/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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:31:16,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:31:16,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:31:16,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:31:16,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:31:16,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:31:16,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:31:16,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:31:16,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:31:16,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:31:16,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:31:16,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:31:16,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:31:16,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:31:16,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:31:16,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:31:16,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:31:16,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:31:16,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:31:16,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:31:16,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:31:16,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:31:16,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:31:16,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:31:16,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-03 02:31:16,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:31:16,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:31:16,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:31:16,519 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 02:31:16,546 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:31:16,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:31:16,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:31:16,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:31:16,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:31:16,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:31:16,548 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:31:16,548 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:31:16,548 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:31:16,548 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:31:16,549 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:31:16,549 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:31:16,549 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:31:16,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:31:16,549 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:31:16,549 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:31:16,549 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:31:16,549 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:31:16,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:31:16,550 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:31:16,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:31:16,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:31:16,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:31:16,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:31:16,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:31:16,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:31:16,551 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:31:16,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:31:16,551 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:31:16,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:31:16,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:31:16,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:31:16,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:31:16,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:31:16,552 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:31:16,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:31:16,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:31:16,552 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:31:16,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:31:16,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:31:16,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:31:16,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:31:16,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:31:16,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:31:16,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:31:16,789 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:31:16,789 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:31:16,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:31:17,855 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:31:18,054 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:31:18,055 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:31:18,070 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c78fa78/3476533478ad43e4b6c243c12a6a8e50/FLAG3dc59361b [2023-04-03 02:31:18,083 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c78fa78/3476533478ad43e4b6c243c12a6a8e50 [2023-04-03 02:31:18,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:31:18,086 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:31:18,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:31:18,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:31:18,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:31:18,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2add88c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18, skipping insertion in model container [2023-04-03 02:31:18,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:31:18,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:31:18,285 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2023-04-03 02:31:18,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:31:18,324 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:31:18,352 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2023-04-03 02:31:18,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:31:18,378 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:31:18,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18 WrapperNode [2023-04-03 02:31:18,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:31:18,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:31:18,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:31:18,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:31:18,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,409 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:31:18,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:31:18,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:31:18,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:31:18,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18" (1/1) ... [2023-04-03 02:31:18,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:31:18,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:31:18,446 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 02:31:18,471 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 02:31:18,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:31:18,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:31:18,493 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:31:18,493 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:31:18,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:31:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:31:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:31:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:31:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:31:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:31:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:31:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:31:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:31:18,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:31:18,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:31:18,627 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:31:18,629 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:31:18,926 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:31:18,998 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:31:18,998 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:31:19,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:31:19 BoogieIcfgContainer [2023-04-03 02:31:19,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:31:19,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:31:19,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:31:19,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:31:19,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:31:18" (1/3) ... [2023-04-03 02:31:19,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666f144c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:31:19, skipping insertion in model container [2023-04-03 02:31:19,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:18" (2/3) ... [2023-04-03 02:31:19,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666f144c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:31:19, skipping insertion in model container [2023-04-03 02:31:19,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:31:19" (3/3) ... [2023-04-03 02:31:19,007 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:31:19,020 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:31:19,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:31:19,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:31:19,079 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;@71beff1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:31:19,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:31:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 64 states have (on average 1.65625) internal successors, (106), 65 states have internal predecessors, (106), 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 02:31:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-03 02:31:19,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:19,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:19,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:19,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:19,096 INFO L85 PathProgramCache]: Analyzing trace with hash 148092094, now seen corresponding path program 1 times [2023-04-03 02:31:19,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:19,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851142726] [2023-04-03 02:31:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:19,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:19,387 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 02:31:19,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:19,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851142726] [2023-04-03 02:31:19,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851142726] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:19,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:19,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:31:19,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914954054] [2023-04-03 02:31:19,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:19,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:31:19,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:19,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:31:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:19,415 INFO L87 Difference]: Start difference. First operand has 70 states, 64 states have (on average 1.65625) internal successors, (106), 65 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 02:31:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:19,496 INFO L93 Difference]: Finished difference Result 153 states and 231 transitions. [2023-04-03 02:31:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:31:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2023-04-03 02:31:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:19,505 INFO L225 Difference]: With dead ends: 153 [2023-04-03 02:31:19,505 INFO L226 Difference]: Without dead ends: 98 [2023-04-03 02:31:19,508 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 02:31:19,510 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 79 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:19,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 204 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:31:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-03 02:31:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-04-03 02:31:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.4021739130434783) internal successors, (129), 92 states have internal predecessors, (129), 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 02:31:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2023-04-03 02:31:19,573 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 32 [2023-04-03 02:31:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:19,574 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2023-04-03 02:31:19,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 02:31:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2023-04-03 02:31:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 02:31:19,575 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:19,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:19,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:31:19,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:19,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2117687285, now seen corresponding path program 1 times [2023-04-03 02:31:19,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:19,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978404618] [2023-04-03 02:31:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:19,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:19,726 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 02:31:19,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:19,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978404618] [2023-04-03 02:31:19,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978404618] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:19,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:19,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:31:19,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961687970] [2023-04-03 02:31:19,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:19,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:31:19,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:31:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:19,729 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 02:31:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:19,773 INFO L93 Difference]: Finished difference Result 220 states and 316 transitions. [2023-04-03 02:31:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:31:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2023-04-03 02:31:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:19,775 INFO L225 Difference]: With dead ends: 220 [2023-04-03 02:31:19,775 INFO L226 Difference]: Without dead ends: 147 [2023-04-03 02:31:19,776 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 02:31:19,777 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 58 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:19,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 155 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:31:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-03 02:31:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2023-04-03 02:31:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.425531914893617) internal successors, (201), 141 states have internal predecessors, (201), 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 02:31:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 204 transitions. [2023-04-03 02:31:19,796 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 204 transitions. Word has length 35 [2023-04-03 02:31:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:19,796 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 204 transitions. [2023-04-03 02:31:19,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 02:31:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 204 transitions. [2023-04-03 02:31:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-03 02:31:19,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:19,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:19,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:31:19,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:19,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash 692722299, now seen corresponding path program 1 times [2023-04-03 02:31:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:19,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724791174] [2023-04-03 02:31:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:19,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:19,853 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 02:31:19,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:19,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724791174] [2023-04-03 02:31:19,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724791174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:19,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:19,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:31:19,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041669235] [2023-04-03 02:31:19,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:19,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:31:19,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:19,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:31:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:19,855 INFO L87 Difference]: Start difference. First operand 145 states and 204 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 02:31:19,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:19,898 INFO L93 Difference]: Finished difference Result 345 states and 498 transitions. [2023-04-03 02:31:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:31:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2023-04-03 02:31:19,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:19,901 INFO L225 Difference]: With dead ends: 345 [2023-04-03 02:31:19,901 INFO L226 Difference]: Without dead ends: 223 [2023-04-03 02:31:19,902 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 02:31:19,903 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:19,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 140 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:31:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-04-03 02:31:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2023-04-03 02:31:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.423963133640553) internal successors, (309), 217 states have internal predecessors, (309), 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 02:31:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 312 transitions. [2023-04-03 02:31:19,934 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 312 transitions. Word has length 38 [2023-04-03 02:31:19,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:19,934 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 312 transitions. [2023-04-03 02:31:19,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 02:31:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 312 transitions. [2023-04-03 02:31:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-03 02:31:19,941 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:19,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:19,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:31:19,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:19,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1636378340, now seen corresponding path program 1 times [2023-04-03 02:31:19,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:19,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684959955] [2023-04-03 02:31:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:19,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:20,092 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 02:31:20,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:20,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684959955] [2023-04-03 02:31:20,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684959955] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:20,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:20,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:20,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610761859] [2023-04-03 02:31:20,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:20,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:20,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:20,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:20,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:20,095 INFO L87 Difference]: Start difference. First operand 221 states and 312 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:20,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:20,252 INFO L93 Difference]: Finished difference Result 707 states and 1011 transitions. [2023-04-03 02:31:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:20,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-03 02:31:20,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:20,254 INFO L225 Difference]: With dead ends: 707 [2023-04-03 02:31:20,255 INFO L226 Difference]: Without dead ends: 509 [2023-04-03 02:31:20,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:20,266 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 162 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:20,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 274 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:31:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-04-03 02:31:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 505. [2023-04-03 02:31:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.4231536926147705) internal successors, (713), 501 states have internal predecessors, (713), 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 02:31:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 716 transitions. [2023-04-03 02:31:20,376 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 716 transitions. Word has length 41 [2023-04-03 02:31:20,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:20,377 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 716 transitions. [2023-04-03 02:31:20,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:20,378 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 716 transitions. [2023-04-03 02:31:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:31:20,379 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:20,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:20,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:31:20,379 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:20,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:20,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1159174075, now seen corresponding path program 1 times [2023-04-03 02:31:20,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:20,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602466081] [2023-04-03 02:31:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:20,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:20,490 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 02:31:20,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:20,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602466081] [2023-04-03 02:31:20,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602466081] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:20,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:20,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:20,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794092383] [2023-04-03 02:31:20,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:20,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:20,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:20,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:20,493 INFO L87 Difference]: Start difference. First operand 505 states and 716 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 02:31:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:20,757 INFO L93 Difference]: Finished difference Result 1287 states and 1850 transitions. [2023-04-03 02:31:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 43 [2023-04-03 02:31:20,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:20,764 INFO L225 Difference]: With dead ends: 1287 [2023-04-03 02:31:20,764 INFO L226 Difference]: Without dead ends: 805 [2023-04-03 02:31:20,765 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 02:31:20,768 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 336 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:20,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 89 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:31:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2023-04-03 02:31:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 803. [2023-04-03 02:31:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 799 states have (on average 1.4180225281602004) internal successors, (1133), 799 states have internal predecessors, (1133), 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 02:31:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1136 transitions. [2023-04-03 02:31:20,919 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1136 transitions. Word has length 43 [2023-04-03 02:31:20,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:20,920 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1136 transitions. [2023-04-03 02:31:20,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 02:31:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1136 transitions. [2023-04-03 02:31:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:31:20,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:20,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:20,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:31:20,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:20,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:20,922 INFO L85 PathProgramCache]: Analyzing trace with hash 535323318, now seen corresponding path program 1 times [2023-04-03 02:31:20,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:20,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262999674] [2023-04-03 02:31:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:20,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:21,354 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 02:31:21,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:21,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262999674] [2023-04-03 02:31:21,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262999674] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:21,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:21,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:31:21,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351704253] [2023-04-03 02:31:21,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:21,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:31:21,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:31:21,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:31:21,356 INFO L87 Difference]: Start difference. First operand 803 states and 1136 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:21,765 INFO L93 Difference]: Finished difference Result 1482 states and 2099 transitions. [2023-04-03 02:31:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:31:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-04-03 02:31:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:21,772 INFO L225 Difference]: With dead ends: 1482 [2023-04-03 02:31:21,772 INFO L226 Difference]: Without dead ends: 1480 [2023-04-03 02:31:21,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:31:21,775 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 501 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:21,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 670 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:31:21,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-04-03 02:31:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 940. [2023-04-03 02:31:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 936 states have (on average 1.4166666666666667) internal successors, (1326), 936 states have internal predecessors, (1326), 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 02:31:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1329 transitions. [2023-04-03 02:31:21,952 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1329 transitions. Word has length 43 [2023-04-03 02:31:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:21,954 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1329 transitions. [2023-04-03 02:31:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1329 transitions. [2023-04-03 02:31:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:31:21,955 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:21,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:21,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:31:21,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:21,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash -706550833, now seen corresponding path program 1 times [2023-04-03 02:31:21,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:21,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131406372] [2023-04-03 02:31:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:21,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:22,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:22,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131406372] [2023-04-03 02:31:22,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131406372] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:31:22,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581261596] [2023-04-03 02:31:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:22,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:31:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:31:22,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:31:22,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:31:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:22,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-03 02:31:22,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:31:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:23,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:31:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:31:26,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581261596] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:31:26,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1622570655] [2023-04-03 02:31:26,671 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-04-03 02:31:26,671 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:31:26,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:31:26,678 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:31:26,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:31:27,122 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 120 for LOIs [2023-04-03 02:31:50,360 WARN L223 SmtUtils]: Spent 21.70s on a formula simplification. DAG size of input: 6195 DAG size of output: 269 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:31:56,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 103 for LOIs [2023-04-03 02:31:56,437 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:32:04,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11391#(and (= ~nomsg~0 ~p1_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (= ~nomsg~0 ~p2_old~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (= main_~main__c1~0 0) (= ~__return_6448~0 main_~check__tmp~0) (= main_~__tmp_1~0 0) (= ~nomsg~0 ~p2_new~0) (<= ~mode1~0 1) (or (< 1 (+ ~st3~0 ~st2~0 ~st1~0)) (and (<= 3 ~r1~0) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (= main_~main__c1~0 ~__return_6448~0) (= ~p3_old~0 ~nomsg~0) (<= 0 ~mode2~0) (= main_~__tmp_1~0 main_~assert__arg~0))' at error location [2023-04-03 02:32:04,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 02:32:04,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:32:04,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 40 [2023-04-03 02:32:04,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657605092] [2023-04-03 02:32:04,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 02:32:04,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-03 02:32:04,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-03 02:32:04,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=5645, Unknown=0, NotChecked=0, Total=6480 [2023-04-03 02:32:04,295 INFO L87 Difference]: Start difference. First operand 940 states and 1329 transitions. Second operand has 40 states, 40 states have (on average 3.45) internal successors, (138), 40 states have internal predecessors, (138), 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 02:32:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:24,679 INFO L93 Difference]: Finished difference Result 10546 states and 14899 transitions. [2023-04-03 02:32:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2023-04-03 02:32:24,679 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.45) internal successors, (138), 40 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-03 02:32:24,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:24,705 INFO L225 Difference]: With dead ends: 10546 [2023-04-03 02:32:24,706 INFO L226 Difference]: Without dead ends: 9657 [2023-04-03 02:32:24,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23266 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=8245, Invalid=48161, Unknown=0, NotChecked=0, Total=56406 [2023-04-03 02:32:24,720 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 7020 mSDsluCounter, 2850 mSDsCounter, 0 mSdLazyCounter, 3949 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7020 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 4364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 3949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:24,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7020 Valid, 3000 Invalid, 4364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 3949 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-03 02:32:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9657 states. [2023-04-03 02:32:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9657 to 4681. [2023-04-03 02:32:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4677 states have (on average 1.3769510369895233) internal successors, (6440), 4677 states have internal predecessors, (6440), 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 02:32:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 6443 transitions. [2023-04-03 02:32:25,927 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 6443 transitions. Word has length 51 [2023-04-03 02:32:25,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:25,927 INFO L495 AbstractCegarLoop]: Abstraction has 4681 states and 6443 transitions. [2023-04-03 02:32:25,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.45) internal successors, (138), 40 states have internal predecessors, (138), 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 02:32:25,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 6443 transitions. [2023-04-03 02:32:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:32:25,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:25,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:25,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 02:32:26,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:32:26,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:26,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:26,136 INFO L85 PathProgramCache]: Analyzing trace with hash -114097242, now seen corresponding path program 1 times [2023-04-03 02:32:26,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:26,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142145036] [2023-04-03 02:32:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:26,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:32:26,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:26,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142145036] [2023-04-03 02:32:26,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142145036] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:26,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:26,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:32:26,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982140506] [2023-04-03 02:32:26,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:26,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:32:26,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:26,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:32:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:32:26,207 INFO L87 Difference]: Start difference. First operand 4681 states and 6443 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:27,985 INFO L93 Difference]: Finished difference Result 11819 states and 16410 transitions. [2023-04-03 02:32:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:32:27,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-03 02:32:27,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:28,005 INFO L225 Difference]: With dead ends: 11819 [2023-04-03 02:32:28,006 INFO L226 Difference]: Without dead ends: 7211 [2023-04-03 02:32:28,011 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 02:32:28,011 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 317 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:28,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 99 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7211 states. [2023-04-03 02:32:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7211 to 7209. [2023-04-03 02:32:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7209 states, 7205 states have (on average 1.3761276891047884) internal successors, (9915), 7205 states have internal predecessors, (9915), 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 02:32:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7209 states to 7209 states and 9918 transitions. [2023-04-03 02:32:29,757 INFO L78 Accepts]: Start accepts. Automaton has 7209 states and 9918 transitions. Word has length 51 [2023-04-03 02:32:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:29,757 INFO L495 AbstractCegarLoop]: Abstraction has 7209 states and 9918 transitions. [2023-04-03 02:32:29,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7209 states and 9918 transitions. [2023-04-03 02:32:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:32:29,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:29,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:29,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:32:29,758 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:29,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:29,759 INFO L85 PathProgramCache]: Analyzing trace with hash -928509237, now seen corresponding path program 1 times [2023-04-03 02:32:29,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:29,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881789910] [2023-04-03 02:32:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:29,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:30,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:30,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881789910] [2023-04-03 02:32:30,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881789910] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:32:30,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816746032] [2023-04-03 02:32:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:30,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:32:30,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:32:30,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:32:30,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:32:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:30,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-03 02:32:30,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:32:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:31,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:32:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:33,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816746032] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:32:33,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785896857] [2023-04-03 02:32:33,424 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-04-03 02:32:33,424 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:32:33,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:32:33,425 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:32:33,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:32:33,675 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 120 for LOIs [2023-04-03 02:32:55,956 WARN L223 SmtUtils]: Spent 21.23s on a formula simplification. DAG size of input: 6195 DAG size of output: 269 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:33:01,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 103 for LOIs [2023-04-03 02:33:01,201 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:33:07,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67203#(and (= ~nomsg~0 ~p1_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (= main_~main__c1~0 0) (= ~__return_6448~0 main_~check__tmp~0) (= main_~__tmp_1~0 0) (= ~nomsg~0 ~p2_new~0) (= ~nomsg~0 ~p1_old~0) (<= ~mode1~0 1) (or (< 1 (+ ~st3~0 ~st2~0 ~st1~0)) (and (<= 3 ~r1~0) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (= main_~main__c1~0 ~__return_6448~0) (= ~p3_old~0 ~nomsg~0) (<= 0 ~mode2~0) (= main_~__tmp_1~0 main_~assert__arg~0))' at error location [2023-04-03 02:33:07,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 02:33:07,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:33:07,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 41 [2023-04-03 02:33:07,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019612350] [2023-04-03 02:33:07,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 02:33:07,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-03 02:33:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:07,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-03 02:33:07,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=894, Invalid=5912, Unknown=0, NotChecked=0, Total=6806 [2023-04-03 02:33:07,633 INFO L87 Difference]: Start difference. First operand 7209 states and 9918 transitions. Second operand has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:33:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:35,394 INFO L93 Difference]: Finished difference Result 39280 states and 54110 transitions. [2023-04-03 02:33:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2023-04-03 02:33:35,395 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-04-03 02:33:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:35,472 INFO L225 Difference]: With dead ends: 39280 [2023-04-03 02:33:35,472 INFO L226 Difference]: Without dead ends: 30766 [2023-04-03 02:33:35,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24860 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=8505, Invalid=49817, Unknown=0, NotChecked=0, Total=58322 [2023-04-03 02:33:35,494 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 7643 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 3792 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7643 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 4183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 3792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:35,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7643 Valid, 2609 Invalid, 4183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 3792 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-03 02:33:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30766 states. [2023-04-03 02:33:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30766 to 18648. [2023-04-03 02:33:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18648 states, 18644 states have (on average 1.3600085818493886) internal successors, (25356), 18644 states have internal predecessors, (25356), 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 02:33:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18648 states to 18648 states and 25359 transitions. [2023-04-03 02:33:41,503 INFO L78 Accepts]: Start accepts. Automaton has 18648 states and 25359 transitions. Word has length 51 [2023-04-03 02:33:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:41,504 INFO L495 AbstractCegarLoop]: Abstraction has 18648 states and 25359 transitions. [2023-04-03 02:33:41,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:33:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 18648 states and 25359 transitions. [2023-04-03 02:33:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:33:41,505 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:41,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:33:41,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 02:33:41,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-03 02:33:41,712 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:41,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash 530434850, now seen corresponding path program 1 times [2023-04-03 02:33:41,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:41,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799574105] [2023-04-03 02:33:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:41,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:33:41,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:41,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799574105] [2023-04-03 02:33:41,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799574105] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:41,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:41,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:33:41,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037287332] [2023-04-03 02:33:41,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:41,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:33:41,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:41,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:33:41,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:33:41,793 INFO L87 Difference]: Start difference. First operand 18648 states and 25359 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 02:33:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:50,402 INFO L93 Difference]: Finished difference Result 45540 states and 62297 transitions. [2023-04-03 02:33:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:33:50,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-03 02:33:50,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:50,463 INFO L225 Difference]: With dead ends: 45540 [2023-04-03 02:33:50,463 INFO L226 Difference]: Without dead ends: 27000 [2023-04-03 02:33:50,493 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 02:33:50,494 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 292 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:50,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 109 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:33:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27000 states. [2023-04-03 02:33:59,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27000 to 26880. [2023-04-03 02:33:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26880 states, 26876 states have (on average 1.357233219229052) internal successors, (36477), 26876 states have internal predecessors, (36477), 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 02:33:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26880 states to 26880 states and 36480 transitions. [2023-04-03 02:33:59,484 INFO L78 Accepts]: Start accepts. Automaton has 26880 states and 36480 transitions. Word has length 53 [2023-04-03 02:33:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:59,484 INFO L495 AbstractCegarLoop]: Abstraction has 26880 states and 36480 transitions. [2023-04-03 02:33:59,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 02:33:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 26880 states and 36480 transitions. [2023-04-03 02:33:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:33:59,485 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:59,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:33:59,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:33:59,486 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:59,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2138367779, now seen corresponding path program 1 times [2023-04-03 02:33:59,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:59,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878660355] [2023-04-03 02:33:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:59,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:34:00,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:00,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878660355] [2023-04-03 02:34:00,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878660355] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:34:00,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985794243] [2023-04-03 02:34:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:00,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:34:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:34:00,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:34:00,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:34:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:00,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-03 02:34:00,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:34:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:34:01,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:34:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:34:03,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985794243] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:34:03,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171819893] [2023-04-03 02:34:03,921 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-04-03 02:34:03,921 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:34:03,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:34:03,921 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:34:03,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:34:04,141 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 120 for LOIs [2023-04-03 02:34:27,422 WARN L223 SmtUtils]: Spent 22.24s on a formula simplification. DAG size of input: 6195 DAG size of output: 269 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:34:51,730 WARN L223 SmtUtils]: Spent 23.33s on a formula simplification. DAG size of input: 6501 DAG size of output: 319 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:35:21,061 WARN L223 SmtUtils]: Spent 28.30s on a formula simplification. DAG size of input: 7110 DAG size of output: 333 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:35:34,715 WARN L223 SmtUtils]: Spent 13.45s on a formula simplification. DAG size of input: 5171 DAG size of output: 364 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)