/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:36:53,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:36:53,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:36:53,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:36:53,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:36:53,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:36:53,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:36:53,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:36:53,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:36:53,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:36:53,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:36:53,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:36:53,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:36:53,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:36:53,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:36:53,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:36:53,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:36:53,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:36:53,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:36:53,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:36:53,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:36:53,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:36:53,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:36:53,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:36:53,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:36:53,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:36:53,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:36:53,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:36:53,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:36:53,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:36:53,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:36:53,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:36:53,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:36:53,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:36:53,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:36:53,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:36:53,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:36:53,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:36:53,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:36:53,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:36:53,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:36:53,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:36:53,746 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:36:53,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:36:53,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:36:53,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:36:53,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:36:53,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:36:53,747 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:36:53,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:36:53,747 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:36:53,747 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:36:53,748 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:36:53,748 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:36:53,748 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:36:53,748 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:36:53,748 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:36:53,748 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:36:53,748 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:36:53,748 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:36:53,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:36:53,749 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:36:53,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:36:53,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:36:53,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:36:53,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:36:53,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:36:53,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:36:53,750 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:36:53,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:36:53,750 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:36:53,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:36:53,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:36:53,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:36:53,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:36:53,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:36:53,751 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:36:53,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:36:53,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:36:53,751 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:36:53,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:36:53,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:36:53,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:36:53,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:36:53,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:36:53,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:36:53,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:36:53,936 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:36:53,937 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:36:53,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-04-01 12:36:54,887 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:36:55,135 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:36:55,136 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-04-01 12:36:55,142 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01820671/b1f39763798e4925b54e839c96664064/FLAG3a7b56897 [2023-04-01 12:36:55,166 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01820671/b1f39763798e4925b54e839c96664064 [2023-04-01 12:36:55,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:36:55,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:36:55,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:36:55,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:36:55,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:36:55,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30055179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55, skipping insertion in model container [2023-04-01 12:36:55,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:36:55,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:36:55,404 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_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7471,7484] [2023-04-01 12:36:55,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:36:55,465 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:36:55,511 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_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7471,7484] [2023-04-01 12:36:55,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:36:55,557 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:36:55,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55 WrapperNode [2023-04-01 12:36:55,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:36:55,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:36:55,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:36:55,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:36:55,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,613 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:36:55,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:36:55,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:36:55,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:36:55,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55" (1/1) ... [2023-04-01 12:36:55,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:36:55,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:36:55,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:36:55,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:36:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:36:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:36:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:36:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:36:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:36:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:36:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:36:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:36:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:36:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:36:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:36:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:36:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:36:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:36:55,837 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:36:55,839 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:36:56,345 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:36:56,457 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:36:56,457 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:36:56,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:36:56 BoogieIcfgContainer [2023-04-01 12:36:56,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:36:56,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:36:56,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:36:56,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:36:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:36:55" (1/3) ... [2023-04-01 12:36:56,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ac8467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:36:56, skipping insertion in model container [2023-04-01 12:36:56,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:55" (2/3) ... [2023-04-01 12:36:56,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ac8467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:36:56, skipping insertion in model container [2023-04-01 12:36:56,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:36:56" (3/3) ... [2023-04-01 12:36:56,489 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2023-04-01 12:36:56,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:36:56,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:36:56,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:36:56,550 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;@342ac85e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:36:56,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:36:56,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 121 states have (on average 1.677685950413223) internal successors, (203), 122 states have internal predecessors, (203), 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) [2023-04-01 12:36:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 12:36:56,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:56,562 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] [2023-04-01 12:36:56,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:56,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1426761167, now seen corresponding path program 1 times [2023-04-01 12:36:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:56,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20786526] [2023-04-01 12:36:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:36:57,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20786526] [2023-04-01 12:36:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20786526] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:57,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:36:57,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:36:57,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51183424] [2023-04-01 12:36:57,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:57,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:36:57,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:57,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:36:57,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:36:57,063 INFO L87 Difference]: Start difference. First operand has 127 states, 121 states have (on average 1.677685950413223) internal successors, (203), 122 states have internal predecessors, (203), 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 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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) [2023-04-01 12:36:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:57,239 INFO L93 Difference]: Finished difference Result 342 states and 538 transitions. [2023-04-01 12:36:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:36:57,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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 [2023-04-01 12:36:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:57,250 INFO L225 Difference]: With dead ends: 342 [2023-04-01 12:36:57,250 INFO L226 Difference]: Without dead ends: 248 [2023-04-01 12:36:57,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:36:57,255 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 720 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:57,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 447 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:36:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-01 12:36:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2023-04-01 12:36:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 240 states have (on average 1.3708333333333333) internal successors, (329), 240 states have internal predecessors, (329), 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) [2023-04-01 12:36:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 332 transitions. [2023-04-01 12:36:57,309 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 332 transitions. Word has length 47 [2023-04-01 12:36:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:57,310 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 332 transitions. [2023-04-01 12:36:57,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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) [2023-04-01 12:36:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 332 transitions. [2023-04-01 12:36:57,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:36:57,311 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:57,311 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] [2023-04-01 12:36:57,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:36:57,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:57,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1134045138, now seen corresponding path program 1 times [2023-04-01 12:36:57,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:57,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606333348] [2023-04-01 12:36:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:57,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:36:57,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:57,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606333348] [2023-04-01 12:36:57,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606333348] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:57,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:36:57,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:36:57,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570583507] [2023-04-01 12:36:57,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:57,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:36:57,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:57,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:36:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:36:57,470 INFO L87 Difference]: Start difference. First operand 244 states and 332 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-04-01 12:36:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:57,684 INFO L93 Difference]: Finished difference Result 525 states and 732 transitions. [2023-04-01 12:36:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:36:57,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 48 [2023-04-01 12:36:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:57,689 INFO L225 Difference]: With dead ends: 525 [2023-04-01 12:36:57,689 INFO L226 Difference]: Without dead ends: 348 [2023-04-01 12:36:57,698 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 [2023-04-01 12:36:57,699 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 392 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:57,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 193 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:36:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-04-01 12:36:57,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 346. [2023-04-01 12:36:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 342 states have (on average 1.3888888888888888) internal successors, (475), 342 states have internal predecessors, (475), 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) [2023-04-01 12:36:57,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 478 transitions. [2023-04-01 12:36:57,754 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 478 transitions. Word has length 48 [2023-04-01 12:36:57,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:57,754 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 478 transitions. [2023-04-01 12:36:57,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-04-01 12:36:57,754 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 478 transitions. [2023-04-01 12:36:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:36:57,760 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:57,760 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] [2023-04-01 12:36:57,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:36:57,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:57,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2065743043, now seen corresponding path program 1 times [2023-04-01 12:36:57,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:57,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305203190] [2023-04-01 12:36:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:57,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:36:57,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:57,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305203190] [2023-04-01 12:36:57,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305203190] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:57,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:36:57,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:36:57,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175041356] [2023-04-01 12:36:57,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:57,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:36:57,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:36:57,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:36:57,870 INFO L87 Difference]: Start difference. First operand 346 states and 478 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-04-01 12:36:58,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:58,041 INFO L93 Difference]: Finished difference Result 851 states and 1200 transitions. [2023-04-01 12:36:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:36:58,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 48 [2023-04-01 12:36:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:58,044 INFO L225 Difference]: With dead ends: 851 [2023-04-01 12:36:58,044 INFO L226 Difference]: Without dead ends: 552 [2023-04-01 12:36:58,045 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 [2023-04-01 12:36:58,046 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 397 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:58,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 185 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:36:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-04-01 12:36:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 550. [2023-04-01 12:36:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 546 states have (on average 1.401098901098901) internal successors, (765), 546 states have internal predecessors, (765), 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) [2023-04-01 12:36:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 768 transitions. [2023-04-01 12:36:58,110 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 768 transitions. Word has length 48 [2023-04-01 12:36:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:58,110 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 768 transitions. [2023-04-01 12:36:58,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-04-01 12:36:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 768 transitions. [2023-04-01 12:36:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:36:58,111 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:58,111 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] [2023-04-01 12:36:58,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:36:58,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:58,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:58,112 INFO L85 PathProgramCache]: Analyzing trace with hash -681728588, now seen corresponding path program 1 times [2023-04-01 12:36:58,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:58,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769503521] [2023-04-01 12:36:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:58,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:36:58,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:58,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769503521] [2023-04-01 12:36:58,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769503521] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:58,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:36:58,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:36:58,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239920523] [2023-04-01 12:36:58,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:58,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:36:58,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:36:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:36:58,228 INFO L87 Difference]: Start difference. First operand 550 states and 768 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-04-01 12:36:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:58,441 INFO L93 Difference]: Finished difference Result 1363 states and 1924 transitions. [2023-04-01 12:36:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:36:58,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 48 [2023-04-01 12:36:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:58,444 INFO L225 Difference]: With dead ends: 1363 [2023-04-01 12:36:58,444 INFO L226 Difference]: Without dead ends: 844 [2023-04-01 12:36:58,445 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 [2023-04-01 12:36:58,446 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 406 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:58,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 174 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:36:58,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2023-04-01 12:36:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 842. [2023-04-01 12:36:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 838 states have (on average 1.3949880668257757) internal successors, (1169), 838 states have internal predecessors, (1169), 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) [2023-04-01 12:36:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1172 transitions. [2023-04-01 12:36:58,536 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1172 transitions. Word has length 48 [2023-04-01 12:36:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:58,536 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1172 transitions. [2023-04-01 12:36:58,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-04-01 12:36:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1172 transitions. [2023-04-01 12:36:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 12:36:58,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:58,537 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] [2023-04-01 12:36:58,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:36:58,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:58,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:58,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1636516986, now seen corresponding path program 1 times [2023-04-01 12:36:58,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:58,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177975506] [2023-04-01 12:36:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:58,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:36:58,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:58,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177975506] [2023-04-01 12:36:58,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177975506] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:58,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:36:58,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-04-01 12:36:58,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005142156] [2023-04-01 12:36:58,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:58,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 12:36:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 12:36:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:36:58,997 INFO L87 Difference]: Start difference. First operand 842 states and 1172 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 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) [2023-04-01 12:36:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:59,809 INFO L93 Difference]: Finished difference Result 1876 states and 2625 transitions. [2023-04-01 12:36:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 12:36:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 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 49 [2023-04-01 12:36:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:59,814 INFO L225 Difference]: With dead ends: 1876 [2023-04-01 12:36:59,814 INFO L226 Difference]: Without dead ends: 1714 [2023-04-01 12:36:59,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:36:59,815 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1822 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:59,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1822 Valid, 787 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 12:36:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2023-04-01 12:36:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1266. [2023-04-01 12:36:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1262 states have (on average 1.386687797147385) internal successors, (1750), 1262 states have internal predecessors, (1750), 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) [2023-04-01 12:36:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1753 transitions. [2023-04-01 12:36:59,942 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1753 transitions. Word has length 49 [2023-04-01 12:36:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:59,943 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 1753 transitions. [2023-04-01 12:36:59,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 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) [2023-04-01 12:36:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1753 transitions. [2023-04-01 12:36:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 12:36:59,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:59,943 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] [2023-04-01 12:36:59,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:36:59,944 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:59,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:59,944 INFO L85 PathProgramCache]: Analyzing trace with hash -36456666, now seen corresponding path program 1 times [2023-04-01 12:36:59,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:59,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784546559] [2023-04-01 12:36:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:59,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:00,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:00,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784546559] [2023-04-01 12:37:00,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784546559] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:00,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:00,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 12:37:00,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320259056] [2023-04-01 12:37:00,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:00,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 12:37:00,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 12:37:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:37:00,266 INFO L87 Difference]: Start difference. First operand 1266 states and 1753 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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) [2023-04-01 12:37:00,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:00,881 INFO L93 Difference]: Finished difference Result 3042 states and 4271 transitions. [2023-04-01 12:37:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 12:37:00,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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 [2023-04-01 12:37:00,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:00,890 INFO L225 Difference]: With dead ends: 3042 [2023-04-01 12:37:00,891 INFO L226 Difference]: Without dead ends: 2566 [2023-04-01 12:37:00,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:37:00,893 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 1368 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:00,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1368 Valid, 695 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:37:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2023-04-01 12:37:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1847. [2023-04-01 12:37:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1843 states have (on average 1.3749321758003255) internal successors, (2534), 1843 states have internal predecessors, (2534), 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) [2023-04-01 12:37:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2537 transitions. [2023-04-01 12:37:01,125 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2537 transitions. Word has length 49 [2023-04-01 12:37:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:01,125 INFO L495 AbstractCegarLoop]: Abstraction has 1847 states and 2537 transitions. [2023-04-01 12:37:01,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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) [2023-04-01 12:37:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2537 transitions. [2023-04-01 12:37:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 12:37:01,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:01,126 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] [2023-04-01 12:37:01,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:37:01,126 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:01,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:01,126 INFO L85 PathProgramCache]: Analyzing trace with hash 324170438, now seen corresponding path program 1 times [2023-04-01 12:37:01,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:01,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194291941] [2023-04-01 12:37:01,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:01,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:01,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:01,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194291941] [2023-04-01 12:37:01,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194291941] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:01,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:01,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:37:01,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764978201] [2023-04-01 12:37:01,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:01,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:37:01,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:37:01,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:37:01,478 INFO L87 Difference]: Start difference. First operand 1847 states and 2537 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2023-04-01 12:37:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:02,611 INFO L93 Difference]: Finished difference Result 6892 states and 9718 transitions. [2023-04-01 12:37:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 12:37:02,612 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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 [2023-04-01 12:37:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:02,629 INFO L225 Difference]: With dead ends: 6892 [2023-04-01 12:37:02,629 INFO L226 Difference]: Without dead ends: 6194 [2023-04-01 12:37:02,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:37:02,631 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1373 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:02,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 1235 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:37:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2023-04-01 12:37:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 3492. [2023-04-01 12:37:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3488 states have (on average 1.382454128440367) internal successors, (4822), 3488 states have internal predecessors, (4822), 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) [2023-04-01 12:37:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 4825 transitions. [2023-04-01 12:37:03,121 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 4825 transitions. Word has length 49 [2023-04-01 12:37:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:03,121 INFO L495 AbstractCegarLoop]: Abstraction has 3492 states and 4825 transitions. [2023-04-01 12:37:03,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2023-04-01 12:37:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 4825 transitions. [2023-04-01 12:37:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:37:03,122 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:03,122 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] [2023-04-01 12:37:03,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:37:03,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:03,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1288720581, now seen corresponding path program 1 times [2023-04-01 12:37:03,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:03,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503218469] [2023-04-01 12:37:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:03,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:03,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:03,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503218469] [2023-04-01 12:37:03,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503218469] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:03,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:03,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:37:03,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220615507] [2023-04-01 12:37:03,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:03,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:37:03,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:03,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:37:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:37:03,496 INFO L87 Difference]: Start difference. First operand 3492 states and 4825 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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) [2023-04-01 12:37:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:04,650 INFO L93 Difference]: Finished difference Result 7777 states and 10795 transitions. [2023-04-01 12:37:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 12:37:04,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 [2023-04-01 12:37:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:04,668 INFO L225 Difference]: With dead ends: 7777 [2023-04-01 12:37:04,668 INFO L226 Difference]: Without dead ends: 7623 [2023-04-01 12:37:04,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:37:04,670 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 701 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:04,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1053 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:37:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7623 states. [2023-04-01 12:37:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7623 to 3510. [2023-04-01 12:37:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 3506 states have (on average 1.3804905875641758) internal successors, (4840), 3506 states have internal predecessors, (4840), 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) [2023-04-01 12:37:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 4843 transitions. [2023-04-01 12:37:05,282 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 4843 transitions. Word has length 51 [2023-04-01 12:37:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:05,283 INFO L495 AbstractCegarLoop]: Abstraction has 3510 states and 4843 transitions. [2023-04-01 12:37:05,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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) [2023-04-01 12:37:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 4843 transitions. [2023-04-01 12:37:05,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:37:05,283 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:05,283 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] [2023-04-01 12:37:05,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:37:05,284 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:05,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:05,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1676542683, now seen corresponding path program 1 times [2023-04-01 12:37:05,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:05,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966965098] [2023-04-01 12:37:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:05,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:05,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:05,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966965098] [2023-04-01 12:37:05,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966965098] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:05,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:05,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:37:05,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070396447] [2023-04-01 12:37:05,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:05,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:37:05,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:37:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:37:05,661 INFO L87 Difference]: Start difference. First operand 3510 states and 4843 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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) [2023-04-01 12:37:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:06,779 INFO L93 Difference]: Finished difference Result 6600 states and 9156 transitions. [2023-04-01 12:37:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 12:37:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 [2023-04-01 12:37:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:06,798 INFO L225 Difference]: With dead ends: 6600 [2023-04-01 12:37:06,798 INFO L226 Difference]: Without dead ends: 5902 [2023-04-01 12:37:06,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:37:06,802 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 384 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:06,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 945 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:37:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5902 states. [2023-04-01 12:37:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5902 to 3522. [2023-04-01 12:37:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3518 states have (on average 1.3791927231381467) internal successors, (4852), 3518 states have internal predecessors, (4852), 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) [2023-04-01 12:37:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 4855 transitions. [2023-04-01 12:37:07,306 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 4855 transitions. Word has length 51 [2023-04-01 12:37:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:07,306 INFO L495 AbstractCegarLoop]: Abstraction has 3522 states and 4855 transitions. [2023-04-01 12:37:07,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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) [2023-04-01 12:37:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 4855 transitions. [2023-04-01 12:37:07,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:37:07,307 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:07,307 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] [2023-04-01 12:37:07,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:37:07,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:07,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1018364293, now seen corresponding path program 1 times [2023-04-01 12:37:07,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:07,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688110507] [2023-04-01 12:37:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:07,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688110507] [2023-04-01 12:37:07,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688110507] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:07,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:07,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:37:07,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397042877] [2023-04-01 12:37:07,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:07,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:37:07,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:37:07,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:37:07,666 INFO L87 Difference]: Start difference. First operand 3522 states and 4855 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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) [2023-04-01 12:37:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:09,112 INFO L93 Difference]: Finished difference Result 8190 states and 11356 transitions. [2023-04-01 12:37:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:37:09,112 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 [2023-04-01 12:37:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:09,133 INFO L225 Difference]: With dead ends: 8190 [2023-04-01 12:37:09,134 INFO L226 Difference]: Without dead ends: 7264 [2023-04-01 12:37:09,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:37:09,138 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 497 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:09,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 1491 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:37:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7264 states. [2023-04-01 12:37:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7264 to 4858. [2023-04-01 12:37:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4858 states, 4854 states have (on average 1.3842192006592502) internal successors, (6719), 4854 states have internal predecessors, (6719), 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) [2023-04-01 12:37:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4858 states to 4858 states and 6722 transitions. [2023-04-01 12:37:09,865 INFO L78 Accepts]: Start accepts. Automaton has 4858 states and 6722 transitions. Word has length 51 [2023-04-01 12:37:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:09,865 INFO L495 AbstractCegarLoop]: Abstraction has 4858 states and 6722 transitions. [2023-04-01 12:37:09,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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) [2023-04-01 12:37:09,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4858 states and 6722 transitions. [2023-04-01 12:37:09,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 12:37:09,866 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:09,866 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] [2023-04-01 12:37:09,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:37:09,866 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:09,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash 883800634, now seen corresponding path program 1 times [2023-04-01 12:37:09,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:09,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474337918] [2023-04-01 12:37:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:09,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:09,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:09,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474337918] [2023-04-01 12:37:09,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474337918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:09,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:09,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:37:09,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079754848] [2023-04-01 12:37:09,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:09,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:37:09,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:09,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:37:09,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:37:09,899 INFO L87 Difference]: Start difference. First operand 4858 states and 6722 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-04-01 12:37:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:10,535 INFO L93 Difference]: Finished difference Result 8819 states and 12260 transitions. [2023-04-01 12:37:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:37:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2023-04-01 12:37:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:10,544 INFO L225 Difference]: With dead ends: 8819 [2023-04-01 12:37:10,544 INFO L226 Difference]: Without dead ends: 4769 [2023-04-01 12:37:10,551 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 [2023-04-01 12:37:10,552 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 84 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:10,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 280 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:37:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2023-04-01 12:37:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 4647. [2023-04-01 12:37:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4647 states, 4643 states have (on average 1.3822959293560197) internal successors, (6418), 4643 states have internal predecessors, (6418), 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) [2023-04-01 12:37:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 6421 transitions. [2023-04-01 12:37:11,172 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 6421 transitions. Word has length 52 [2023-04-01 12:37:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:11,172 INFO L495 AbstractCegarLoop]: Abstraction has 4647 states and 6421 transitions. [2023-04-01 12:37:11,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-04-01 12:37:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 6421 transitions. [2023-04-01 12:37:11,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 12:37:11,173 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:11,173 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] [2023-04-01 12:37:11,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:37:11,173 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:11,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:11,173 INFO L85 PathProgramCache]: Analyzing trace with hash 681462839, now seen corresponding path program 1 times [2023-04-01 12:37:11,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:11,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854186015] [2023-04-01 12:37:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:11,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:11,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854186015] [2023-04-01 12:37:11,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854186015] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:11,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:11,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:37:11,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798434230] [2023-04-01 12:37:11,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:11,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:37:11,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:11,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:37:11,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:37:11,203 INFO L87 Difference]: Start difference. First operand 4647 states and 6421 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-04-01 12:37:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:11,811 INFO L93 Difference]: Finished difference Result 8158 states and 11331 transitions. [2023-04-01 12:37:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:37:11,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2023-04-01 12:37:11,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:11,818 INFO L225 Difference]: With dead ends: 8158 [2023-04-01 12:37:11,818 INFO L226 Difference]: Without dead ends: 4225 [2023-04-01 12:37:11,824 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 [2023-04-01 12:37:11,825 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 83 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:11,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 272 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:37:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2023-04-01 12:37:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 4221. [2023-04-01 12:37:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4217 states have (on average 1.3784681052881196) internal successors, (5813), 4217 states have internal predecessors, (5813), 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) [2023-04-01 12:37:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 5816 transitions. [2023-04-01 12:37:12,404 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 5816 transitions. Word has length 52 [2023-04-01 12:37:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:12,404 INFO L495 AbstractCegarLoop]: Abstraction has 4221 states and 5816 transitions. [2023-04-01 12:37:12,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-04-01 12:37:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 5816 transitions. [2023-04-01 12:37:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 12:37:12,405 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:12,405 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] [2023-04-01 12:37:12,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:37:12,406 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:12,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:12,406 INFO L85 PathProgramCache]: Analyzing trace with hash -9145008, now seen corresponding path program 1 times [2023-04-01 12:37:12,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:12,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301798056] [2023-04-01 12:37:12,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:12,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:15,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:15,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301798056] [2023-04-01 12:37:15,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301798056] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:15,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:15,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-01 12:37:15,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283286036] [2023-04-01 12:37:15,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:15,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 12:37:15,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 12:37:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-04-01 12:37:15,597 INFO L87 Difference]: Start difference. First operand 4221 states and 5816 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 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) [2023-04-01 12:37:22,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:22,309 INFO L93 Difference]: Finished difference Result 6276 states and 8646 transitions. [2023-04-01 12:37:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-01 12:37:22,310 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 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 53 [2023-04-01 12:37:22,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:22,322 INFO L225 Difference]: With dead ends: 6276 [2023-04-01 12:37:22,323 INFO L226 Difference]: Without dead ends: 5523 [2023-04-01 12:37:22,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 12:37:22,325 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 403 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:22,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 1111 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 12:37:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2023-04-01 12:37:22,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 4199. [2023-04-01 12:37:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4199 states, 4195 states have (on average 1.3797377830750894) internal successors, (5788), 4195 states have internal predecessors, (5788), 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) [2023-04-01 12:37:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 5791 transitions. [2023-04-01 12:37:22,898 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 5791 transitions. Word has length 53 [2023-04-01 12:37:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:22,898 INFO L495 AbstractCegarLoop]: Abstraction has 4199 states and 5791 transitions. [2023-04-01 12:37:22,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 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) [2023-04-01 12:37:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 5791 transitions. [2023-04-01 12:37:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:37:22,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:22,899 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] [2023-04-01 12:37:22,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:37:22,900 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:22,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1225332590, now seen corresponding path program 1 times [2023-04-01 12:37:22,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:22,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599394799] [2023-04-01 12:37:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:22,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:22,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599394799] [2023-04-01 12:37:22,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599394799] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:22,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:22,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:37:22,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657952101] [2023-04-01 12:37:22,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:22,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:37:22,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:37:22,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:37:22,999 INFO L87 Difference]: Start difference. First operand 4199 states and 5791 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-04-01 12:37:23,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:23,895 INFO L93 Difference]: Finished difference Result 8070 states and 11187 transitions. [2023-04-01 12:37:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:37:23,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 59 [2023-04-01 12:37:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:23,904 INFO L225 Difference]: With dead ends: 8070 [2023-04-01 12:37:23,904 INFO L226 Difference]: Without dead ends: 5124 [2023-04-01 12:37:23,908 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 [2023-04-01 12:37:23,909 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 83 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:23,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 301 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:37:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5124 states. [2023-04-01 12:37:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5124 to 4780. [2023-04-01 12:37:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4776 states have (on average 1.3714405360134003) internal successors, (6550), 4776 states have internal predecessors, (6550), 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) [2023-04-01 12:37:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 6553 transitions. [2023-04-01 12:37:24,596 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 6553 transitions. Word has length 59 [2023-04-01 12:37:24,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:24,596 INFO L495 AbstractCegarLoop]: Abstraction has 4780 states and 6553 transitions. [2023-04-01 12:37:24,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-04-01 12:37:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 6553 transitions. [2023-04-01 12:37:24,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:37:24,597 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:24,597 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] [2023-04-01 12:37:24,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:37:24,597 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:24,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1682863858, now seen corresponding path program 1 times [2023-04-01 12:37:24,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:24,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538551513] [2023-04-01 12:37:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:24,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:24,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:24,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538551513] [2023-04-01 12:37:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538551513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:24,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:24,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:37:24,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56642984] [2023-04-01 12:37:24,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:24,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:37:24,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:37:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:37:24,662 INFO L87 Difference]: Start difference. First operand 4780 states and 6553 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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) [2023-04-01 12:37:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:25,535 INFO L93 Difference]: Finished difference Result 9669 states and 13287 transitions. [2023-04-01 12:37:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:37:25,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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 [2023-04-01 12:37:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:25,545 INFO L225 Difference]: With dead ends: 9669 [2023-04-01 12:37:25,545 INFO L226 Difference]: Without dead ends: 6143 [2023-04-01 12:37:25,550 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 [2023-04-01 12:37:25,550 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 79 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:25,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 283 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:37:25,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6143 states. [2023-04-01 12:37:26,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6143 to 5590. [2023-04-01 12:37:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 5586 states have (on average 1.3582169709989258) internal successors, (7587), 5586 states have internal predecessors, (7587), 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) [2023-04-01 12:37:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 7590 transitions. [2023-04-01 12:37:26,356 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 7590 transitions. Word has length 62 [2023-04-01 12:37:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:26,356 INFO L495 AbstractCegarLoop]: Abstraction has 5590 states and 7590 transitions. [2023-04-01 12:37:26,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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) [2023-04-01 12:37:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 7590 transitions. [2023-04-01 12:37:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 12:37:26,357 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:26,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:37:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:37:26,357 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:26,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash -785088321, now seen corresponding path program 1 times [2023-04-01 12:37:26,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:26,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078791386] [2023-04-01 12:37:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:26,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:26,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:26,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078791386] [2023-04-01 12:37:26,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078791386] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:26,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:26,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:37:26,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512995541] [2023-04-01 12:37:26,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:26,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:37:26,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:37:26,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:37:26,429 INFO L87 Difference]: Start difference. First operand 5590 states and 7590 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-04-01 12:37:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:27,500 INFO L93 Difference]: Finished difference Result 12393 states and 16886 transitions. [2023-04-01 12:37:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:37:27,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 65 [2023-04-01 12:37:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:27,509 INFO L225 Difference]: With dead ends: 12393 [2023-04-01 12:37:27,509 INFO L226 Difference]: Without dead ends: 7055 [2023-04-01 12:37:27,516 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 [2023-04-01 12:37:27,516 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 74 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:27,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 264 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:37:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7055 states. [2023-04-01 12:37:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7055 to 6509. [2023-04-01 12:37:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6505 states have (on average 1.348347425057648) internal successors, (8771), 6505 states have internal predecessors, (8771), 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) [2023-04-01 12:37:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 8774 transitions. [2023-04-01 12:37:28,516 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 8774 transitions. Word has length 65 [2023-04-01 12:37:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:28,516 INFO L495 AbstractCegarLoop]: Abstraction has 6509 states and 8774 transitions. [2023-04-01 12:37:28,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-04-01 12:37:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 8774 transitions. [2023-04-01 12:37:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 12:37:28,518 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:28,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:37:28,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:37:28,519 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:28,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:28,519 INFO L85 PathProgramCache]: Analyzing trace with hash 202911647, now seen corresponding path program 1 times [2023-04-01 12:37:28,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:28,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615452585] [2023-04-01 12:37:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:28,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:28,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615452585] [2023-04-01 12:37:28,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615452585] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:28,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:28,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:37:28,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391630320] [2023-04-01 12:37:28,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:28,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:37:28,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:28,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:37:28,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:37:28,721 INFO L87 Difference]: Start difference. First operand 6509 states and 8774 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2023-04-01 12:37:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:30,153 INFO L93 Difference]: Finished difference Result 8720 states and 11700 transitions. [2023-04-01 12:37:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:37:30,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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 70 [2023-04-01 12:37:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:30,163 INFO L225 Difference]: With dead ends: 8720 [2023-04-01 12:37:30,163 INFO L226 Difference]: Without dead ends: 8718 [2023-04-01 12:37:30,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:37:30,165 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 324 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:30,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 755 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:37:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8718 states. [2023-04-01 12:37:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8718 to 7785. [2023-04-01 12:37:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7785 states, 7781 states have (on average 1.345456882148824) internal successors, (10469), 7781 states have internal predecessors, (10469), 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) [2023-04-01 12:37:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7785 states to 7785 states and 10472 transitions. [2023-04-01 12:37:31,408 INFO L78 Accepts]: Start accepts. Automaton has 7785 states and 10472 transitions. Word has length 70 [2023-04-01 12:37:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:31,408 INFO L495 AbstractCegarLoop]: Abstraction has 7785 states and 10472 transitions. [2023-04-01 12:37:31,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2023-04-01 12:37:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 7785 states and 10472 transitions. [2023-04-01 12:37:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 12:37:31,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:31,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:37:31,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:37:31,410 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:31,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash -348210821, now seen corresponding path program 1 times [2023-04-01 12:37:31,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:31,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695724465] [2023-04-01 12:37:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:31,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:31,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:31,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695724465] [2023-04-01 12:37:31,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695724465] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:37:31,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696177178] [2023-04-01 12:37:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:31,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:37:31,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:37:31,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:37:31,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:37:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:32,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 12:37:32,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:37:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 12:37:33,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:37:33,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696177178] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:33,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:37:33,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [14] total 28 [2023-04-01 12:37:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436078659] [2023-04-01 12:37:33,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:33,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:37:33,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:37:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2023-04-01 12:37:33,044 INFO L87 Difference]: Start difference. First operand 7785 states and 10472 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 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) [2023-04-01 12:37:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:34,931 INFO L93 Difference]: Finished difference Result 9667 states and 13018 transitions. [2023-04-01 12:37:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 12:37:34,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 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 80 [2023-04-01 12:37:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:34,939 INFO L225 Difference]: With dead ends: 9667 [2023-04-01 12:37:34,939 INFO L226 Difference]: Without dead ends: 8060 [2023-04-01 12:37:34,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-04-01 12:37:34,942 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 389 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:34,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 820 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:37:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2023-04-01 12:37:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 8050. [2023-04-01 12:37:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8050 states, 8046 states have (on average 1.3462590106885408) internal successors, (10832), 8046 states have internal predecessors, (10832), 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) [2023-04-01 12:37:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8050 states to 8050 states and 10835 transitions. [2023-04-01 12:37:36,242 INFO L78 Accepts]: Start accepts. Automaton has 8050 states and 10835 transitions. Word has length 80 [2023-04-01 12:37:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:36,243 INFO L495 AbstractCegarLoop]: Abstraction has 8050 states and 10835 transitions. [2023-04-01 12:37:36,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 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) [2023-04-01 12:37:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8050 states and 10835 transitions. [2023-04-01 12:37:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 12:37:36,245 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:36,245 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:37:36,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 12:37:36,451 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,SelfDestructingSolverStorable17 [2023-04-01 12:37:36,451 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:36,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1077256100, now seen corresponding path program 1 times [2023-04-01 12:37:36,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:36,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327794806] [2023-04-01 12:37:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:36,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 12:37:36,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:36,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327794806] [2023-04-01 12:37:36,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327794806] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:36,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:36,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:37:36,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622424143] [2023-04-01 12:37:36,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:36,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:37:36,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:37:36,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:37:36,600 INFO L87 Difference]: Start difference. First operand 8050 states and 10835 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 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) [2023-04-01 12:37:39,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:39,642 INFO L93 Difference]: Finished difference Result 22831 states and 30771 transitions. [2023-04-01 12:37:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 12:37:39,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 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 80 [2023-04-01 12:37:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:39,669 INFO L225 Difference]: With dead ends: 22831 [2023-04-01 12:37:39,670 INFO L226 Difference]: Without dead ends: 15927 [2023-04-01 12:37:39,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:37:39,701 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 884 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:39,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 315 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:37:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15927 states. [2023-04-01 12:37:42,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15927 to 13095. [2023-04-01 12:37:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13095 states, 13091 states have (on average 1.3133450462149567) internal successors, (17193), 13091 states have internal predecessors, (17193), 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) [2023-04-01 12:37:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13095 states to 13095 states and 17196 transitions. [2023-04-01 12:37:42,082 INFO L78 Accepts]: Start accepts. Automaton has 13095 states and 17196 transitions. Word has length 80 [2023-04-01 12:37:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:42,082 INFO L495 AbstractCegarLoop]: Abstraction has 13095 states and 17196 transitions. [2023-04-01 12:37:42,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 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) [2023-04-01 12:37:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 13095 states and 17196 transitions. [2023-04-01 12:37:42,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 12:37:42,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:42,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:37:42,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 12:37:42,086 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:42,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1199768159, now seen corresponding path program 1 times [2023-04-01 12:37:42,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:42,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748053918] [2023-04-01 12:37:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:42,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 12:37:42,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:42,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748053918] [2023-04-01 12:37:42,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748053918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:42,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:42,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 12:37:42,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321882248] [2023-04-01 12:37:42,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:37:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:37:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:37:42,580 INFO L87 Difference]: Start difference. First operand 13095 states and 17196 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 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) [2023-04-01 12:37:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:47,281 INFO L93 Difference]: Finished difference Result 20755 states and 27414 transitions. [2023-04-01 12:37:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 12:37:47,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 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 80 [2023-04-01 12:37:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:47,305 INFO L225 Difference]: With dead ends: 20755 [2023-04-01 12:37:47,306 INFO L226 Difference]: Without dead ends: 17115 [2023-04-01 12:37:47,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:37:47,313 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 669 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:47,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 982 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:37:47,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17115 states. [2023-04-01 12:37:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17115 to 13326. [2023-04-01 12:37:50,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 13322 states have (on average 1.314517339738778) internal successors, (17512), 13322 states have internal predecessors, (17512), 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) [2023-04-01 12:37:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 17515 transitions. [2023-04-01 12:37:50,098 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 17515 transitions. Word has length 80 [2023-04-01 12:37:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:50,098 INFO L495 AbstractCegarLoop]: Abstraction has 13326 states and 17515 transitions. [2023-04-01 12:37:50,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 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) [2023-04-01 12:37:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 17515 transitions. [2023-04-01 12:37:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 12:37:50,100 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:50,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:37:50,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 12:37:50,101 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:50,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:50,101 INFO L85 PathProgramCache]: Analyzing trace with hash 468103460, now seen corresponding path program 1 times [2023-04-01 12:37:50,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:50,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677475142] [2023-04-01 12:37:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:50,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 12:37:50,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:50,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677475142] [2023-04-01 12:37:50,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677475142] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:50,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:50,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:37:50,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201941186] [2023-04-01 12:37:50,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:50,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:37:50,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:37:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:37:50,274 INFO L87 Difference]: Start difference. First operand 13326 states and 17515 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 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)