/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.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:50:17,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:50:17,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:50:17,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:50:17,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:50:17,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:50:17,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:50:17,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:50:17,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:50:17,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:50:17,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:50:17,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:50:17,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:50:17,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:50:17,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:50:17,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:50:17,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:50:17,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:50:17,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:50:17,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:50:17,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:50:17,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:50:17,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:50:17,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:50:17,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:50:17,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:50:17,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:50:17,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:50:17,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:50:17,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2023-04-03 02:50:17,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:50:17,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:50:17,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:50:17,688 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 02:50:17,702 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:50:17,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:50:17,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:50:17,703 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:50:17,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:50:17,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:50:17,704 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:50:17,704 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:50:17,704 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:50:17,704 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:50:17,704 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:50:17,704 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:50:17,704 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:50:17,704 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:50:17,704 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:50:17,705 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:50:17,705 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:50:17,705 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:50:17,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:50:17,705 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:50:17,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:50:17,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:50:17,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:50:17,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:50:17,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:50:17,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:50:17,706 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:50:17,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:50:17,706 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:50:17,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:50:17,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:50:17,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:50:17,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:50:17,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:50:17,706 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:50:17,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:50:17,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:50:17,707 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:50:17,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:50:17,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:50:17,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:50:17,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:50:17,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:50:17,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:50:17,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:50:17,924 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:50:17,924 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:50:17,925 INFO L432 ainManager$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.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-03 02:50:18,990 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:50:19,166 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:50:19,167 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-03 02:50:19,177 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862ba79c5/06565e52df9848748a00964cc3e8d5fe/FLAG917364afc [2023-04-03 02:50:19,187 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862ba79c5/06565e52df9848748a00964cc3e8d5fe [2023-04-03 02:50:19,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:50:19,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:50:19,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:50:19,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:50:19,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:50:19,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138d5916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19, skipping insertion in model container [2023-04-03 02:50:19,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:50:19,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:50:19,381 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.UNBOUNDED.pals.c.v+nlh-reducer.c[8458,8471] [2023-04-03 02:50:19,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:50:19,427 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:50:19,466 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.UNBOUNDED.pals.c.v+nlh-reducer.c[8458,8471] [2023-04-03 02:50:19,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:50:19,507 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:50:19,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19 WrapperNode [2023-04-03 02:50:19,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:50:19,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:50:19,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:50:19,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:50:19,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,548 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:50:19,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:50:19,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:50:19,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:50:19,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19" (1/1) ... [2023-04-03 02:50:19,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:50:19,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:50:19,584 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 02:50:19,616 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 02:50:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:50:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:50:19,642 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:50:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:50:19,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:50:19,643 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:50:19,643 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:50:19,643 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:50:19,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:50:19,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:50:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:50:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:50:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:50:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:50:19,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:50:19,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:50:19,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:50:19,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:50:19,751 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:50:19,752 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:50:20,255 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:50:20,416 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:50:20,416 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:50:20,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:50:20 BoogieIcfgContainer [2023-04-03 02:50:20,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:50:20,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:50:20,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:50:20,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:50:20,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:50:19" (1/3) ... [2023-04-03 02:50:20,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c0f299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:50:20, skipping insertion in model container [2023-04-03 02:50:20,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:50:19" (2/3) ... [2023-04-03 02:50:20,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c0f299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:50:20, skipping insertion in model container [2023-04-03 02:50:20,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:50:20" (3/3) ... [2023-04-03 02:50:20,425 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-03 02:50:20,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:50:20,440 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:50:20,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:50:20,494 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;@53a9c7fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:50:20,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:50:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 168 states, 162 states have (on average 1.6975308641975309) internal successors, (275), 163 states have internal predecessors, (275), 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 02:50:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 02:50:20,506 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:20,506 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] [2023-04-03 02:50:20,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:20,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash -260744172, now seen corresponding path program 1 times [2023-04-03 02:50:20,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:20,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958135248] [2023-04-03 02:50:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:20,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:21,107 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 02:50:21,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:21,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958135248] [2023-04-03 02:50:21,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958135248] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:21,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:21,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:50:21,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180828327] [2023-04-03 02:50:21,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:21,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:50:21,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:21,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:50:21,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:50:21,144 INFO L87 Difference]: Start difference. First operand has 168 states, 162 states have (on average 1.6975308641975309) internal successors, (275), 163 states have internal predecessors, (275), 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 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 02:50:21,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:21,453 INFO L93 Difference]: Finished difference Result 582 states and 922 transitions. [2023-04-03 02:50:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:50:21,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 71 [2023-04-03 02:50:21,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:21,470 INFO L225 Difference]: With dead ends: 582 [2023-04-03 02:50:21,470 INFO L226 Difference]: Without dead ends: 473 [2023-04-03 02:50:21,474 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 02:50:21,478 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 944 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:21,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 1255 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:50:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-03 02:50:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 465. [2023-04-03 02:50:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.4143167028199566) internal successors, (652), 461 states have internal predecessors, (652), 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 02:50:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 655 transitions. [2023-04-03 02:50:21,594 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 655 transitions. Word has length 71 [2023-04-03 02:50:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:21,594 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 655 transitions. [2023-04-03 02:50:21,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 02:50:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 655 transitions. [2023-04-03 02:50:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:50:21,602 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:21,602 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] [2023-04-03 02:50:21,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:50:21,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:21,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1996754420, now seen corresponding path program 1 times [2023-04-03 02:50:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:21,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207192812] [2023-04-03 02:50:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:21,792 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 02:50:21,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:21,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207192812] [2023-04-03 02:50:21,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207192812] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:21,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:21,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:50:21,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455344906] [2023-04-03 02:50:21,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:21,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:50:21,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:21,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:50:21,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:50:21,795 INFO L87 Difference]: Start difference. First operand 465 states and 655 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 02:50:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:22,058 INFO L93 Difference]: Finished difference Result 1136 states and 1648 transitions. [2023-04-03 02:50:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:50:22,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 72 [2023-04-03 02:50:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:22,066 INFO L225 Difference]: With dead ends: 1136 [2023-04-03 02:50:22,066 INFO L226 Difference]: Without dead ends: 732 [2023-04-03 02:50:22,073 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 02:50:22,075 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 578 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:22,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 233 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:50:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2023-04-03 02:50:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 730. [2023-04-03 02:50:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 726 states have (on average 1.4462809917355373) internal successors, (1050), 726 states have internal predecessors, (1050), 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 02:50:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1053 transitions. [2023-04-03 02:50:22,158 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1053 transitions. Word has length 72 [2023-04-03 02:50:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:22,159 INFO L495 AbstractCegarLoop]: Abstraction has 730 states and 1053 transitions. [2023-04-03 02:50:22,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 02:50:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1053 transitions. [2023-04-03 02:50:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:50:22,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:22,160 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] [2023-04-03 02:50:22,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:50:22,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:22,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:22,161 INFO L85 PathProgramCache]: Analyzing trace with hash 960627809, now seen corresponding path program 1 times [2023-04-03 02:50:22,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:22,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313864923] [2023-04-03 02:50:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:22,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:22,380 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 02:50:22,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313864923] [2023-04-03 02:50:22,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313864923] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:22,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:22,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:50:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120966239] [2023-04-03 02:50:22,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:22,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:50:22,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:50:22,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:50:22,384 INFO L87 Difference]: Start difference. First operand 730 states and 1053 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 02:50:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:22,776 INFO L93 Difference]: Finished difference Result 1844 states and 2725 transitions. [2023-04-03 02:50:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:50:22,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 72 [2023-04-03 02:50:22,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:22,782 INFO L225 Difference]: With dead ends: 1844 [2023-04-03 02:50:22,782 INFO L226 Difference]: Without dead ends: 1262 [2023-04-03 02:50:22,785 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 02:50:22,788 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 574 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:22,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 250 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:50:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2023-04-03 02:50:22,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1260. [2023-04-03 02:50:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1256 states have (on average 1.4689490445859872) internal successors, (1845), 1256 states have internal predecessors, (1845), 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 02:50:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1848 transitions. [2023-04-03 02:50:22,912 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1848 transitions. Word has length 72 [2023-04-03 02:50:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:22,913 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 1848 transitions. [2023-04-03 02:50:22,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 02:50:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1848 transitions. [2023-04-03 02:50:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:50:22,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:22,914 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] [2023-04-03 02:50:22,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:50:22,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:22,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 993571730, now seen corresponding path program 1 times [2023-04-03 02:50:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626803174] [2023-04-03 02:50:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:23,038 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 02:50:23,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:23,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626803174] [2023-04-03 02:50:23,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626803174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:23,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:23,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:50:23,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829664] [2023-04-03 02:50:23,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:23,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:50:23,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:23,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:50:23,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:50:23,040 INFO L87 Difference]: Start difference. First operand 1260 states and 1848 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 02:50:23,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:23,391 INFO L93 Difference]: Finished difference Result 3468 states and 5162 transitions. [2023-04-03 02:50:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:50:23,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 72 [2023-04-03 02:50:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:23,399 INFO L225 Difference]: With dead ends: 3468 [2023-04-03 02:50:23,399 INFO L226 Difference]: Without dead ends: 2322 [2023-04-03 02:50:23,401 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 02:50:23,402 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 544 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:23,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 249 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:50:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2023-04-03 02:50:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2320. [2023-04-03 02:50:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2316 states have (on average 1.4792746113989637) internal successors, (3426), 2316 states have internal predecessors, (3426), 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 02:50:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3429 transitions. [2023-04-03 02:50:23,654 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3429 transitions. Word has length 72 [2023-04-03 02:50:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:23,655 INFO L495 AbstractCegarLoop]: Abstraction has 2320 states and 3429 transitions. [2023-04-03 02:50:23,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 02:50:23,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3429 transitions. [2023-04-03 02:50:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:50:23,655 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:23,656 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] [2023-04-03 02:50:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:50:23,656 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:23,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash -552503613, now seen corresponding path program 1 times [2023-04-03 02:50:23,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:23,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497465598] [2023-04-03 02:50:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:23,735 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 02:50:23,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:23,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497465598] [2023-04-03 02:50:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497465598] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:23,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:23,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:50:23,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535104751] [2023-04-03 02:50:23,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:23,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:50:23,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:23,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:50:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:50:23,737 INFO L87 Difference]: Start difference. First operand 2320 states and 3429 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 02:50:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:24,435 INFO L93 Difference]: Finished difference Result 6678 states and 9953 transitions. [2023-04-03 02:50:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:50:24,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 72 [2023-04-03 02:50:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:24,449 INFO L225 Difference]: With dead ends: 6678 [2023-04-03 02:50:24,449 INFO L226 Difference]: Without dead ends: 4442 [2023-04-03 02:50:24,460 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 02:50:24,460 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 549 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:24,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 241 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:50:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2023-04-03 02:50:24,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 4440. [2023-04-03 02:50:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4440 states, 4436 states have (on average 1.4792605951307485) internal successors, (6562), 4436 states have internal predecessors, (6562), 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 02:50:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4440 states to 4440 states and 6565 transitions. [2023-04-03 02:50:24,927 INFO L78 Accepts]: Start accepts. Automaton has 4440 states and 6565 transitions. Word has length 72 [2023-04-03 02:50:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:24,927 INFO L495 AbstractCegarLoop]: Abstraction has 4440 states and 6565 transitions. [2023-04-03 02:50:24,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 02:50:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4440 states and 6565 transitions. [2023-04-03 02:50:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:50:24,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:24,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:50:24,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:50:24,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:24,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:24,929 INFO L85 PathProgramCache]: Analyzing trace with hash -326616795, now seen corresponding path program 1 times [2023-04-03 02:50:24,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:24,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666519714] [2023-04-03 02:50:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:24,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:25,000 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 02:50:25,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:25,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666519714] [2023-04-03 02:50:25,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666519714] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:25,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:25,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:50:25,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772496443] [2023-04-03 02:50:25,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:25,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:50:25,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:50:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:50:25,001 INFO L87 Difference]: Start difference. First operand 4440 states and 6565 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 02:50:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:25,994 INFO L93 Difference]: Finished difference Result 12357 states and 18330 transitions. [2023-04-03 02:50:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:50:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 72 [2023-04-03 02:50:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:26,029 INFO L225 Difference]: With dead ends: 12357 [2023-04-03 02:50:26,029 INFO L226 Difference]: Without dead ends: 7962 [2023-04-03 02:50:26,037 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 02:50:26,039 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 565 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:26,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 225 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:50:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7962 states. [2023-04-03 02:50:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7962 to 7960. [2023-04-03 02:50:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7960 states, 7956 states have (on average 1.4680744092508797) internal successors, (11680), 7956 states have internal predecessors, (11680), 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 02:50:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7960 states to 7960 states and 11683 transitions. [2023-04-03 02:50:26,924 INFO L78 Accepts]: Start accepts. Automaton has 7960 states and 11683 transitions. Word has length 72 [2023-04-03 02:50:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:26,925 INFO L495 AbstractCegarLoop]: Abstraction has 7960 states and 11683 transitions. [2023-04-03 02:50:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 02:50:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 7960 states and 11683 transitions. [2023-04-03 02:50:26,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:50:26,925 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:26,926 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] [2023-04-03 02:50:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:50:26,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:26,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:26,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1645509495, now seen corresponding path program 1 times [2023-04-03 02:50:26,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:26,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39076242] [2023-04-03 02:50:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:26,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:28,191 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 02:50:28,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:28,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39076242] [2023-04-03 02:50:28,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39076242] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:28,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:28,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:50:28,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168337085] [2023-04-03 02:50:28,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:50:28,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:28,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:50:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:50:28,193 INFO L87 Difference]: Start difference. First operand 7960 states and 11683 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:30,879 INFO L93 Difference]: Finished difference Result 17966 states and 26302 transitions. [2023-04-03 02:50:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:50:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 02:50:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:30,923 INFO L225 Difference]: With dead ends: 17966 [2023-04-03 02:50:30,923 INFO L226 Difference]: Without dead ends: 17964 [2023-04-03 02:50:30,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:50:30,938 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 856 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:30,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 2107 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:50:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17964 states. [2023-04-03 02:50:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17964 to 14245. [2023-04-03 02:50:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14245 states, 14241 states have (on average 1.461484446316972) internal successors, (20813), 14241 states have internal predecessors, (20813), 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 02:50:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14245 states to 14245 states and 20816 transitions. [2023-04-03 02:50:32,646 INFO L78 Accepts]: Start accepts. Automaton has 14245 states and 20816 transitions. Word has length 73 [2023-04-03 02:50:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:32,646 INFO L495 AbstractCegarLoop]: Abstraction has 14245 states and 20816 transitions. [2023-04-03 02:50:32,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:32,647 INFO L276 IsEmpty]: Start isEmpty. Operand 14245 states and 20816 transitions. [2023-04-03 02:50:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:50:32,648 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:32,648 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] [2023-04-03 02:50:32,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:50:32,648 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:32,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:32,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1233544791, now seen corresponding path program 1 times [2023-04-03 02:50:32,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:32,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793166385] [2023-04-03 02:50:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:32,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:34,187 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 02:50:34,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793166385] [2023-04-03 02:50:34,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793166385] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:34,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:34,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:50:34,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727364041] [2023-04-03 02:50:34,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:34,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:50:34,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:50:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:50:34,189 INFO L87 Difference]: Start difference. First operand 14245 states and 20816 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 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 02:50:37,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:37,627 INFO L93 Difference]: Finished difference Result 17403 states and 25343 transitions. [2023-04-03 02:50:37,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-03 02:50:37,627 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 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 73 [2023-04-03 02:50:37,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:37,661 INFO L225 Difference]: With dead ends: 17403 [2023-04-03 02:50:37,661 INFO L226 Difference]: Without dead ends: 17401 [2023-04-03 02:50:37,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=330, Invalid=1230, Unknown=0, NotChecked=0, Total=1560 [2023-04-03 02:50:37,670 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 1408 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:37,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1408 Valid, 1722 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:50:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17401 states. [2023-04-03 02:50:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17401 to 14271. [2023-04-03 02:50:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14271 states, 14267 states have (on average 1.4610639938319199) internal successors, (20845), 14267 states have internal predecessors, (20845), 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 02:50:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14271 states to 14271 states and 20848 transitions. [2023-04-03 02:50:39,334 INFO L78 Accepts]: Start accepts. Automaton has 14271 states and 20848 transitions. Word has length 73 [2023-04-03 02:50:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:39,334 INFO L495 AbstractCegarLoop]: Abstraction has 14271 states and 20848 transitions. [2023-04-03 02:50:39,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 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 02:50:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 14271 states and 20848 transitions. [2023-04-03 02:50:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:50:39,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:39,335 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] [2023-04-03 02:50:39,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:50:39,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:39,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:39,336 INFO L85 PathProgramCache]: Analyzing trace with hash 33193289, now seen corresponding path program 1 times [2023-04-03 02:50:39,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:39,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898344354] [2023-04-03 02:50:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:40,319 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 02:50:40,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:40,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898344354] [2023-04-03 02:50:40,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898344354] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:40,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:40,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:50:40,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114351260] [2023-04-03 02:50:40,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:40,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:50:40,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:50:40,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:50:40,321 INFO L87 Difference]: Start difference. First operand 14271 states and 20848 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:42,850 INFO L93 Difference]: Finished difference Result 19475 states and 28380 transitions. [2023-04-03 02:50:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:50:42,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 02:50:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:42,879 INFO L225 Difference]: With dead ends: 19475 [2023-04-03 02:50:42,879 INFO L226 Difference]: Without dead ends: 17489 [2023-04-03 02:50:42,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:50:42,886 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 939 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:42,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 1610 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:50:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17489 states. [2023-04-03 02:50:44,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17489 to 16079. [2023-04-03 02:50:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16079 states, 16075 states have (on average 1.4586003110419907) internal successors, (23447), 16075 states have internal predecessors, (23447), 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 02:50:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16079 states to 16079 states and 23450 transitions. [2023-04-03 02:50:44,800 INFO L78 Accepts]: Start accepts. Automaton has 16079 states and 23450 transitions. Word has length 73 [2023-04-03 02:50:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:44,801 INFO L495 AbstractCegarLoop]: Abstraction has 16079 states and 23450 transitions. [2023-04-03 02:50:44,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 16079 states and 23450 transitions. [2023-04-03 02:50:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:50:44,802 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:44,802 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] [2023-04-03 02:50:44,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:50:44,802 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:44,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash 419635433, now seen corresponding path program 1 times [2023-04-03 02:50:44,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:44,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302430522] [2023-04-03 02:50:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:44,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:45,649 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 02:50:45,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:45,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302430522] [2023-04-03 02:50:45,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302430522] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:45,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:45,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:50:45,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783457744] [2023-04-03 02:50:45,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:45,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:50:45,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:45,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:50:45,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:50:45,651 INFO L87 Difference]: Start difference. First operand 16079 states and 23450 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:48,910 INFO L93 Difference]: Finished difference Result 23474 states and 34211 transitions. [2023-04-03 02:50:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:50:48,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 02:50:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:48,943 INFO L225 Difference]: With dead ends: 23474 [2023-04-03 02:50:48,944 INFO L226 Difference]: Without dead ends: 23472 [2023-04-03 02:50:48,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:50:48,950 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 957 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:48,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 1392 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:50:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23472 states. [2023-04-03 02:50:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23472 to 16101. [2023-04-03 02:50:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16101 states, 16097 states have (on average 1.4582841523265204) internal successors, (23474), 16097 states have internal predecessors, (23474), 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 02:50:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16101 states to 16101 states and 23477 transitions. [2023-04-03 02:50:51,076 INFO L78 Accepts]: Start accepts. Automaton has 16101 states and 23477 transitions. Word has length 73 [2023-04-03 02:50:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:51,077 INFO L495 AbstractCegarLoop]: Abstraction has 16101 states and 23477 transitions. [2023-04-03 02:50:51,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 16101 states and 23477 transitions. [2023-04-03 02:50:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:50:51,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:51,078 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] [2023-04-03 02:50:51,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:50:51,079 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:51,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:51,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1795926057, now seen corresponding path program 1 times [2023-04-03 02:50:51,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:51,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977317901] [2023-04-03 02:50:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:51,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:52,005 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 02:50:52,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:52,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977317901] [2023-04-03 02:50:52,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977317901] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:52,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:52,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:50:52,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707660336] [2023-04-03 02:50:52,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:52,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:50:52,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:52,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:50:52,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:50:52,007 INFO L87 Difference]: Start difference. First operand 16101 states and 23477 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:56,242 INFO L93 Difference]: Finished difference Result 28578 states and 41774 transitions. [2023-04-03 02:50:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:50:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 02:50:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:56,297 INFO L225 Difference]: With dead ends: 28578 [2023-04-03 02:50:56,298 INFO L226 Difference]: Without dead ends: 28576 [2023-04-03 02:50:56,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:50:56,309 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 831 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:56,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 1597 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:50:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28576 states. [2023-04-03 02:50:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28576 to 17628. [2023-04-03 02:50:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17628 states, 17624 states have (on average 1.4593735814798003) internal successors, (25720), 17624 states have internal predecessors, (25720), 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 02:50:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17628 states to 17628 states and 25723 transitions. [2023-04-03 02:50:58,704 INFO L78 Accepts]: Start accepts. Automaton has 17628 states and 25723 transitions. Word has length 73 [2023-04-03 02:50:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:58,704 INFO L495 AbstractCegarLoop]: Abstraction has 17628 states and 25723 transitions. [2023-04-03 02:50:58,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:50:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 17628 states and 25723 transitions. [2023-04-03 02:50:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:50:58,705 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:58,706 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] [2023-04-03 02:50:58,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:50:58,706 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:58,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:58,706 INFO L85 PathProgramCache]: Analyzing trace with hash -553158434, now seen corresponding path program 1 times [2023-04-03 02:50:58,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:58,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733968100] [2023-04-03 02:50:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:58,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:00,120 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 02:51:00,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:00,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733968100] [2023-04-03 02:51:00,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733968100] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:00,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:00,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-03 02:51:00,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977259113] [2023-04-03 02:51:00,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:00,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-03 02:51:00,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:00,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-03 02:51:00,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:51:00,122 INFO L87 Difference]: Start difference. First operand 17628 states and 25723 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 02:51:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:06,600 INFO L93 Difference]: Finished difference Result 33915 states and 49460 transitions. [2023-04-03 02:51:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:51:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 75 [2023-04-03 02:51:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:06,658 INFO L225 Difference]: With dead ends: 33915 [2023-04-03 02:51:06,658 INFO L226 Difference]: Without dead ends: 33913 [2023-04-03 02:51:06,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:51:06,669 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1862 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:06,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1862 Valid, 2208 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 02:51:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33913 states. [2023-04-03 02:51:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33913 to 17631. [2023-04-03 02:51:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17631 states, 17627 states have (on average 1.459295399103648) internal successors, (25723), 17627 states have internal predecessors, (25723), 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 02:51:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17631 states to 17631 states and 25726 transitions. [2023-04-03 02:51:09,572 INFO L78 Accepts]: Start accepts. Automaton has 17631 states and 25726 transitions. Word has length 75 [2023-04-03 02:51:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:51:09,572 INFO L495 AbstractCegarLoop]: Abstraction has 17631 states and 25726 transitions. [2023-04-03 02:51:09,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 02:51:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 17631 states and 25726 transitions. [2023-04-03 02:51:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:51:09,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:09,581 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] [2023-04-03 02:51:09,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:51:09,582 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:09,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash 713579646, now seen corresponding path program 1 times [2023-04-03 02:51:09,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:09,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294749729] [2023-04-03 02:51:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:10,518 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 02:51:10,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:10,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294749729] [2023-04-03 02:51:10,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294749729] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:10,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:10,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:51:10,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003906282] [2023-04-03 02:51:10,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:10,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:51:10,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:10,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:51:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:51:10,520 INFO L87 Difference]: Start difference. First operand 17631 states and 25726 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:51:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:15,776 INFO L93 Difference]: Finished difference Result 34894 states and 50862 transitions. [2023-04-03 02:51:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:51:15,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:51:15,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:15,824 INFO L225 Difference]: With dead ends: 34894 [2023-04-03 02:51:15,824 INFO L226 Difference]: Without dead ends: 30924 [2023-04-03 02:51:15,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2023-04-03 02:51:15,839 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 877 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:15,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 1798 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:51:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30924 states. [2023-04-03 02:51:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30924 to 21049. [2023-04-03 02:51:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21049 states, 21045 states have (on average 1.4564029460679497) internal successors, (30650), 21045 states have internal predecessors, (30650), 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 02:51:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21049 states to 21049 states and 30653 transitions. [2023-04-03 02:51:19,271 INFO L78 Accepts]: Start accepts. Automaton has 21049 states and 30653 transitions. Word has length 75 [2023-04-03 02:51:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:51:19,272 INFO L495 AbstractCegarLoop]: Abstraction has 21049 states and 30653 transitions. [2023-04-03 02:51:19,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:51:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 21049 states and 30653 transitions. [2023-04-03 02:51:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:51:19,273 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:19,273 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] [2023-04-03 02:51:19,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:51:19,273 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:19,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:19,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1100021790, now seen corresponding path program 1 times [2023-04-03 02:51:19,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:19,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241159359] [2023-04-03 02:51:19,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:19,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:20,542 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 02:51:20,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:20,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241159359] [2023-04-03 02:51:20,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241159359] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:20,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:20,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-03 02:51:20,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608509802] [2023-04-03 02:51:20,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:20,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-03 02:51:20,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:20,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-03 02:51:20,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:51:20,544 INFO L87 Difference]: Start difference. First operand 21049 states and 30653 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 02:51:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:27,049 INFO L93 Difference]: Finished difference Result 28506 states and 41484 transitions. [2023-04-03 02:51:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:51:27,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 75 [2023-04-03 02:51:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:27,091 INFO L225 Difference]: With dead ends: 28506 [2023-04-03 02:51:27,091 INFO L226 Difference]: Without dead ends: 28504 [2023-04-03 02:51:27,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=1382, Unknown=0, NotChecked=0, Total=1722 [2023-04-03 02:51:27,099 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 1142 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 3219 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 3244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:27,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 2646 Invalid, 3244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3219 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-03 02:51:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28504 states. [2023-04-03 02:51:30,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28504 to 21049. [2023-04-03 02:51:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21049 states, 21045 states have (on average 1.4564029460679497) internal successors, (30650), 21045 states have internal predecessors, (30650), 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 02:51:30,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21049 states to 21049 states and 30653 transitions. [2023-04-03 02:51:30,499 INFO L78 Accepts]: Start accepts. Automaton has 21049 states and 30653 transitions. Word has length 75 [2023-04-03 02:51:30,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:51:30,499 INFO L495 AbstractCegarLoop]: Abstraction has 21049 states and 30653 transitions. [2023-04-03 02:51:30,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 02:51:30,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21049 states and 30653 transitions. [2023-04-03 02:51:30,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:51:30,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:30,501 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] [2023-04-03 02:51:30,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:51:30,501 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:30,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:30,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2067480990, now seen corresponding path program 1 times [2023-04-03 02:51:30,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:30,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756413327] [2023-04-03 02:51:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:30,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:31,537 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 02:51:31,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:31,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756413327] [2023-04-03 02:51:31,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756413327] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:31,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:31,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:51:31,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215986616] [2023-04-03 02:51:31,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:31,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:51:31,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:31,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:51:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:51:31,539 INFO L87 Difference]: Start difference. First operand 21049 states and 30653 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:51:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:36,562 INFO L93 Difference]: Finished difference Result 26188 states and 38008 transitions. [2023-04-03 02:51:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:51:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:51:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:36,604 INFO L225 Difference]: With dead ends: 26188 [2023-04-03 02:51:36,604 INFO L226 Difference]: Without dead ends: 26186 [2023-04-03 02:51:36,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:51:36,611 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 809 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 3285 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:36,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 3285 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:51:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26186 states. [2023-04-03 02:51:40,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26186 to 22046. [2023-04-03 02:51:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22046 states, 22042 states have (on average 1.4546774339896562) internal successors, (32064), 22042 states have internal predecessors, (32064), 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 02:51:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22046 states to 22046 states and 32067 transitions. [2023-04-03 02:51:40,369 INFO L78 Accepts]: Start accepts. Automaton has 22046 states and 32067 transitions. Word has length 75 [2023-04-03 02:51:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:51:40,369 INFO L495 AbstractCegarLoop]: Abstraction has 22046 states and 32067 transitions. [2023-04-03 02:51:40,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:51:40,369 INFO L276 IsEmpty]: Start isEmpty. Operand 22046 states and 32067 transitions. [2023-04-03 02:51:40,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:51:40,371 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:40,371 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] [2023-04-03 02:51:40,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:51:40,371 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:40,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:40,371 INFO L85 PathProgramCache]: Analyzing trace with hash -223773378, now seen corresponding path program 1 times [2023-04-03 02:51:40,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:40,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505671585] [2023-04-03 02:51:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:40,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:41,292 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 02:51:41,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:41,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505671585] [2023-04-03 02:51:41,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505671585] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:41,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:41,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:51:41,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970093460] [2023-04-03 02:51:41,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:41,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:51:41,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:41,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:51:41,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:51:41,294 INFO L87 Difference]: Start difference. First operand 22046 states and 32067 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:51:47,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:47,999 INFO L93 Difference]: Finished difference Result 35118 states and 51009 transitions. [2023-04-03 02:51:48,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:51:48,000 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:51:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:48,056 INFO L225 Difference]: With dead ends: 35118 [2023-04-03 02:51:48,056 INFO L226 Difference]: Without dead ends: 35116 [2023-04-03 02:51:48,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2023-04-03 02:51:48,065 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 818 mSDsluCounter, 2969 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:48,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 3320 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:51:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35116 states. [2023-04-03 02:51:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35116 to 22070. [2023-04-03 02:51:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22070 states, 22066 states have (on average 1.4544548173660836) internal successors, (32094), 22066 states have internal predecessors, (32094), 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 02:51:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22070 states to 22070 states and 32097 transitions. [2023-04-03 02:51:51,935 INFO L78 Accepts]: Start accepts. Automaton has 22070 states and 32097 transitions. Word has length 75 [2023-04-03 02:51:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:51:51,936 INFO L495 AbstractCegarLoop]: Abstraction has 22070 states and 32097 transitions. [2023-04-03 02:51:51,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:51:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 22070 states and 32097 transitions. [2023-04-03 02:51:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:51:51,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:51,937 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] [2023-04-03 02:51:51,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:51:51,937 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:51,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1042964702, now seen corresponding path program 1 times [2023-04-03 02:51:51,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:51,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796293374] [2023-04-03 02:51:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:51,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:52,871 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 02:51:52,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:52,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796293374] [2023-04-03 02:51:52,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796293374] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:52,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:52,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:51:52,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899235319] [2023-04-03 02:51:52,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:52,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:51:52,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:52,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:51:52,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:51:52,875 INFO L87 Difference]: Start difference. First operand 22070 states and 32097 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:51:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:58,586 INFO L93 Difference]: Finished difference Result 29099 states and 42252 transitions. [2023-04-03 02:51:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:51:58,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:51:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:58,629 INFO L225 Difference]: With dead ends: 29099 [2023-04-03 02:51:58,629 INFO L226 Difference]: Without dead ends: 27113 [2023-04-03 02:51:58,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2023-04-03 02:51:58,653 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 669 mSDsluCounter, 2724 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:58,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 3076 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:51:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27113 states. [2023-04-03 02:52:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27113 to 22070. [2023-04-03 02:52:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22070 states, 22066 states have (on average 1.4544548173660836) internal successors, (32094), 22066 states have internal predecessors, (32094), 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 02:52:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22070 states to 22070 states and 32097 transitions. [2023-04-03 02:52:02,435 INFO L78 Accepts]: Start accepts. Automaton has 22070 states and 32097 transitions. Word has length 75 [2023-04-03 02:52:02,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:02,436 INFO L495 AbstractCegarLoop]: Abstraction has 22070 states and 32097 transitions. [2023-04-03 02:52:02,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:52:02,436 INFO L276 IsEmpty]: Start isEmpty. Operand 22070 states and 32097 transitions. [2023-04-03 02:52:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:52:02,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:02,437 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] [2023-04-03 02:52:02,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:52:02,437 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:02,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:02,438 INFO L85 PathProgramCache]: Analyzing trace with hash -870375586, now seen corresponding path program 1 times [2023-04-03 02:52:02,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:02,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365943850] [2023-04-03 02:52:02,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:02,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:03,827 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 02:52:03,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:03,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365943850] [2023-04-03 02:52:03,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365943850] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:03,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:03,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-03 02:52:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784995446] [2023-04-03 02:52:03,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:03,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-03 02:52:03,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:03,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-03 02:52:03,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:52:03,829 INFO L87 Difference]: Start difference. First operand 22070 states and 32097 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 02:52:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:12,553 INFO L93 Difference]: Finished difference Result 32125 states and 46769 transitions. [2023-04-03 02:52:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:52:12,554 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 75 [2023-04-03 02:52:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:12,609 INFO L225 Difference]: With dead ends: 32125 [2023-04-03 02:52:12,610 INFO L226 Difference]: Without dead ends: 32123 [2023-04-03 02:52:12,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=1659, Unknown=0, NotChecked=0, Total=2070 [2023-04-03 02:52:12,619 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 1595 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 3354 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:12,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1595 Valid, 2661 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3354 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-03 02:52:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32123 states. [2023-04-03 02:52:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32123 to 22085. [2023-04-03 02:52:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22085 states, 22081 states have (on average 1.4544178252796522) internal successors, (32115), 22081 states have internal predecessors, (32115), 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 02:52:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22085 states to 22085 states and 32118 transitions. [2023-04-03 02:52:17,048 INFO L78 Accepts]: Start accepts. Automaton has 22085 states and 32118 transitions. Word has length 75 [2023-04-03 02:52:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:17,050 INFO L495 AbstractCegarLoop]: Abstraction has 22085 states and 32118 transitions. [2023-04-03 02:52:17,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 02:52:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 22085 states and 32118 transitions. [2023-04-03 02:52:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:52:17,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:17,065 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] [2023-04-03 02:52:17,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:52:17,065 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:17,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:17,066 INFO L85 PathProgramCache]: Analyzing trace with hash -458410882, now seen corresponding path program 1 times [2023-04-03 02:52:17,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:17,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826447841] [2023-04-03 02:52:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:17,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:18,105 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 02:52:18,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:18,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826447841] [2023-04-03 02:52:18,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826447841] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:18,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:18,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:52:18,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718018470] [2023-04-03 02:52:18,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:18,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:52:18,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:52:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:52:18,106 INFO L87 Difference]: Start difference. First operand 22085 states and 32118 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:52:28,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:28,036 INFO L93 Difference]: Finished difference Result 40851 states and 59543 transitions. [2023-04-03 02:52:28,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:52:28,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:52:28,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:28,104 INFO L225 Difference]: With dead ends: 40851 [2023-04-03 02:52:28,104 INFO L226 Difference]: Without dead ends: 40849 [2023-04-03 02:52:28,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-04-03 02:52:28,118 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 706 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:28,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 2383 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:52:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40849 states. [2023-04-03 02:52:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40849 to 22088. [2023-04-03 02:52:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22088 states, 22084 states have (on average 1.4543560949103422) internal successors, (32118), 22084 states have internal predecessors, (32118), 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 02:52:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22088 states to 22088 states and 32121 transitions. [2023-04-03 02:52:33,082 INFO L78 Accepts]: Start accepts. Automaton has 22088 states and 32121 transitions. Word has length 75 [2023-04-03 02:52:33,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:33,082 INFO L495 AbstractCegarLoop]: Abstraction has 22088 states and 32121 transitions. [2023-04-03 02:52:33,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:52:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 22088 states and 32121 transitions. [2023-04-03 02:52:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:52:33,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:33,110 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] [2023-04-03 02:52:33,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:52:33,110 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:33,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:33,110 INFO L85 PathProgramCache]: Analyzing trace with hash 808327198, now seen corresponding path program 1 times [2023-04-03 02:52:33,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:33,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931673181] [2023-04-03 02:52:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:33,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:34,255 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 02:52:34,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931673181] [2023-04-03 02:52:34,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931673181] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:34,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:34,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-03 02:52:34,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031162557] [2023-04-03 02:52:34,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:34,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-03 02:52:34,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-03 02:52:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:52:34,257 INFO L87 Difference]: Start difference. First operand 22088 states and 32121 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 02:52:45,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:45,275 INFO L93 Difference]: Finished difference Result 43343 states and 63170 transitions. [2023-04-03 02:52:45,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:52:45,276 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 75 [2023-04-03 02:52:45,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:45,337 INFO L225 Difference]: With dead ends: 43343 [2023-04-03 02:52:45,338 INFO L226 Difference]: Without dead ends: 39373 [2023-04-03 02:52:45,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=1382, Unknown=0, NotChecked=0, Total=1722 [2023-04-03 02:52:45,352 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 1319 mSDsluCounter, 2717 mSDsCounter, 0 mSdLazyCounter, 3770 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 3808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:45,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1319 Valid, 2953 Invalid, 3808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3770 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-03 02:52:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39373 states. [2023-04-03 02:52:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39373 to 23608. [2023-04-03 02:52:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23608 states, 23604 states have (on average 1.4539908490086426) internal successors, (34320), 23604 states have internal predecessors, (34320), 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 02:52:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23608 states to 23608 states and 34323 transitions. [2023-04-03 02:52:51,584 INFO L78 Accepts]: Start accepts. Automaton has 23608 states and 34323 transitions. Word has length 75 [2023-04-03 02:52:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:51,584 INFO L495 AbstractCegarLoop]: Abstraction has 23608 states and 34323 transitions. [2023-04-03 02:52:51,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 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 02:52:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 23608 states and 34323 transitions. [2023-04-03 02:52:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:52:51,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:51,585 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] [2023-04-03 02:52:51,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:52:51,586 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:51,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:51,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1194769342, now seen corresponding path program 1 times [2023-04-03 02:52:51,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:51,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330954463] [2023-04-03 02:52:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:51,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:52,470 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 02:52:52,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:52,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330954463] [2023-04-03 02:52:52,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330954463] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:52,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:52,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:52:52,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601270447] [2023-04-03 02:52:52,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:52,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:52:52,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:52:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:52:52,473 INFO L87 Difference]: Start difference. First operand 23608 states and 34323 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:53:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:05,025 INFO L93 Difference]: Finished difference Result 46805 states and 68066 transitions. [2023-04-03 02:53:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:53:05,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:53:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:05,106 INFO L225 Difference]: With dead ends: 46805 [2023-04-03 02:53:05,106 INFO L226 Difference]: Without dead ends: 46803 [2023-04-03 02:53:05,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2023-04-03 02:53:05,121 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 800 mSDsluCounter, 2716 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 3073 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:05,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 3073 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:53:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46803 states. [2023-04-03 02:53:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46803 to 23622. [2023-04-03 02:53:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23622 states, 23618 states have (on average 1.4539334405961555) internal successors, (34339), 23618 states have internal predecessors, (34339), 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 02:53:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23622 states to 23622 states and 34342 transitions. [2023-04-03 02:53:11,664 INFO L78 Accepts]: Start accepts. Automaton has 23622 states and 34342 transitions. Word has length 75 [2023-04-03 02:53:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:11,664 INFO L495 AbstractCegarLoop]: Abstraction has 23622 states and 34342 transitions. [2023-04-03 02:53:11,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 02:53:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 23622 states and 34342 transitions. [2023-04-03 02:53:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:53:11,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:11,665 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] [2023-04-03 02:53:11,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:53:11,666 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:11,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash 454942943, now seen corresponding path program 1 times [2023-04-03 02:53:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:11,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355171650] [2023-04-03 02:53:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:11,706 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 02:53:11,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:11,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355171650] [2023-04-03 02:53:11,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355171650] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:11,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:11,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:53:11,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495502676] [2023-04-03 02:53:11,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:11,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:53:11,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:11,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:53:11,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:53:11,708 INFO L87 Difference]: Start difference. First operand 23622 states and 34342 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:17,837 INFO L93 Difference]: Finished difference Result 43330 states and 63200 transitions. [2023-04-03 02:53:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:53:17,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-03 02:53:17,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:17,876 INFO L225 Difference]: With dead ends: 43330 [2023-04-03 02:53:17,876 INFO L226 Difference]: Without dead ends: 22922 [2023-04-03 02:53:17,902 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 02:53:17,903 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 145 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:17,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 373 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:53:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22922 states. [2023-04-03 02:53:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22922 to 22920. [2023-04-03 02:53:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22920 states, 22916 states have (on average 1.452565892825973) internal successors, (33287), 22916 states have internal predecessors, (33287), 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 02:53:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22920 states to 22920 states and 33290 transitions. [2023-04-03 02:53:24,281 INFO L78 Accepts]: Start accepts. Automaton has 22920 states and 33290 transitions. Word has length 76 [2023-04-03 02:53:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:24,281 INFO L495 AbstractCegarLoop]: Abstraction has 22920 states and 33290 transitions. [2023-04-03 02:53:24,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22920 states and 33290 transitions. [2023-04-03 02:53:24,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:53:24,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:24,282 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] [2023-04-03 02:53:24,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:53:24,282 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:24,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:24,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1714594138, now seen corresponding path program 1 times [2023-04-03 02:53:24,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:24,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005555993] [2023-04-03 02:53:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:24,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:24,313 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 02:53:24,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:24,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005555993] [2023-04-03 02:53:24,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005555993] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:24,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:24,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:53:24,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219433026] [2023-04-03 02:53:24,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:24,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:53:24,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:53:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:53:24,315 INFO L87 Difference]: Start difference. First operand 22920 states and 33290 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:30,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:30,335 INFO L93 Difference]: Finished difference Result 38236 states and 55666 transitions. [2023-04-03 02:53:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:53:30,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-03 02:53:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:30,368 INFO L225 Difference]: With dead ends: 38236 [2023-04-03 02:53:30,368 INFO L226 Difference]: Without dead ends: 22216 [2023-04-03 02:53:30,390 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 02:53:30,391 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 146 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 365 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 02:53:30,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 365 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:53:30,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22216 states. [2023-04-03 02:53:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22216 to 22214. [2023-04-03 02:53:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22214 states, 22210 states have (on average 1.4513282305267898) internal successors, (32234), 22210 states have internal predecessors, (32234), 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 02:53:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22214 states to 22214 states and 32237 transitions. [2023-04-03 02:53:36,353 INFO L78 Accepts]: Start accepts. Automaton has 22214 states and 32237 transitions. Word has length 76 [2023-04-03 02:53:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:36,353 INFO L495 AbstractCegarLoop]: Abstraction has 22214 states and 32237 transitions. [2023-04-03 02:53:36,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 22214 states and 32237 transitions. [2023-04-03 02:53:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:53:36,355 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:36,355 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] [2023-04-03 02:53:36,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:53:36,355 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:36,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:36,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1580286565, now seen corresponding path program 1 times [2023-04-03 02:53:36,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:36,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719355825] [2023-04-03 02:53:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:36,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:36,387 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 02:53:36,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:36,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719355825] [2023-04-03 02:53:36,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719355825] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:36,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:36,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:53:36,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767744248] [2023-04-03 02:53:36,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:36,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:53:36,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:36,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:53:36,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:53:36,389 INFO L87 Difference]: Start difference. First operand 22214 states and 32237 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:42,213 INFO L93 Difference]: Finished difference Result 41307 states and 60138 transitions. [2023-04-03 02:53:42,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:53:42,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-03 02:53:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:42,242 INFO L225 Difference]: With dead ends: 41307 [2023-04-03 02:53:42,242 INFO L226 Difference]: Without dead ends: 20287 [2023-04-03 02:53:42,261 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 02:53:42,261 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 132 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:42,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 363 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:53:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20287 states. [2023-04-03 02:53:47,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20287 to 20154. [2023-04-03 02:53:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20154 states, 20150 states have (on average 1.448833746898263) internal successors, (29194), 20150 states have internal predecessors, (29194), 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 02:53:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20154 states to 20154 states and 29197 transitions. [2023-04-03 02:53:47,739 INFO L78 Accepts]: Start accepts. Automaton has 20154 states and 29197 transitions. Word has length 76 [2023-04-03 02:53:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:47,740 INFO L495 AbstractCegarLoop]: Abstraction has 20154 states and 29197 transitions. [2023-04-03 02:53:47,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20154 states and 29197 transitions. [2023-04-03 02:53:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:53:47,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:47,741 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] [2023-04-03 02:53:47,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:53:47,741 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:47,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1412526686, now seen corresponding path program 1 times [2023-04-03 02:53:47,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:47,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509131817] [2023-04-03 02:53:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:47,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:47,772 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 02:53:47,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:47,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509131817] [2023-04-03 02:53:47,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509131817] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:47,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:47,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:53:47,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079007359] [2023-04-03 02:53:47,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:47,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:53:47,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:53:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:53:47,773 INFO L87 Difference]: Start difference. First operand 20154 states and 29197 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:53,191 INFO L93 Difference]: Finished difference Result 37034 states and 53805 transitions. [2023-04-03 02:53:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:53:53,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-03 02:53:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:53,220 INFO L225 Difference]: With dead ends: 37034 [2023-04-03 02:53:53,220 INFO L226 Difference]: Without dead ends: 19524 [2023-04-03 02:53:53,238 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 02:53:53,239 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 130 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:53,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 365 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:53:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19524 states. [2023-04-03 02:53:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19524 to 19522. [2023-04-03 02:53:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19522 states, 19518 states have (on average 1.4472281996106158) internal successors, (28247), 19518 states have internal predecessors, (28247), 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 02:53:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19522 states to 19522 states and 28250 transitions. [2023-04-03 02:53:58,671 INFO L78 Accepts]: Start accepts. Automaton has 19522 states and 28250 transitions. Word has length 76 [2023-04-03 02:53:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:58,672 INFO L495 AbstractCegarLoop]: Abstraction has 19522 states and 28250 transitions. [2023-04-03 02:53:58,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 19522 states and 28250 transitions. [2023-04-03 02:53:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:53:58,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:58,673 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] [2023-04-03 02:53:58,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-03 02:53:58,673 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:58,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:58,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1626059043, now seen corresponding path program 1 times [2023-04-03 02:53:58,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:58,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805389272] [2023-04-03 02:53:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:58,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:58,703 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 02:53:58,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:58,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805389272] [2023-04-03 02:53:58,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805389272] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:58,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:58,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:53:58,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465486012] [2023-04-03 02:53:58,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:58,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:53:58,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:58,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:53:58,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:53:58,704 INFO L87 Difference]: Start difference. First operand 19522 states and 28250 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:03,785 INFO L93 Difference]: Finished difference Result 33084 states and 48004 transitions. [2023-04-03 02:54:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:54:03,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-03 02:54:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:03,812 INFO L225 Difference]: With dead ends: 33084 [2023-04-03 02:54:03,812 INFO L226 Difference]: Without dead ends: 18746 [2023-04-03 02:54:03,830 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 02:54:03,831 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 137 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:03,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 349 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:54:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18746 states. [2023-04-03 02:54:08,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18746 to 18744. [2023-04-03 02:54:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18744 states, 18740 states have (on average 1.4457844183564568) internal successors, (27094), 18740 states have internal predecessors, (27094), 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 02:54:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18744 states to 18744 states and 27097 transitions. [2023-04-03 02:54:09,011 INFO L78 Accepts]: Start accepts. Automaton has 18744 states and 27097 transitions. Word has length 76 [2023-04-03 02:54:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:09,011 INFO L495 AbstractCegarLoop]: Abstraction has 18744 states and 27097 transitions. [2023-04-03 02:54:09,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:09,011 INFO L276 IsEmpty]: Start isEmpty. Operand 18744 states and 27097 transitions. [2023-04-03 02:54:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:54:09,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:09,012 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 02:54:09,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-03 02:54:09,012 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:09,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1211226221, now seen corresponding path program 1 times [2023-04-03 02:54:09,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:09,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412310195] [2023-04-03 02:54:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:09,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:10,305 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 02:54:10,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:10,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412310195] [2023-04-03 02:54:10,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412310195] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:10,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:10,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-03 02:54:10,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431179449] [2023-04-03 02:54:10,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:10,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-03 02:54:10,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-03 02:54:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-04-03 02:54:10,307 INFO L87 Difference]: Start difference. First operand 18744 states and 27097 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:18,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:18,393 INFO L93 Difference]: Finished difference Result 23244 states and 33488 transitions. [2023-04-03 02:54:18,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:54:18,393 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-03 02:54:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:18,426 INFO L225 Difference]: With dead ends: 23244 [2023-04-03 02:54:18,427 INFO L226 Difference]: Without dead ends: 23242 [2023-04-03 02:54:18,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=407, Invalid=1573, Unknown=0, NotChecked=0, Total=1980 [2023-04-03 02:54:18,437 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1119 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:18,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 1740 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:54:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23242 states. [2023-04-03 02:54:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23242 to 18750. [2023-04-03 02:54:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18750 states, 18746 states have (on average 1.4456950816174117) internal successors, (27101), 18746 states have internal predecessors, (27101), 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 02:54:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18750 states to 18750 states and 27104 transitions. [2023-04-03 02:54:23,937 INFO L78 Accepts]: Start accepts. Automaton has 18750 states and 27104 transitions. Word has length 77 [2023-04-03 02:54:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:23,937 INFO L495 AbstractCegarLoop]: Abstraction has 18750 states and 27104 transitions. [2023-04-03 02:54:23,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 18750 states and 27104 transitions. [2023-04-03 02:54:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:54:23,939 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:23,939 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 02:54:23,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-03 02:54:23,939 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:23,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:23,940 INFO L85 PathProgramCache]: Analyzing trace with hash 792486707, now seen corresponding path program 1 times [2023-04-03 02:54:23,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:23,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326310795] [2023-04-03 02:54:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:23,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:24,885 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 02:54:24,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:24,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326310795] [2023-04-03 02:54:24,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326310795] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:24,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:24,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:54:24,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120309174] [2023-04-03 02:54:24,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:24,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:54:24,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:24,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:54:24,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:54:24,886 INFO L87 Difference]: Start difference. First operand 18750 states and 27104 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 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 02:54:33,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:33,360 INFO L93 Difference]: Finished difference Result 26875 states and 38766 transitions. [2023-04-03 02:54:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:54:33,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 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 02:54:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:33,399 INFO L225 Difference]: With dead ends: 26875 [2023-04-03 02:54:33,399 INFO L226 Difference]: Without dead ends: 26873 [2023-04-03 02:54:33,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:54:33,406 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 746 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:33,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 2573 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:54:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26873 states.