/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:49:08,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:49:08,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:49:08,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:49:08,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:49:08,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:49:08,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:49:08,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:49:08,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:49:08,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:49:08,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:49:08,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:49:08,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:49:08,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:49:08,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:49:08,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:49:08,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:49:08,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:49:08,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:49:08,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:49:08,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:49:08,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:49:08,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:49:08,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:49:08,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:49:08,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:49:08,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:49:08,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:49:08,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:49:08,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:49:08,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:49:08,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:49:08,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:49:08,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:49:08,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:49:08,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:49:08,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:49:08,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:49:08,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:49:08,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:49:08,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:49:08,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:49:08,622 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:49:08,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:49:08,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:49:08,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:49:08,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:49:08,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:49:08,624 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:49:08,624 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:49:08,624 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:49:08,625 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:49:08,625 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:49:08,625 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:49:08,625 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:49:08,626 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:49:08,626 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:49:08,626 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:49:08,626 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:49:08,626 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:49:08,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:49:08,627 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:49:08,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:49:08,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:49:08,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:49:08,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:49:08,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:49:08,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:49:08,627 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:49:08,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:49:08,628 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:49:08,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:49:08,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:49:08,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:49:08,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:49:08,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:49:08,629 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:49:08,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:49:08,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:49:08,629 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:49:08,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:49:08,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:49:08,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:49:08,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:49:08,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:49:08,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:49:08,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:49:08,884 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:49:08,884 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:49:08,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2023-04-03 02:49:10,019 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:49:10,277 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:49:10,279 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2023-04-03 02:49:10,292 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd34a875/6e043d2db6ce4a99843b7d4d47e438e0/FLAG3896c2f92 [2023-04-03 02:49:10,307 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd34a875/6e043d2db6ce4a99843b7d4d47e438e0 [2023-04-03 02:49:10,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:49:10,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:49:10,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:49:10,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:49:10,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:49:10,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2b1fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10, skipping insertion in model container [2023-04-03 02:49:10,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:49:10,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:49:10,620 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.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[11101,11114] [2023-04-03 02:49:10,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:49:10,700 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:49:10,764 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.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[11101,11114] [2023-04-03 02:49:10,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:49:10,831 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:49:10,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10 WrapperNode [2023-04-03 02:49:10,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:49:10,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:49:10,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:49:10,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:49:10,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,951 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:49:10,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:49:10,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:49:10,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:49:10,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10" (1/1) ... [2023-04-03 02:49:10,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:49:10,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:49:10,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:49:11,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:49:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:49:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:49:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:49:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:49:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:49:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:49:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:49:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:49:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:49:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:49:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:49:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:49:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:49:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:49:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:49:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:49:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:49:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:49:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:49:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:49:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:49:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:49:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:49:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:49:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:49:11,161 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:49:11,163 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:49:12,066 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:49:12,308 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:49:12,308 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:49:12,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:49:12 BoogieIcfgContainer [2023-04-03 02:49:12,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:49:12,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:49:12,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:49:12,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:49:12,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:49:10" (1/3) ... [2023-04-03 02:49:12,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d4c3228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:49:12, skipping insertion in model container [2023-04-03 02:49:12,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:10" (2/3) ... [2023-04-03 02:49:12,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d4c3228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:49:12, skipping insertion in model container [2023-04-03 02:49:12,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:49:12" (3/3) ... [2023-04-03 02:49:12,321 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2023-04-03 02:49:12,336 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:49:12,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:49:12,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:49:12,410 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;@1ad2a551, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:49:12,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:49:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 241 states have (on average 1.6016597510373445) internal successors, (386), 272 states have internal predecessors, (386), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:49:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-03 02:49:12,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:12,431 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] [2023-04-03 02:49:12,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:12,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2041148159, now seen corresponding path program 1 times [2023-04-03 02:49:12,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:12,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324515488] [2023-04-03 02:49:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:13,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:13,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324515488] [2023-04-03 02:49:13,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324515488] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:13,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:13,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:49:13,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732460818] [2023-04-03 02:49:13,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:13,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:49:13,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:49:13,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:49:13,055 INFO L87 Difference]: Start difference. First operand has 277 states, 241 states have (on average 1.6016597510373445) internal successors, (386), 272 states have internal predecessors, (386), 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 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:13,241 INFO L93 Difference]: Finished difference Result 491 states and 715 transitions. [2023-04-03 02:49:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:49:13,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 46 [2023-04-03 02:49:13,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:13,251 INFO L225 Difference]: With dead ends: 491 [2023-04-03 02:49:13,251 INFO L226 Difference]: Without dead ends: 243 [2023-04-03 02:49:13,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:49:13,257 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 108 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:13,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 959 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:49:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-03 02:49:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2023-04-03 02:49:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 239 states have (on average 1.4435146443514644) internal successors, (345), 239 states have internal predecessors, (345), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 348 transitions. [2023-04-03 02:49:13,306 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 348 transitions. Word has length 46 [2023-04-03 02:49:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:13,307 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 348 transitions. [2023-04-03 02:49:13,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 348 transitions. [2023-04-03 02:49:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:49:13,309 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:13,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:13,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:49:13,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:13,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:13,311 INFO L85 PathProgramCache]: Analyzing trace with hash 798832077, now seen corresponding path program 1 times [2023-04-03 02:49:13,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:13,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815362208] [2023-04-03 02:49:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:13,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:13,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815362208] [2023-04-03 02:49:13,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815362208] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:13,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:13,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:49:13,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944099983] [2023-04-03 02:49:13,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:13,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:49:13,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:49:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:13,442 INFO L87 Difference]: Start difference. First operand 243 states and 348 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:13,541 INFO L93 Difference]: Finished difference Result 547 states and 807 transitions. [2023-04-03 02:49:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:49:13,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 77 [2023-04-03 02:49:13,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:13,550 INFO L225 Difference]: With dead ends: 547 [2023-04-03 02:49:13,550 INFO L226 Difference]: Without dead ends: 356 [2023-04-03 02:49:13,551 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 [2023-04-03 02:49:13,552 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 220 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:13,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 648 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:49:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-04-03 02:49:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 354. [2023-04-03 02:49:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 350 states have (on average 1.4628571428571429) internal successors, (512), 350 states have internal predecessors, (512), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 515 transitions. [2023-04-03 02:49:13,600 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 515 transitions. Word has length 77 [2023-04-03 02:49:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:13,601 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 515 transitions. [2023-04-03 02:49:13,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 515 transitions. [2023-04-03 02:49:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 02:49:13,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:13,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:13,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:49:13,608 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:13,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1191046741, now seen corresponding path program 1 times [2023-04-03 02:49:13,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:13,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287039362] [2023-04-03 02:49:13,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:13,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:13,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:13,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287039362] [2023-04-03 02:49:13,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287039362] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:13,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:13,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:49:13,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958755218] [2023-04-03 02:49:13,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:13,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:49:13,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:13,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:49:13,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:13,791 INFO L87 Difference]: Start difference. First operand 354 states and 515 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:13,890 INFO L93 Difference]: Finished difference Result 830 states and 1233 transitions. [2023-04-03 02:49:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:49:13,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 83 [2023-04-03 02:49:13,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:13,894 INFO L225 Difference]: With dead ends: 830 [2023-04-03 02:49:13,894 INFO L226 Difference]: Without dead ends: 541 [2023-04-03 02:49:13,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:13,904 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 214 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:13,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 554 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:49:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-04-03 02:49:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 539. [2023-04-03 02:49:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 535 states have (on average 1.4747663551401868) internal successors, (789), 535 states have internal predecessors, (789), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 792 transitions. [2023-04-03 02:49:13,956 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 792 transitions. Word has length 83 [2023-04-03 02:49:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:13,958 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 792 transitions. [2023-04-03 02:49:13,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 792 transitions. [2023-04-03 02:49:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:49:13,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:13,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:13,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:49:13,961 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:13,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:13,962 INFO L85 PathProgramCache]: Analyzing trace with hash -521478519, now seen corresponding path program 1 times [2023-04-03 02:49:13,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:13,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875675044] [2023-04-03 02:49:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:13,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:14,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:14,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875675044] [2023-04-03 02:49:14,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875675044] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:14,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:14,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:49:14,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128855306] [2023-04-03 02:49:14,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:14,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:49:14,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:14,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:49:14,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:14,108 INFO L87 Difference]: Start difference. First operand 539 states and 792 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:14,225 INFO L93 Difference]: Finished difference Result 1298 states and 1932 transitions. [2023-04-03 02:49:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:49:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 89 [2023-04-03 02:49:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:14,231 INFO L225 Difference]: With dead ends: 1298 [2023-04-03 02:49:14,231 INFO L226 Difference]: Without dead ends: 837 [2023-04-03 02:49:14,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:14,241 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 208 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:14,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 539 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:49:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2023-04-03 02:49:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 835. [2023-04-03 02:49:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 831 states have (on average 1.4777376654632972) internal successors, (1228), 831 states have internal predecessors, (1228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1231 transitions. [2023-04-03 02:49:14,336 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1231 transitions. Word has length 89 [2023-04-03 02:49:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:14,336 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1231 transitions. [2023-04-03 02:49:14,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1231 transitions. [2023-04-03 02:49:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-03 02:49:14,339 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:14,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:14,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:49:14,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:14,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1096958742, now seen corresponding path program 1 times [2023-04-03 02:49:14,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:14,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172118390] [2023-04-03 02:49:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:14,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:14,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:14,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172118390] [2023-04-03 02:49:14,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172118390] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:14,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:14,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:49:14,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362120249] [2023-04-03 02:49:14,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:14,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:49:14,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:14,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:49:14,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:14,484 INFO L87 Difference]: Start difference. First operand 835 states and 1231 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:14,671 INFO L93 Difference]: Finished difference Result 2025 states and 3003 transitions. [2023-04-03 02:49:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:49:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 95 [2023-04-03 02:49:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:14,679 INFO L225 Difference]: With dead ends: 2025 [2023-04-03 02:49:14,679 INFO L226 Difference]: Without dead ends: 1281 [2023-04-03 02:49:14,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:14,681 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 202 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:14,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 546 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:49:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2023-04-03 02:49:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1279. [2023-04-03 02:49:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1275 states have (on average 1.4705882352941178) internal successors, (1875), 1275 states have internal predecessors, (1875), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1878 transitions. [2023-04-03 02:49:14,826 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1878 transitions. Word has length 95 [2023-04-03 02:49:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:14,826 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 1878 transitions. [2023-04-03 02:49:14,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1878 transitions. [2023-04-03 02:49:14,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-03 02:49:14,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:14,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:14,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:49:14,830 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:14,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:14,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1229138529, now seen corresponding path program 1 times [2023-04-03 02:49:14,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:14,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056000764] [2023-04-03 02:49:14,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:14,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:14,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:14,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056000764] [2023-04-03 02:49:14,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056000764] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:14,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:14,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:49:14,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197619526] [2023-04-03 02:49:14,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:14,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:49:14,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:14,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:49:14,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:14,952 INFO L87 Difference]: Start difference. First operand 1279 states and 1878 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:15,201 INFO L93 Difference]: Finished difference Result 3048 states and 4470 transitions. [2023-04-03 02:49:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:49:15,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 101 [2023-04-03 02:49:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:15,209 INFO L225 Difference]: With dead ends: 3048 [2023-04-03 02:49:15,210 INFO L226 Difference]: Without dead ends: 1873 [2023-04-03 02:49:15,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:15,213 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 196 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:15,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 509 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:49:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2023-04-03 02:49:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1871. [2023-04-03 02:49:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1867 states have (on average 1.449384038564542) internal successors, (2706), 1867 states have internal predecessors, (2706), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2709 transitions. [2023-04-03 02:49:15,424 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2709 transitions. Word has length 101 [2023-04-03 02:49:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:15,425 INFO L495 AbstractCegarLoop]: Abstraction has 1871 states and 2709 transitions. [2023-04-03 02:49:15,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2709 transitions. [2023-04-03 02:49:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-03 02:49:15,429 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:15,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:15,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:49:15,430 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:15,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash 609607038, now seen corresponding path program 1 times [2023-04-03 02:49:15,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:15,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708459240] [2023-04-03 02:49:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:15,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:15,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:15,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708459240] [2023-04-03 02:49:15,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708459240] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:15,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:15,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:49:15,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872235717] [2023-04-03 02:49:15,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:15,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:49:15,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:15,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:49:15,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:49:15,668 INFO L87 Difference]: Start difference. First operand 1871 states and 2709 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:17,223 INFO L93 Difference]: Finished difference Result 9214 states and 13283 transitions. [2023-04-03 02:49:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:49:17,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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 107 [2023-04-03 02:49:17,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:17,251 INFO L225 Difference]: With dead ends: 9214 [2023-04-03 02:49:17,251 INFO L226 Difference]: Without dead ends: 7441 [2023-04-03 02:49:17,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:49:17,258 INFO L413 NwaCegarLoop]: 744 mSDtfsCounter, 1139 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:17,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 1895 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:49:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7441 states. [2023-04-03 02:49:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7441 to 7433. [2023-04-03 02:49:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7429 states have (on average 1.434782608695652) internal successors, (10659), 7429 states have internal predecessors, (10659), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 10662 transitions. [2023-04-03 02:49:18,485 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 10662 transitions. Word has length 107 [2023-04-03 02:49:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:18,485 INFO L495 AbstractCegarLoop]: Abstraction has 7433 states and 10662 transitions. [2023-04-03 02:49:18,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 10662 transitions. [2023-04-03 02:49:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-03 02:49:18,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:18,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:18,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:49:18,504 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:18,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1805306795, now seen corresponding path program 1 times [2023-04-03 02:49:18,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:18,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260050053] [2023-04-03 02:49:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:18,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:18,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:18,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260050053] [2023-04-03 02:49:18,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260050053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:18,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:18,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:49:18,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528738374] [2023-04-03 02:49:18,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:18,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:49:18,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:18,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:49:18,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:18,637 INFO L87 Difference]: Start difference. First operand 7433 states and 10662 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:20,518 INFO L93 Difference]: Finished difference Result 18034 states and 25826 transitions. [2023-04-03 02:49:20,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:49:20,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 109 [2023-04-03 02:49:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:20,567 INFO L225 Difference]: With dead ends: 18034 [2023-04-03 02:49:20,567 INFO L226 Difference]: Without dead ends: 12831 [2023-04-03 02:49:20,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:20,579 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 224 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:20,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 778 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:49:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12831 states. [2023-04-03 02:49:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12831 to 12829. [2023-04-03 02:49:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12829 states, 12825 states have (on average 1.4234697855750487) internal successors, (18256), 12825 states have internal predecessors, (18256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12829 states to 12829 states and 18259 transitions. [2023-04-03 02:49:22,504 INFO L78 Accepts]: Start accepts. Automaton has 12829 states and 18259 transitions. Word has length 109 [2023-04-03 02:49:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:22,505 INFO L495 AbstractCegarLoop]: Abstraction has 12829 states and 18259 transitions. [2023-04-03 02:49:22,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 12829 states and 18259 transitions. [2023-04-03 02:49:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-03 02:49:22,538 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:22,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:22,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:49:22,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:22,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:22,539 INFO L85 PathProgramCache]: Analyzing trace with hash 19938901, now seen corresponding path program 1 times [2023-04-03 02:49:22,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:22,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145851867] [2023-04-03 02:49:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:22,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:22,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:22,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145851867] [2023-04-03 02:49:22,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145851867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:22,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:22,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:49:22,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981660645] [2023-04-03 02:49:22,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:22,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:49:22,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:22,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:49:22,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:22,670 INFO L87 Difference]: Start difference. First operand 12829 states and 18259 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:24,755 INFO L93 Difference]: Finished difference Result 24117 states and 34233 transitions. [2023-04-03 02:49:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:49:24,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 109 [2023-04-03 02:49:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:24,804 INFO L225 Difference]: With dead ends: 24117 [2023-04-03 02:49:24,805 INFO L226 Difference]: Without dead ends: 19003 [2023-04-03 02:49:24,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:24,823 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 210 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:24,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 793 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:49:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19003 states. [2023-04-03 02:49:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19003 to 19001. [2023-04-03 02:49:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19001 states, 18997 states have (on average 1.4130652208243406) internal successors, (26844), 18997 states have internal predecessors, (26844), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19001 states to 19001 states and 26847 transitions. [2023-04-03 02:49:27,254 INFO L78 Accepts]: Start accepts. Automaton has 19001 states and 26847 transitions. Word has length 109 [2023-04-03 02:49:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:27,254 INFO L495 AbstractCegarLoop]: Abstraction has 19001 states and 26847 transitions. [2023-04-03 02:49:27,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 19001 states and 26847 transitions. [2023-04-03 02:49:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-03 02:49:27,298 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:27,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:27,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:49:27,298 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:27,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1340839847, now seen corresponding path program 1 times [2023-04-03 02:49:27,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:27,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041055996] [2023-04-03 02:49:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:27,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:27,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:27,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041055996] [2023-04-03 02:49:27,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041055996] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:27,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:27,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:49:27,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377806933] [2023-04-03 02:49:27,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:27,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:49:27,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:49:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:27,382 INFO L87 Difference]: Start difference. First operand 19001 states and 26847 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:30,108 INFO L93 Difference]: Finished difference Result 29703 states and 41683 transitions. [2023-04-03 02:49:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:49:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 109 [2023-04-03 02:49:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:30,167 INFO L225 Difference]: With dead ends: 29703 [2023-04-03 02:49:30,167 INFO L226 Difference]: Without dead ends: 24837 [2023-04-03 02:49:30,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:30,185 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 172 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:30,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 803 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:49:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24837 states. [2023-04-03 02:49:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24837 to 24835. [2023-04-03 02:49:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24835 states, 24831 states have (on average 1.3975272844428335) internal successors, (34702), 24831 states have internal predecessors, (34702), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24835 states to 24835 states and 34705 transitions. [2023-04-03 02:49:33,094 INFO L78 Accepts]: Start accepts. Automaton has 24835 states and 34705 transitions. Word has length 109 [2023-04-03 02:49:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:33,094 INFO L495 AbstractCegarLoop]: Abstraction has 24835 states and 34705 transitions. [2023-04-03 02:49:33,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 24835 states and 34705 transitions. [2023-04-03 02:49:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-03 02:49:33,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:33,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:33,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:49:33,143 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:33,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash 806648460, now seen corresponding path program 1 times [2023-04-03 02:49:33,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971050795] [2023-04-03 02:49:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:33,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:33,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971050795] [2023-04-03 02:49:33,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971050795] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:33,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:33,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:49:33,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801164688] [2023-04-03 02:49:33,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:33,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:49:33,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:33,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:49:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:33,241 INFO L87 Difference]: Start difference. First operand 24835 states and 34705 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:37,860 INFO L93 Difference]: Finished difference Result 57820 states and 80100 transitions. [2023-04-03 02:49:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:49:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 109 [2023-04-03 02:49:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:37,947 INFO L225 Difference]: With dead ends: 57820 [2023-04-03 02:49:37,947 INFO L226 Difference]: Without dead ends: 39646 [2023-04-03 02:49:37,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:37,990 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 228 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:37,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 854 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:49:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39646 states. [2023-04-03 02:49:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39646 to 39644. [2023-04-03 02:49:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39644 states, 39640 states have (on average 1.3740413723511604) internal successors, (54467), 39640 states have internal predecessors, (54467), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39644 states to 39644 states and 54470 transitions. [2023-04-03 02:49:42,893 INFO L78 Accepts]: Start accepts. Automaton has 39644 states and 54470 transitions. Word has length 109 [2023-04-03 02:49:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:42,894 INFO L495 AbstractCegarLoop]: Abstraction has 39644 states and 54470 transitions. [2023-04-03 02:49:42,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 39644 states and 54470 transitions. [2023-04-03 02:49:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 02:49:43,146 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:43,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:43,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:49:43,146 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:43,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1905007107, now seen corresponding path program 1 times [2023-04-03 02:49:43,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:43,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130918098] [2023-04-03 02:49:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:43,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:43,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:43,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130918098] [2023-04-03 02:49:43,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130918098] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:43,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:43,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:49:43,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161608123] [2023-04-03 02:49:43,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:43,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:49:43,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:49:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:49:43,318 INFO L87 Difference]: Start difference. First operand 39644 states and 54470 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:50,484 INFO L93 Difference]: Finished difference Result 95339 states and 131384 transitions. [2023-04-03 02:49:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:49:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 111 [2023-04-03 02:49:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:50,603 INFO L225 Difference]: With dead ends: 95339 [2023-04-03 02:49:50,603 INFO L226 Difference]: Without dead ends: 55742 [2023-04-03 02:49:50,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:49:50,674 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 1096 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:50,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 342 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:49:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55742 states. [2023-04-03 02:49:57,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55742 to 55740. [2023-04-03 02:49:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55740 states, 55736 states have (on average 1.3713578297689106) internal successors, (76434), 55736 states have internal predecessors, (76434), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55740 states to 55740 states and 76437 transitions. [2023-04-03 02:49:58,027 INFO L78 Accepts]: Start accepts. Automaton has 55740 states and 76437 transitions. Word has length 111 [2023-04-03 02:49:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:58,028 INFO L495 AbstractCegarLoop]: Abstraction has 55740 states and 76437 transitions. [2023-04-03 02:49:58,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 55740 states and 76437 transitions. [2023-04-03 02:49:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 02:49:58,134 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:58,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:49:58,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:49:58,134 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:58,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:58,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1291316606, now seen corresponding path program 1 times [2023-04-03 02:49:58,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:58,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141271147] [2023-04-03 02:49:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:58,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:58,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:58,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141271147] [2023-04-03 02:49:58,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141271147] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:58,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:58,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:49:58,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101044687] [2023-04-03 02:49:58,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:58,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:49:58,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:58,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:49:58,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:49:58,319 INFO L87 Difference]: Start difference. First operand 55740 states and 76437 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:05,730 INFO L93 Difference]: Finished difference Result 100816 states and 138247 transitions. [2023-04-03 02:50:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 111 [2023-04-03 02:50:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:05,838 INFO L225 Difference]: With dead ends: 100816 [2023-04-03 02:50:05,838 INFO L226 Difference]: Without dead ends: 50666 [2023-04-03 02:50:05,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:05,916 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 144 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:05,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 553 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:50:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50666 states. [2023-04-03 02:50:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50666 to 50664. [2023-04-03 02:50:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50664 states, 50660 states have (on average 1.3550335570469798) internal successors, (68646), 50660 states have internal predecessors, (68646), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50664 states to 50664 states and 68649 transitions. [2023-04-03 02:50:12,697 INFO L78 Accepts]: Start accepts. Automaton has 50664 states and 68649 transitions. Word has length 111 [2023-04-03 02:50:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:12,698 INFO L495 AbstractCegarLoop]: Abstraction has 50664 states and 68649 transitions. [2023-04-03 02:50:12,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 50664 states and 68649 transitions. [2023-04-03 02:50:12,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 02:50:12,754 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:12,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:12,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:50:12,755 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:12,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:12,755 INFO L85 PathProgramCache]: Analyzing trace with hash -833387394, now seen corresponding path program 1 times [2023-04-03 02:50:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:12,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795288196] [2023-04-03 02:50:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:12,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:12,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795288196] [2023-04-03 02:50:12,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795288196] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:12,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:12,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:50:12,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655642532] [2023-04-03 02:50:12,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:12,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:50:12,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:12,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:50:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:12,887 INFO L87 Difference]: Start difference. First operand 50664 states and 68649 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:16,702 INFO L93 Difference]: Finished difference Result 73204 states and 99183 transitions. [2023-04-03 02:50:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:16,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 111 [2023-04-03 02:50:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:16,747 INFO L225 Difference]: With dead ends: 73204 [2023-04-03 02:50:16,747 INFO L226 Difference]: Without dead ends: 25654 [2023-04-03 02:50:16,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:16,803 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 112 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:16,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 536 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:50:16,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25654 states. [2023-04-03 02:50:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25654 to 25652. [2023-04-03 02:50:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25652 states, 25648 states have (on average 1.336634435433562) internal successors, (34282), 25648 states have internal predecessors, (34282), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25652 states to 25652 states and 34285 transitions. [2023-04-03 02:50:20,367 INFO L78 Accepts]: Start accepts. Automaton has 25652 states and 34285 transitions. Word has length 111 [2023-04-03 02:50:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:20,367 INFO L495 AbstractCegarLoop]: Abstraction has 25652 states and 34285 transitions. [2023-04-03 02:50:20,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 25652 states and 34285 transitions. [2023-04-03 02:50:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 02:50:20,386 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:20,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:20,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:50:20,387 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:20,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash 552843589, now seen corresponding path program 1 times [2023-04-03 02:50:20,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:20,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809456952] [2023-04-03 02:50:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:20,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:20,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:20,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809456952] [2023-04-03 02:50:20,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809456952] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:20,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:20,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:50:20,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583347009] [2023-04-03 02:50:20,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:20,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:50:20,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:20,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:50:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:20,529 INFO L87 Difference]: Start difference. First operand 25652 states and 34285 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:22,664 INFO L93 Difference]: Finished difference Result 36924 states and 49367 transitions. [2023-04-03 02:50:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:22,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 111 [2023-04-03 02:50:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:22,690 INFO L225 Difference]: With dead ends: 36924 [2023-04-03 02:50:22,690 INFO L226 Difference]: Without dead ends: 13334 [2023-04-03 02:50:22,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:22,725 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 84 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:22,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 538 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:50:22,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13334 states. [2023-04-03 02:50:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13334 to 13332. [2023-04-03 02:50:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13332 states, 13328 states have (on average 1.3109243697478992) internal successors, (17472), 13328 states have internal predecessors, (17472), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13332 states to 13332 states and 17475 transitions. [2023-04-03 02:50:25,114 INFO L78 Accepts]: Start accepts. Automaton has 13332 states and 17475 transitions. Word has length 111 [2023-04-03 02:50:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:25,114 INFO L495 AbstractCegarLoop]: Abstraction has 13332 states and 17475 transitions. [2023-04-03 02:50:25,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 13332 states and 17475 transitions. [2023-04-03 02:50:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 02:50:25,125 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:25,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:25,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:50:25,125 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:25,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:25,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1351183690, now seen corresponding path program 1 times [2023-04-03 02:50:25,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:25,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845685533] [2023-04-03 02:50:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:25,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:25,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:25,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845685533] [2023-04-03 02:50:25,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845685533] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:25,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:25,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:50:25,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640006900] [2023-04-03 02:50:25,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:25,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:50:25,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:50:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:50:25,939 INFO L87 Difference]: Start difference. First operand 13332 states and 17475 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:29,021 INFO L93 Difference]: Finished difference Result 20221 states and 26543 transitions. [2023-04-03 02:50:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:50:29,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 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 111 [2023-04-03 02:50:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:29,050 INFO L225 Difference]: With dead ends: 20221 [2023-04-03 02:50:29,051 INFO L226 Difference]: Without dead ends: 20219 [2023-04-03 02:50:29,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:50:29,060 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 471 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:29,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1476 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:50:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20219 states. [2023-04-03 02:50:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20219 to 17912. [2023-04-03 02:50:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17912 states, 17908 states have (on average 1.3170649988831806) internal successors, (23586), 17908 states have internal predecessors, (23586), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17912 states to 17912 states and 23589 transitions. [2023-04-03 02:50:31,756 INFO L78 Accepts]: Start accepts. Automaton has 17912 states and 23589 transitions. Word has length 111 [2023-04-03 02:50:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:31,756 INFO L495 AbstractCegarLoop]: Abstraction has 17912 states and 23589 transitions. [2023-04-03 02:50:31,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:31,757 INFO L276 IsEmpty]: Start isEmpty. Operand 17912 states and 23589 transitions. [2023-04-03 02:50:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 02:50:31,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:31,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:31,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:50:31,767 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:31,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:31,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1626109318, now seen corresponding path program 1 times [2023-04-03 02:50:31,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:31,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707308841] [2023-04-03 02:50:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:31,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:31,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:31,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707308841] [2023-04-03 02:50:31,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707308841] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:31,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:31,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:50:31,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358766748] [2023-04-03 02:50:31,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:31,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:50:31,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:31,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:50:31,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:31,894 INFO L87 Difference]: Start difference. First operand 17912 states and 23589 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:33,518 INFO L93 Difference]: Finished difference Result 24602 states and 32458 transitions. [2023-04-03 02:50:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:33,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 111 [2023-04-03 02:50:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:33,529 INFO L225 Difference]: With dead ends: 24602 [2023-04-03 02:50:33,529 INFO L226 Difference]: Without dead ends: 9866 [2023-04-03 02:50:33,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:33,544 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 79 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:33,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 465 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:50:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9866 states. [2023-04-03 02:50:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9866 to 9864. [2023-04-03 02:50:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9864 states, 9860 states have (on average 1.2953346855983774) internal successors, (12772), 9860 states have internal predecessors, (12772), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9864 states to 9864 states and 12775 transitions. [2023-04-03 02:50:35,031 INFO L78 Accepts]: Start accepts. Automaton has 9864 states and 12775 transitions. Word has length 111 [2023-04-03 02:50:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:35,032 INFO L495 AbstractCegarLoop]: Abstraction has 9864 states and 12775 transitions. [2023-04-03 02:50:35,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 9864 states and 12775 transitions. [2023-04-03 02:50:35,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 02:50:35,037 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:35,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:35,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:50:35,037 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:35,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:35,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1719922589, now seen corresponding path program 1 times [2023-04-03 02:50:35,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:35,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987978936] [2023-04-03 02:50:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:35,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:35,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987978936] [2023-04-03 02:50:35,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987978936] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:35,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:35,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:50:35,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133117323] [2023-04-03 02:50:35,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:35,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:50:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:50:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:35,161 INFO L87 Difference]: Start difference. First operand 9864 states and 12775 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:36,058 INFO L93 Difference]: Finished difference Result 12830 states and 16674 transitions. [2023-04-03 02:50:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:50:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 111 [2023-04-03 02:50:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:36,066 INFO L225 Difference]: With dead ends: 12830 [2023-04-03 02:50:36,066 INFO L226 Difference]: Without dead ends: 5275 [2023-04-03 02:50:36,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:50:36,079 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 138 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:36,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 322 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:50:36,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5275 states. [2023-04-03 02:50:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5275 to 4122. [2023-04-03 02:50:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4118 states have (on average 1.2821758135016998) internal successors, (5280), 4118 states have internal predecessors, (5280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 5283 transitions. [2023-04-03 02:50:36,745 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 5283 transitions. Word has length 111 [2023-04-03 02:50:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:36,745 INFO L495 AbstractCegarLoop]: Abstraction has 4122 states and 5283 transitions. [2023-04-03 02:50:36,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 5283 transitions. [2023-04-03 02:50:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-03 02:50:36,748 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:36,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:36,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:50:36,748 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:36,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:36,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2132921177, now seen corresponding path program 1 times [2023-04-03 02:50:36,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:36,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792570962] [2023-04-03 02:50:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:36,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:39,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:39,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792570962] [2023-04-03 02:50:39,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792570962] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:50:39,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589559395] [2023-04-03 02:50:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:39,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:50:39,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:50:39,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:50:39,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:50:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:39,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-03 02:50:39,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:50:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 02:50:42,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:50:42,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589559395] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:42,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:50:42,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [26] total 42 [2023-04-03 02:50:42,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988860501] [2023-04-03 02:50:42,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:42,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:50:42,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:50:42,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722 [2023-04-03 02:50:42,063 INFO L87 Difference]: Start difference. First operand 4122 states and 5283 transitions. Second operand has 18 states, 18 states have (on average 6.5) internal successors, (117), 17 states have internal predecessors, (117), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:44,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:44,709 INFO L93 Difference]: Finished difference Result 9324 states and 11970 transitions. [2023-04-03 02:50:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:50:44,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 17 states have internal predecessors, (117), 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 124 [2023-04-03 02:50:44,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:44,715 INFO L225 Difference]: With dead ends: 9324 [2023-04-03 02:50:44,716 INFO L226 Difference]: Without dead ends: 5256 [2023-04-03 02:50:44,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=276, Invalid=2076, Unknown=0, NotChecked=0, Total=2352 [2023-04-03 02:50:44,721 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 1192 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:44,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 1284 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:50:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2023-04-03 02:50:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 4295. [2023-04-03 02:50:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4291 states have (on average 1.2694010720111861) internal successors, (5447), 4291 states have internal predecessors, (5447), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 5450 transitions. [2023-04-03 02:50:45,560 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 5450 transitions. Word has length 124 [2023-04-03 02:50:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:45,560 INFO L495 AbstractCegarLoop]: Abstraction has 4295 states and 5450 transitions. [2023-04-03 02:50:45,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 17 states have internal predecessors, (117), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 5450 transitions. [2023-04-03 02:50:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-03 02:50:45,563 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:45,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:45,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 02:50:45,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:50:45,764 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:45,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:45,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1286197327, now seen corresponding path program 1 times [2023-04-03 02:50:45,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:45,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206935124] [2023-04-03 02:50:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:45,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-03 02:50:45,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:45,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206935124] [2023-04-03 02:50:45,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206935124] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:45,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:45,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:50:45,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021719602] [2023-04-03 02:50:45,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:45,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:50:45,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:45,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:50:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:50:45,914 INFO L87 Difference]: Start difference. First operand 4295 states and 5450 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:47,020 INFO L93 Difference]: Finished difference Result 9179 states and 11642 transitions. [2023-04-03 02:50:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:50:47,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 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 124 [2023-04-03 02:50:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:47,026 INFO L225 Difference]: With dead ends: 9179 [2023-04-03 02:50:47,026 INFO L226 Difference]: Without dead ends: 5000 [2023-04-03 02:50:47,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:50:47,031 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 610 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:47,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 216 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:50:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2023-04-03 02:50:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4295. [2023-04-03 02:50:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4291 states have (on average 1.2670706129107434) internal successors, (5437), 4291 states have internal predecessors, (5437), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 5440 transitions. [2023-04-03 02:50:47,832 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 5440 transitions. Word has length 124 [2023-04-03 02:50:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:47,832 INFO L495 AbstractCegarLoop]: Abstraction has 4295 states and 5440 transitions. [2023-04-03 02:50:47,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 5440 transitions. [2023-04-03 02:50:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-03 02:50:47,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:47,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:47,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:50:47,835 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:47,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:47,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1786706188, now seen corresponding path program 1 times [2023-04-03 02:50:47,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:47,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462323890] [2023-04-03 02:50:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:47,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:50:48,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:48,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462323890] [2023-04-03 02:50:48,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462323890] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:48,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:48,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:50:48,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57100953] [2023-04-03 02:50:48,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:48,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:50:48,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:50:48,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:50:48,094 INFO L87 Difference]: Start difference. First operand 4295 states and 5440 transitions. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:49,939 INFO L93 Difference]: Finished difference Result 11074 states and 14179 transitions. [2023-04-03 02:50:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:50:49,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 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 124 [2023-04-03 02:50:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:49,948 INFO L225 Difference]: With dead ends: 11074 [2023-04-03 02:50:49,948 INFO L226 Difference]: Without dead ends: 7659 [2023-04-03 02:50:49,952 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 [2023-04-03 02:50:49,953 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 1451 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:49,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1451 Valid, 369 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:50:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7659 states. [2023-04-03 02:50:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7659 to 5968. [2023-04-03 02:50:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5968 states, 5964 states have (on average 1.2580482897384306) internal successors, (7503), 5964 states have internal predecessors, (7503), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 7506 transitions. [2023-04-03 02:50:51,124 INFO L78 Accepts]: Start accepts. Automaton has 5968 states and 7506 transitions. Word has length 124 [2023-04-03 02:50:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:51,124 INFO L495 AbstractCegarLoop]: Abstraction has 5968 states and 7506 transitions. [2023-04-03 02:50:51,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 5968 states and 7506 transitions. [2023-04-03 02:50:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-03 02:50:51,129 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:51,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:51,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:50:51,129 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:51,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1111305177, now seen corresponding path program 1 times [2023-04-03 02:50:51,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:51,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059132182] [2023-04-03 02:50:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:51,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:53,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:53,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059132182] [2023-04-03 02:50:53,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059132182] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:50:53,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248237198] [2023-04-03 02:50:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:53,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:50:53,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:50:53,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:50:53,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:50:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:53,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 108 conjunts are in the unsatisfiable core [2023-04-03 02:50:53,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:50:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:57,588 INFO L327 TraceCheckSpWp]: Computing backward predicates...