. [2023-04-03 02:23:02,742 INFO L78 Accepts]: Start accepts. Automaton has 12820 states and 18353 transitions. Word has length 75 [2023-04-03 02:23:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:02,742 INFO L495 AbstractCegarLoop]: Abstraction has 12820 states and 18353 transitions. [2023-04-03 02:23:02,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 12820 states and 18353 transitions. [2023-04-03 02:23:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:23:02,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:02,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:23:02,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 02:23:02,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:23:02,956 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:02,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:02,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1438491322, now seen corresponding path program 1 times [2023-04-03 02:23:02,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:02,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892771286] [2023-04-03 02:23:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:02,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:23:03,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:03,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892771286] [2023-04-03 02:23:03,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892771286] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:23:03,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85828747] [2023-04-03 02:23:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:03,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:23:03,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:23:03,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:23:03,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 02:23:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:03,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-03 02:23:03,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:23:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:23:04,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:23:04,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85828747] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:04,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:23:04,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-04-03 02:23:04,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333410459] [2023-04-03 02:23:04,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:04,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:23:04,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:23:04,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:23:04,596 INFO L87 Difference]: Start difference. First operand 12820 states and 18353 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:06,504 INFO L93 Difference]: Finished difference Result 22690 states and 32422 transitions. [2023-04-03 02:23:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:23:06,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-03 02:23:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:06,541 INFO L225 Difference]: With dead ends: 22690 [2023-04-03 02:23:06,541 INFO L226 Difference]: Without dead ends: 9950 [2023-04-03 02:23:06,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:23:06,567 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 506 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:23:06,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 221 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:23:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9950 states. [2023-04-03 02:23:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9950 to 9889. [2023-04-03 02:23:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9889 states, 9885 states have (on average 1.4267071320182094) internal successors, (14103), 9885 states have internal predecessors, (14103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 14106 transitions. [2023-04-03 02:23:08,371 INFO L78 Accepts]: Start accepts. Automaton has 9889 states and 14106 transitions. Word has length 78 [2023-04-03 02:23:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:08,371 INFO L495 AbstractCegarLoop]: Abstraction has 9889 states and 14106 transitions. [2023-04-03 02:23:08,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 9889 states and 14106 transitions. [2023-04-03 02:23:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:23:08,374 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:08,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:23:08,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 02:23:08,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:23:08,587 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:08,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:08,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1390334385, now seen corresponding path program 1 times [2023-04-03 02:23:08,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:08,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008762114] [2023-04-03 02:23:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:08,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:23:08,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:08,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008762114] [2023-04-03 02:23:08,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008762114] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:08,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:23:08,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:23:08,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002449932] [2023-04-03 02:23:08,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:08,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:23:08,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:08,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:23:08,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:23:08,720 INFO L87 Difference]: Start difference. First operand 9889 states and 14106 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:10,424 INFO L93 Difference]: Finished difference Result 19719 states and 28141 transitions. [2023-04-03 02:23:10,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:23:10,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-03 02:23:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:10,451 INFO L225 Difference]: With dead ends: 19719 [2023-04-03 02:23:10,452 INFO L226 Difference]: Without dead ends: 9889 [2023-04-03 02:23:10,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:23:10,473 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 269 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:23:10,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 106 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:23:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9889 states. [2023-04-03 02:23:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9889 to 9889. [2023-04-03 02:23:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9889 states, 9885 states have (on average 1.3969650986342943) internal successors, (13809), 9885 states have internal predecessors, (13809), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 13812 transitions. [2023-04-03 02:23:12,087 INFO L78 Accepts]: Start accepts. Automaton has 9889 states and 13812 transitions. Word has length 78 [2023-04-03 02:23:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:12,087 INFO L495 AbstractCegarLoop]: Abstraction has 9889 states and 13812 transitions. [2023-04-03 02:23:12,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 9889 states and 13812 transitions. [2023-04-03 02:23:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:23:12,089 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:12,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:23:12,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:23:12,089 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:12,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:12,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1385675092, now seen corresponding path program 1 times [2023-04-03 02:23:12,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:12,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810504312] [2023-04-03 02:23:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:12,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:23:12,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:12,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810504312] [2023-04-03 02:23:12,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810504312] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:23:12,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832862006] [2023-04-03 02:23:12,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:12,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:23:12,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:23:12,800 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:23:12,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 02:23:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:12,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-03 02:23:12,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:23:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:23:13,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:23:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:23:18,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832862006] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:23:18,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [354127816] [2023-04-03 02:23:18,041 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2023-04-03 02:23:18,042 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:23:18,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:23:18,050 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:23:18,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:23:18,991 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 190 for LOIs [2023-04-03 02:23:21,836 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12