/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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:06:17,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:06:17,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:06:17,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 03:06:17,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 03:06:17,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 03:06:17,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 03:06:17,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 03:06:17,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 03:06:17,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 03:06:17,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 03:06:17,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 03:06:17,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:06:17,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:06:17,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:06:17,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:06:17,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:06:17,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:06:17,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:06:17,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:06:17,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:06:17,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:06:17,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:06:17,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:06:17,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:06:17,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:06:17,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:06:17,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:06:17,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:06:17,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 03:06:17,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 03:06:17,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 03:06:17,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 03:06:17,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 03:06:17,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 03:06:17,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 03:06:17,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 03:06:17,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 03:06:17,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:06:17,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:06:17,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:06:17,702 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 03:06:17,723 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:06:17,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:06:17,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:06:17,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:06:17,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:06:17,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:06:17,725 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:06:17,725 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:06:17,725 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:06:17,725 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:06:17,726 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:06:17,726 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:06:17,726 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:06:17,726 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:06:17,726 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:06:17,726 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:06:17,726 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:06:17,726 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:06:17,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:06:17,727 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:06:17,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:06:17,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:06:17,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:06:17,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:06:17,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:06:17,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:06:17,727 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:06:17,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:06:17,728 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:06:17,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:06:17,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:06:17,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:06:17,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:06:17,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:06:17,728 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:06:17,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:06:17,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:06:17,729 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:06:17,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:06:17,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:06:17,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:06:17,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:06:17,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:06:17,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:06:17,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:06:17,923 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:06:17,923 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:06:17,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:06:18,930 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:06:19,060 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:06:19,061 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:06:19,067 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05e764da1/2febde6a4ac04223b1afab8d35ee9e67/FLAG0bf48e97b [2023-04-03 03:06:19,077 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05e764da1/2febde6a4ac04223b1afab8d35ee9e67 [2023-04-03 03:06:19,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:06:19,080 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:06:19,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:06:19,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:06:19,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:06:19,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49579d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19, skipping insertion in model container [2023-04-03 03:06:19,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:06:19,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:06:19,258 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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5807,5820] [2023-04-03 03:06:19,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:06:19,302 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:06:19,328 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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5807,5820] [2023-04-03 03:06:19,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:06:19,353 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:06:19,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19 WrapperNode [2023-04-03 03:06:19,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:06:19,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:06:19,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:06:19,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:06:19,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,391 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:06:19,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:06:19,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:06:19,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:06:19,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19" (1/1) ... [2023-04-03 03:06:19,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:06:19,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:06:19,421 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 03:06:19,425 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 03:06:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:06:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:06:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:06:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:06:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:06:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:06:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:06:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:06:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:06:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:06:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:06:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:06:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:06:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:06:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:06:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:06:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:06:19,562 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:06:19,566 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:06:19,921 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:06:20,014 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:06:20,014 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:06:20,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:06:20 BoogieIcfgContainer [2023-04-03 03:06:20,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:06:20,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:06:20,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:06:20,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:06:20,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:06:19" (1/3) ... [2023-04-03 03:06:20,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20aca824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:06:20, skipping insertion in model container [2023-04-03 03:06:20,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:06:19" (2/3) ... [2023-04-03 03:06:20,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20aca824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:06:20, skipping insertion in model container [2023-04-03 03:06:20,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:06:20" (3/3) ... [2023-04-03 03:06:20,022 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:06:20,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:06:20,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:06:20,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:06:20,091 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;@3c08c80d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:06:20,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:06:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 76 states have internal predecessors, (127), 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 03:06:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 03:06:20,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:20,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:20,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:20,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash 326443, now seen corresponding path program 1 times [2023-04-03 03:06:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:20,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288888597] [2023-04-03 03:06:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:20,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:20,421 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 03:06:20,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:20,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288888597] [2023-04-03 03:06:20,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288888597] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:20,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:20,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:06:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059267966] [2023-04-03 03:06:20,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:20,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:06:20,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:06:20,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:06:20,449 INFO L87 Difference]: Start difference. First operand has 81 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 76 states have internal predecessors, (127), 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 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:06:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:20,547 INFO L93 Difference]: Finished difference Result 165 states and 249 transitions. [2023-04-03 03:06:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:06:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-04-03 03:06:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:20,555 INFO L225 Difference]: With dead ends: 165 [2023-04-03 03:06:20,556 INFO L226 Difference]: Without dead ends: 111 [2023-04-03 03:06:20,558 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 03:06:20,560 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 87 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:20,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 226 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:06:20,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-03 03:06:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2023-04-03 03:06:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.3333333333333333) internal successors, (140), 105 states have internal predecessors, (140), 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 03:06:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2023-04-03 03:06:20,592 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 52 [2023-04-03 03:06:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:20,593 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2023-04-03 03:06:20,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:06:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2023-04-03 03:06:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 03:06:20,594 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:20,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:20,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:06:20,595 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:20,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1597040385, now seen corresponding path program 1 times [2023-04-03 03:06:20,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:20,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055091529] [2023-04-03 03:06:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:20,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:20,711 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 03:06:20,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:20,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055091529] [2023-04-03 03:06:20,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055091529] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:20,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:20,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:06:20,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250759093] [2023-04-03 03:06:20,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:20,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:06:20,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:20,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:06:20,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:06:20,714 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 03:06:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:20,761 INFO L93 Difference]: Finished difference Result 245 states and 343 transitions. [2023-04-03 03:06:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:06:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 55 [2023-04-03 03:06:20,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:20,763 INFO L225 Difference]: With dead ends: 245 [2023-04-03 03:06:20,763 INFO L226 Difference]: Without dead ends: 173 [2023-04-03 03:06:20,763 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 03:06:20,764 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 51 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:20,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 177 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:06:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-04-03 03:06:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2023-04-03 03:06:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.3832335329341316) internal successors, (231), 167 states have internal predecessors, (231), 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 03:06:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 234 transitions. [2023-04-03 03:06:20,786 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 234 transitions. Word has length 55 [2023-04-03 03:06:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:20,787 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 234 transitions. [2023-04-03 03:06:20,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 03:06:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 234 transitions. [2023-04-03 03:06:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 03:06:20,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:20,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:20,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:06:20,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:20,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1651248739, now seen corresponding path program 1 times [2023-04-03 03:06:20,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:20,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663813960] [2023-04-03 03:06:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:20,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:20,931 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 03:06:20,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:20,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663813960] [2023-04-03 03:06:20,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663813960] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:20,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:20,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:06:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891698980] [2023-04-03 03:06:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:06:20,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:06:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:06:20,933 INFO L87 Difference]: Start difference. First operand 171 states and 234 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 03:06:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:20,979 INFO L93 Difference]: Finished difference Result 423 states and 604 transitions. [2023-04-03 03:06:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:06:20,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 58 [2023-04-03 03:06:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:20,982 INFO L225 Difference]: With dead ends: 423 [2023-04-03 03:06:20,982 INFO L226 Difference]: Without dead ends: 289 [2023-04-03 03:06:20,983 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 03:06:20,984 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 46 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:20,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 173 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:06:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-04-03 03:06:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2023-04-03 03:06:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 283 states have (on average 1.4098939929328622) internal successors, (399), 283 states have internal predecessors, (399), 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 03:06:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 402 transitions. [2023-04-03 03:06:21,014 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 402 transitions. Word has length 58 [2023-04-03 03:06:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:21,015 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 402 transitions. [2023-04-03 03:06:21,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 03:06:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 402 transitions. [2023-04-03 03:06:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 03:06:21,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:21,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:21,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:06:21,016 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:21,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:21,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1270759560, now seen corresponding path program 1 times [2023-04-03 03:06:21,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:21,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476592049] [2023-04-03 03:06:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:21,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:21,072 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 03:06:21,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:21,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476592049] [2023-04-03 03:06:21,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476592049] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:21,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:21,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:06:21,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606953586] [2023-04-03 03:06:21,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:21,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:06:21,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:21,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:06:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:06:21,075 INFO L87 Difference]: Start difference. First operand 287 states and 402 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 03:06:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:21,150 INFO L93 Difference]: Finished difference Result 755 states and 1084 transitions. [2023-04-03 03:06:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:06:21,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 61 [2023-04-03 03:06:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:21,154 INFO L225 Difference]: With dead ends: 755 [2023-04-03 03:06:21,154 INFO L226 Difference]: Without dead ends: 505 [2023-04-03 03:06:21,157 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 03:06:21,164 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:21,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 169 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:06:21,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-04-03 03:06:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 503. [2023-04-03 03:06:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 499 states have (on average 1.4168336673346693) internal successors, (707), 499 states have internal predecessors, (707), 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 03:06:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 710 transitions. [2023-04-03 03:06:21,240 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 710 transitions. Word has length 61 [2023-04-03 03:06:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:21,241 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 710 transitions. [2023-04-03 03:06:21,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 03:06:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 710 transitions. [2023-04-03 03:06:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 03:06:21,247 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:21,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:21,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:06:21,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:21,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash 250055778, now seen corresponding path program 1 times [2023-04-03 03:06:21,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:21,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322177282] [2023-04-03 03:06:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:21,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:21,350 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 03:06:21,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:21,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322177282] [2023-04-03 03:06:21,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322177282] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:21,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:21,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:06:21,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806635844] [2023-04-03 03:06:21,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:21,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:06:21,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:21,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:06:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:06:21,352 INFO L87 Difference]: Start difference. First operand 503 states and 710 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 03:06:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:21,475 INFO L93 Difference]: Finished difference Result 1371 states and 1960 transitions. [2023-04-03 03:06:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:06:21,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 64 [2023-04-03 03:06:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:21,481 INFO L225 Difference]: With dead ends: 1371 [2023-04-03 03:06:21,481 INFO L226 Difference]: Without dead ends: 905 [2023-04-03 03:06:21,483 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 03:06:21,485 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 36 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:21,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:06:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2023-04-03 03:06:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 903. [2023-04-03 03:06:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 899 states have (on average 1.4093437152391546) internal successors, (1267), 899 states have internal predecessors, (1267), 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 03:06:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1270 transitions. [2023-04-03 03:06:21,593 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1270 transitions. Word has length 64 [2023-04-03 03:06:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:21,593 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1270 transitions. [2023-04-03 03:06:21,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 03:06:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1270 transitions. [2023-04-03 03:06:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 03:06:21,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:21,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:21,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:06:21,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:21,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:21,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2030654792, now seen corresponding path program 1 times [2023-04-03 03:06:21,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:21,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139657127] [2023-04-03 03:06:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:21,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:21,750 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 03:06:21,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:21,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139657127] [2023-04-03 03:06:21,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139657127] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:21,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:21,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 03:06:21,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153850797] [2023-04-03 03:06:21,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:21,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 03:06:21,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:21,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 03:06:21,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:06:21,752 INFO L87 Difference]: Start difference. First operand 903 states and 1270 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:06:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:22,234 INFO L93 Difference]: Finished difference Result 3695 states and 5253 transitions. [2023-04-03 03:06:22,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 03:06:22,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-03 03:06:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:22,245 INFO L225 Difference]: With dead ends: 3695 [2023-04-03 03:06:22,245 INFO L226 Difference]: Without dead ends: 2829 [2023-04-03 03:06:22,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-03 03:06:22,248 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 558 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:22,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1330 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:06:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2023-04-03 03:06:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 1251. [2023-04-03 03:06:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1247 states have (on average 1.396952686447474) internal successors, (1742), 1247 states have internal predecessors, (1742), 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 03:06:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1745 transitions. [2023-04-03 03:06:22,392 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1745 transitions. Word has length 67 [2023-04-03 03:06:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:22,393 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1745 transitions. [2023-04-03 03:06:22,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:06:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1745 transitions. [2023-04-03 03:06:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 03:06:22,395 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:22,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:22,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:06:22,396 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:22,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:22,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1857672883, now seen corresponding path program 1 times [2023-04-03 03:06:22,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:22,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399913517] [2023-04-03 03:06:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:22,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:06:22,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:22,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399913517] [2023-04-03 03:06:22,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399913517] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:22,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:22,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:06:22,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62999992] [2023-04-03 03:06:22,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:22,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:06:22,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:22,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:06:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:06:22,480 INFO L87 Difference]: Start difference. First operand 1251 states and 1745 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 03:06:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:22,706 INFO L93 Difference]: Finished difference Result 3185 states and 4491 transitions. [2023-04-03 03:06:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:06:22,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-03 03:06:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:22,712 INFO L225 Difference]: With dead ends: 3185 [2023-04-03 03:06:22,713 INFO L226 Difference]: Without dead ends: 1971 [2023-04-03 03:06:22,715 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 03:06:22,715 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 30 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:22,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 137 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:06:22,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2023-04-03 03:06:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1969. [2023-04-03 03:06:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.4055979643765903) internal successors, (2762), 1965 states have internal predecessors, (2762), 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 03:06:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2765 transitions. [2023-04-03 03:06:22,930 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2765 transitions. Word has length 69 [2023-04-03 03:06:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:22,930 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2765 transitions. [2023-04-03 03:06:22,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 03:06:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2765 transitions. [2023-04-03 03:06:22,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 03:06:22,931 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:22,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:22,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:06:22,931 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:22,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:22,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1877722226, now seen corresponding path program 1 times [2023-04-03 03:06:22,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:22,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228543784] [2023-04-03 03:06:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:22,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:23,166 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 03:06:23,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:23,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228543784] [2023-04-03 03:06:23,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228543784] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:23,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:23,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 03:06:23,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477092614] [2023-04-03 03:06:23,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:23,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 03:06:23,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 03:06:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:06:23,173 INFO L87 Difference]: Start difference. First operand 1969 states and 2765 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 03:06:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:23,503 INFO L93 Difference]: Finished difference Result 3901 states and 5492 transitions. [2023-04-03 03:06:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 03:06:23,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-03 03:06:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:23,508 INFO L225 Difference]: With dead ends: 3901 [2023-04-03 03:06:23,508 INFO L226 Difference]: Without dead ends: 1971 [2023-04-03 03:06:23,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-04-03 03:06:23,511 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 136 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:23,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 308 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:06:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2023-04-03 03:06:23,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1969. [2023-04-03 03:06:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.4045801526717556) internal successors, (2760), 1965 states have internal predecessors, (2760), 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 03:06:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2763 transitions. [2023-04-03 03:06:23,717 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2763 transitions. Word has length 69 [2023-04-03 03:06:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:23,717 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2763 transitions. [2023-04-03 03:06:23,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 03:06:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2763 transitions. [2023-04-03 03:06:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 03:06:23,718 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:23,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:23,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:06:23,718 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:23,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:23,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1922062490, now seen corresponding path program 1 times [2023-04-03 03:06:23,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:23,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712632023] [2023-04-03 03:06:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:23,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:23,788 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 03:06:23,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:23,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712632023] [2023-04-03 03:06:23,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712632023] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:23,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:23,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:06:23,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090998436] [2023-04-03 03:06:23,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:23,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:06:23,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:06:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:06:23,790 INFO L87 Difference]: Start difference. First operand 1969 states and 2763 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 03:06:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:24,064 INFO L93 Difference]: Finished difference Result 3899 states and 5487 transitions. [2023-04-03 03:06:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:06:24,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 70 [2023-04-03 03:06:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:24,084 INFO L225 Difference]: With dead ends: 3899 [2023-04-03 03:06:24,085 INFO L226 Difference]: Without dead ends: 1969 [2023-04-03 03:06:24,088 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 03:06:24,089 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 212 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:24,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 71 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:06:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2023-04-03 03:06:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1969. [2023-04-03 03:06:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.3842239185750635) internal successors, (2720), 1965 states have internal predecessors, (2720), 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 03:06:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2723 transitions. [2023-04-03 03:06:24,363 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2723 transitions. Word has length 70 [2023-04-03 03:06:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:24,363 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2723 transitions. [2023-04-03 03:06:24,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 03:06:24,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2723 transitions. [2023-04-03 03:06:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 03:06:24,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:24,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:24,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:06:24,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:24,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:24,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1610041099, now seen corresponding path program 1 times [2023-04-03 03:06:24,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:24,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988594504] [2023-04-03 03:06:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:24,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:24,445 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 03:06:24,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:24,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988594504] [2023-04-03 03:06:24,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988594504] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:24,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:24,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:06:24,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492278546] [2023-04-03 03:06:24,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:24,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:06:24,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:24,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:06:24,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:06:24,447 INFO L87 Difference]: Start difference. First operand 1969 states and 2723 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 03:06:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:24,720 INFO L93 Difference]: Finished difference Result 3899 states and 5407 transitions. [2023-04-03 03:06:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:06:24,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 70 [2023-04-03 03:06:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:24,726 INFO L225 Difference]: With dead ends: 3899 [2023-04-03 03:06:24,726 INFO L226 Difference]: Without dead ends: 1969 [2023-04-03 03:06:24,728 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 03:06:24,729 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 196 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:24,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 79 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:06:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2023-04-03 03:06:24,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1969. [2023-04-03 03:06:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.36793893129771) internal successors, (2688), 1965 states have internal predecessors, (2688), 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 03:06:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2691 transitions. [2023-04-03 03:06:24,968 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2691 transitions. Word has length 70 [2023-04-03 03:06:24,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:24,969 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2691 transitions. [2023-04-03 03:06:24,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 03:06:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2691 transitions. [2023-04-03 03:06:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 03:06:24,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:24,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:24,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 03:06:24,969 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:24,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:24,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1738126406, now seen corresponding path program 1 times [2023-04-03 03:06:24,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:24,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682358332] [2023-04-03 03:06:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:24,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:25,047 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 03:06:25,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:25,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682358332] [2023-04-03 03:06:25,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682358332] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:25,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:25,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:06:25,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183224308] [2023-04-03 03:06:25,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:25,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:06:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:25,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:06:25,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:06:25,049 INFO L87 Difference]: Start difference. First operand 1969 states and 2691 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 03:06:25,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:25,416 INFO L93 Difference]: Finished difference Result 3899 states and 5343 transitions. [2023-04-03 03:06:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:06:25,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 70 [2023-04-03 03:06:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:25,422 INFO L225 Difference]: With dead ends: 3899 [2023-04-03 03:06:25,422 INFO L226 Difference]: Without dead ends: 1969 [2023-04-03 03:06:25,427 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 03:06:25,428 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 167 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:25,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 95 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:06:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2023-04-03 03:06:25,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1969. [2023-04-03 03:06:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.35470737913486) internal successors, (2662), 1965 states have internal predecessors, (2662), 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 03:06:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2665 transitions. [2023-04-03 03:06:25,679 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2665 transitions. Word has length 70 [2023-04-03 03:06:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:25,679 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2665 transitions. [2023-04-03 03:06:25,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 03:06:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2665 transitions. [2023-04-03 03:06:25,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 03:06:25,680 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:25,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:25,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:06:25,680 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:25,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1208835905, now seen corresponding path program 1 times [2023-04-03 03:06:25,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:25,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334327376] [2023-04-03 03:06:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:25,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:25,814 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 03:06:25,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:25,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334327376] [2023-04-03 03:06:25,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334327376] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:06:25,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:06:25,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:06:25,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731175038] [2023-04-03 03:06:25,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:06:25,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:06:25,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:06:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:06:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:06:25,816 INFO L87 Difference]: Start difference. First operand 1969 states and 2665 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:06:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:06:26,280 INFO L93 Difference]: Finished difference Result 3238 states and 4330 transitions. [2023-04-03 03:06:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 03:06:26,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-03 03:06:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:06:26,289 INFO L225 Difference]: With dead ends: 3238 [2023-04-03 03:06:26,289 INFO L226 Difference]: Without dead ends: 3236 [2023-04-03 03:06:26,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 03:06:26,292 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 95 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:06:26,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 411 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:06:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2023-04-03 03:06:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2033. [2023-04-03 03:06:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2029 states have (on average 1.3198620009857072) internal successors, (2678), 2029 states have internal predecessors, (2678), 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 03:06:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 2681 transitions. [2023-04-03 03:06:26,623 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 2681 transitions. Word has length 70 [2023-04-03 03:06:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:06:26,623 INFO L495 AbstractCegarLoop]: Abstraction has 2033 states and 2681 transitions. [2023-04-03 03:06:26,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:06:26,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 2681 transitions. [2023-04-03 03:06:26,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-03 03:06:26,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:06:26,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:06:26,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 03:06:26,625 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:06:26,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:06:26,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1124147290, now seen corresponding path program 1 times [2023-04-03 03:06:26,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:06:26,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157426489] [2023-04-03 03:06:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:26,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:06:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:06:32,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:32,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157426489] [2023-04-03 03:06:32,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157426489] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:06:32,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340493231] [2023-04-03 03:06:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:32,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:06:32,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:06:32,570 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 03:06:32,571 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 03:06:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:32,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 83 conjunts are in the unsatisfiable core [2023-04-03 03:06:32,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:06:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:06:46,092 INFO L327 TraceCheckSpWp]: Computing backward predicates...