/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_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:27:18,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:27:18,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:27:18,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:27:18,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:27:18,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:27:18,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:27:18,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:27:18,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:27:18,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:27:18,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:27:18,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:27:18,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:27:18,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:27:18,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:27:18,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:27:18,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:27:18,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:27:18,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:27:18,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:27:18,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:27:18,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:27:18,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:27:18,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:27:18,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:27:18,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:27:18,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:27:18,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:27:18,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:27:18,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:27:18,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:27:18,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:27:18,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:27:18,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:27:18,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:27:18,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:27:18,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:27:18,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:27:18,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:27:18,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:27:18,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:27:18,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:27:18,857 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:27:18,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:27:18,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:27:18,858 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:27:18,859 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:27:18,859 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:27:18,859 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:27:18,860 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:27:18,860 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:27:18,860 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:27:18,861 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:27:18,861 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:27:18,861 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:27:18,861 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:27:18,861 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:27:18,862 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:27:18,862 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:27:18,862 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:27:18,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:27:18,863 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:27:18,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:27:18,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:27:18,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:27:18,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:27:18,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:27:18,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:27:18,864 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:27:18,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:27:18,864 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:27:18,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:27:18,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:27:18,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:27:18,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:27:18,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:27:18,865 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:27:18,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:27:18,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:27:18,866 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:27:18,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:27:18,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:27:18,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:27:18,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:27:19,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:27:19,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:27:19,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:27:19,098 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:27:19,098 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:27:19,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:27:20,259 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:27:20,498 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:27:20,498 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:27:20,513 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3979583c4/eff35c1da15944e899e0ddd9e17b277a/FLAG5fb79c8d7 [2023-04-03 02:27:20,526 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3979583c4/eff35c1da15944e899e0ddd9e17b277a [2023-04-03 02:27:20,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:27:20,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:27:20,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:27:20,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:27:20,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:27:20,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:27:20" (1/1) ... [2023-04-03 02:27:20,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f07e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:20, skipping insertion in model container [2023-04-03 02:27:20,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:27:20" (1/1) ... [2023-04-03 02:27:20,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:27:20,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:27:20,800 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_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2023-04-03 02:27:20,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:27:20,912 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:27:20,980 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_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2023-04-03 02:27:21,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:27:21,044 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:27:21,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21 WrapperNode [2023-04-03 02:27:21,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:27:21,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:27:21,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:27:21,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:27:21,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21" (1/1) ... [2023-04-03 02:27:21,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21" (1/1) ... [2023-04-03 02:27:21,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21" (1/1) ... [2023-04-03 02:27:21,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21" (1/1) ... [2023-04-03 02:27:21,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21" (1/1) ... [2023-04-03 02:27:21,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21" (1/1) ... [2023-04-03 02:27:21,119 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21" (1/1) ... [2023-04-03 02:27:21,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21" (1/1) ... [2023-04-03 02:27:21,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:27:21,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:27:21,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:27:21,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:27:21,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21" (1/1) ... [2023-04-03 02:27:21,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:27:21,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:27:21,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:27:21,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:27:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:27:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:27:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:27:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:27:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:27:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:27:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:27:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:27:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:27:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:27:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:27:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:27:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:27:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:27:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:27:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:27:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:27:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:27:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:27:21,461 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:27:21,463 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:27:22,406 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:27:22,690 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:27:22,690 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:27:22,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:27:22 BoogieIcfgContainer [2023-04-03 02:27:22,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:27:22,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:27:22,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:27:22,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:27:22,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:27:20" (1/3) ... [2023-04-03 02:27:22,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0200af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:27:22, skipping insertion in model container [2023-04-03 02:27:22,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:27:21" (2/3) ... [2023-04-03 02:27:22,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0200af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:27:22, skipping insertion in model container [2023-04-03 02:27:22,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:27:22" (3/3) ... [2023-04-03 02:27:22,706 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:27:22,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:27:22,722 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:27:22,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:27:22,789 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;@3b862cde, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:27:22,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:27:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 268 states, 255 states have (on average 1.6784313725490196) internal successors, (428), 263 states have internal predecessors, (428), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:27:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-03 02:27:22,819 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:22,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:22,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:22,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:22,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2091043506, now seen corresponding path program 1 times [2023-04-03 02:27:22,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:22,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970528360] [2023-04-03 02:27:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:22,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:23,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:23,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970528360] [2023-04-03 02:27:23,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970528360] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:23,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:23,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:23,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847506755] [2023-04-03 02:27:23,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:23,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:23,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:23,581 INFO L87 Difference]: Start difference. First operand has 268 states, 255 states have (on average 1.6784313725490196) internal successors, (428), 263 states have internal predecessors, (428), 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 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:23,787 INFO L93 Difference]: Finished difference Result 451 states and 703 transitions. [2023-04-03 02:27:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:23,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 105 [2023-04-03 02:27:23,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:23,806 INFO L225 Difference]: With dead ends: 451 [2023-04-03 02:27:23,807 INFO L226 Difference]: Without dead ends: 329 [2023-04-03 02:27:23,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:23,816 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 152 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:23,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 875 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-04-03 02:27:23,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2023-04-03 02:27:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 323 states have (on average 1.498452012383901) internal successors, (484), 323 states have internal predecessors, (484), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 487 transitions. [2023-04-03 02:27:23,906 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 487 transitions. Word has length 105 [2023-04-03 02:27:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:23,907 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 487 transitions. [2023-04-03 02:27:23,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 487 transitions. [2023-04-03 02:27:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-03 02:27:23,909 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:23,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:23,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:27:23,910 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:23,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1495409917, now seen corresponding path program 1 times [2023-04-03 02:27:23,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:23,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169270701] [2023-04-03 02:27:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:23,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:24,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:24,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169270701] [2023-04-03 02:27:24,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169270701] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:24,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:24,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:24,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194752022] [2023-04-03 02:27:24,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:24,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:24,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:24,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:24,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:24,180 INFO L87 Difference]: Start difference. First operand 327 states and 487 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:24,305 INFO L93 Difference]: Finished difference Result 575 states and 872 transitions. [2023-04-03 02:27:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2023-04-03 02:27:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:24,316 INFO L225 Difference]: With dead ends: 575 [2023-04-03 02:27:24,316 INFO L226 Difference]: Without dead ends: 416 [2023-04-03 02:27:24,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:24,325 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 133 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:24,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 648 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:24,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-04-03 02:27:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2023-04-03 02:27:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 410 states have (on average 1.5048780487804878) internal successors, (617), 410 states have internal predecessors, (617), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 620 transitions. [2023-04-03 02:27:24,353 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 620 transitions. Word has length 107 [2023-04-03 02:27:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:24,356 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 620 transitions. [2023-04-03 02:27:24,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 620 transitions. [2023-04-03 02:27:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-03 02:27:24,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:24,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:24,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:27:24,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:24,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:24,363 INFO L85 PathProgramCache]: Analyzing trace with hash -59241581, now seen corresponding path program 1 times [2023-04-03 02:27:24,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:24,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586222493] [2023-04-03 02:27:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:24,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:24,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:24,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586222493] [2023-04-03 02:27:24,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586222493] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:24,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:24,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:24,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977046655] [2023-04-03 02:27:24,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:24,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:24,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:24,576 INFO L87 Difference]: Start difference. First operand 414 states and 620 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:24,723 INFO L93 Difference]: Finished difference Result 853 states and 1297 transitions. [2023-04-03 02:27:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:24,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 110 [2023-04-03 02:27:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:24,728 INFO L225 Difference]: With dead ends: 853 [2023-04-03 02:27:24,728 INFO L226 Difference]: Without dead ends: 608 [2023-04-03 02:27:24,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:24,735 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 132 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:24,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 736 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2023-04-03 02:27:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 606. [2023-04-03 02:27:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 602 states have (on average 1.5132890365448506) internal successors, (911), 602 states have internal predecessors, (911), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 914 transitions. [2023-04-03 02:27:24,784 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 914 transitions. Word has length 110 [2023-04-03 02:27:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:24,785 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 914 transitions. [2023-04-03 02:27:24,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 914 transitions. [2023-04-03 02:27:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-03 02:27:24,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:24,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:24,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:27:24,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:24,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:24,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1167282586, now seen corresponding path program 1 times [2023-04-03 02:27:24,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:24,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198225944] [2023-04-03 02:27:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:24,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:24,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:24,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198225944] [2023-04-03 02:27:24,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198225944] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:24,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:24,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:24,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56511506] [2023-04-03 02:27:24,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:24,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:24,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:24,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:24,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:24,964 INFO L87 Difference]: Start difference. First operand 606 states and 914 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:25,089 INFO L93 Difference]: Finished difference Result 1306 states and 1993 transitions. [2023-04-03 02:27:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:25,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 112 [2023-04-03 02:27:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:25,095 INFO L225 Difference]: With dead ends: 1306 [2023-04-03 02:27:25,095 INFO L226 Difference]: Without dead ends: 869 [2023-04-03 02:27:25,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:25,102 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 131 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:25,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 665 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2023-04-03 02:27:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 867. [2023-04-03 02:27:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 863 states have (on average 1.5214368482039398) internal successors, (1313), 863 states have internal predecessors, (1313), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1316 transitions. [2023-04-03 02:27:25,161 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1316 transitions. Word has length 112 [2023-04-03 02:27:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:25,161 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1316 transitions. [2023-04-03 02:27:25,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1316 transitions. [2023-04-03 02:27:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-03 02:27:25,163 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:25,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:25,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:27:25,163 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:25,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1525088698, now seen corresponding path program 1 times [2023-04-03 02:27:25,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:25,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846426891] [2023-04-03 02:27:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:25,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:25,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:25,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846426891] [2023-04-03 02:27:25,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846426891] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:25,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:25,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:25,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704813884] [2023-04-03 02:27:25,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:25,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:25,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:25,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:25,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:25,348 INFO L87 Difference]: Start difference. First operand 867 states and 1316 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:25,564 INFO L93 Difference]: Finished difference Result 2074 states and 3169 transitions. [2023-04-03 02:27:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:25,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 115 [2023-04-03 02:27:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:25,571 INFO L225 Difference]: With dead ends: 2074 [2023-04-03 02:27:25,571 INFO L226 Difference]: Without dead ends: 1394 [2023-04-03 02:27:25,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:25,573 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 126 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:25,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 709 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-04-03 02:27:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1392. [2023-04-03 02:27:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1388 states have (on average 1.5187319884726225) internal successors, (2108), 1388 states have internal predecessors, (2108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 2111 transitions. [2023-04-03 02:27:25,719 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 2111 transitions. Word has length 115 [2023-04-03 02:27:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:25,719 INFO L495 AbstractCegarLoop]: Abstraction has 1392 states and 2111 transitions. [2023-04-03 02:27:25,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 2111 transitions. [2023-04-03 02:27:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-03 02:27:25,721 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:25,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:25,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:27:25,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:25,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:25,722 INFO L85 PathProgramCache]: Analyzing trace with hash 319406150, now seen corresponding path program 1 times [2023-04-03 02:27:25,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:25,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002122498] [2023-04-03 02:27:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:25,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:25,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:25,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002122498] [2023-04-03 02:27:25,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002122498] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:25,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:25,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:25,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925075897] [2023-04-03 02:27:25,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:25,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:25,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:25,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:25,931 INFO L87 Difference]: Start difference. First operand 1392 states and 2111 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:26,248 INFO L93 Difference]: Finished difference Result 3295 states and 5029 transitions. [2023-04-03 02:27:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:26,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 117 [2023-04-03 02:27:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:26,258 INFO L225 Difference]: With dead ends: 3295 [2023-04-03 02:27:26,258 INFO L226 Difference]: Without dead ends: 2090 [2023-04-03 02:27:26,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:26,262 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 125 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:26,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 667 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:26,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2023-04-03 02:27:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2023-04-03 02:27:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2084 states have (on average 1.522552783109405) internal successors, (3173), 2084 states have internal predecessors, (3173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3176 transitions. [2023-04-03 02:27:26,493 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3176 transitions. Word has length 117 [2023-04-03 02:27:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:26,493 INFO L495 AbstractCegarLoop]: Abstraction has 2088 states and 3176 transitions. [2023-04-03 02:27:26,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3176 transitions. [2023-04-03 02:27:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-03 02:27:26,495 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:26,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:26,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:27:26,495 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:26,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1686705394, now seen corresponding path program 1 times [2023-04-03 02:27:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:26,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120594041] [2023-04-03 02:27:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:26,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:26,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:26,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120594041] [2023-04-03 02:27:26,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120594041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:26,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:26,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:26,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950172654] [2023-04-03 02:27:26,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:26,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:26,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:26,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:26,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:26,632 INFO L87 Difference]: Start difference. First operand 2088 states and 3176 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:27,093 INFO L93 Difference]: Finished difference Result 5395 states and 8209 transitions. [2023-04-03 02:27:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:27,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 120 [2023-04-03 02:27:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:27,108 INFO L225 Difference]: With dead ends: 5395 [2023-04-03 02:27:27,108 INFO L226 Difference]: Without dead ends: 3512 [2023-04-03 02:27:27,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:27,114 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 120 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:27,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 682 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3512 states. [2023-04-03 02:27:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3512 to 3510. [2023-04-03 02:27:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 3506 states have (on average 1.5108385624643468) internal successors, (5297), 3506 states have internal predecessors, (5297), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 5300 transitions. [2023-04-03 02:27:27,489 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 5300 transitions. Word has length 120 [2023-04-03 02:27:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:27,490 INFO L495 AbstractCegarLoop]: Abstraction has 3510 states and 5300 transitions. [2023-04-03 02:27:27,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 5300 transitions. [2023-04-03 02:27:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-03 02:27:27,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:27,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:27,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:27:27,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:27,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash 285175129, now seen corresponding path program 1 times [2023-04-03 02:27:27,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:27,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315035155] [2023-04-03 02:27:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:27,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:27,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:27,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315035155] [2023-04-03 02:27:27,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315035155] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:27,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:27,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:27,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317246406] [2023-04-03 02:27:27,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:27,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:27,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:27,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:27,667 INFO L87 Difference]: Start difference. First operand 3510 states and 5300 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:28,344 INFO L93 Difference]: Finished difference Result 8716 states and 13213 transitions. [2023-04-03 02:27:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:28,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 122 [2023-04-03 02:27:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:28,370 INFO L225 Difference]: With dead ends: 8716 [2023-04-03 02:27:28,370 INFO L226 Difference]: Without dead ends: 5411 [2023-04-03 02:27:28,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:28,381 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 119 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:28,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 669 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2023-04-03 02:27:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 5409. [2023-04-03 02:27:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5409 states, 5405 states have (on average 1.5128584643848288) internal successors, (8177), 5405 states have internal predecessors, (8177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 8180 transitions. [2023-04-03 02:27:28,955 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 8180 transitions. Word has length 122 [2023-04-03 02:27:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:28,956 INFO L495 AbstractCegarLoop]: Abstraction has 5409 states and 8180 transitions. [2023-04-03 02:27:28,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 8180 transitions. [2023-04-03 02:27:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 02:27:28,957 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:28,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:28,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:27:28,957 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:28,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:28,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1059820149, now seen corresponding path program 1 times [2023-04-03 02:27:28,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:28,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823012563] [2023-04-03 02:27:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:28,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:29,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:29,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823012563] [2023-04-03 02:27:29,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823012563] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:29,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:29,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:27:29,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849726710] [2023-04-03 02:27:29,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:29,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:27:29,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:29,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:27:29,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:27:29,167 INFO L87 Difference]: Start difference. First operand 5409 states and 8180 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:30,307 INFO L93 Difference]: Finished difference Result 13492 states and 20479 transitions. [2023-04-03 02:27:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:27:30,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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 125 [2023-04-03 02:27:30,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:30,342 INFO L225 Difference]: With dead ends: 13492 [2023-04-03 02:27:30,342 INFO L226 Difference]: Without dead ends: 8252 [2023-04-03 02:27:30,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:27:30,353 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 1005 mSDsluCounter, 2741 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 3102 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:30,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 3102 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:27:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8252 states. [2023-04-03 02:27:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8252 to 8195. [2023-04-03 02:27:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8195 states, 8191 states have (on average 1.519228421438164) internal successors, (12444), 8191 states have internal predecessors, (12444), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8195 states to 8195 states and 12447 transitions. [2023-04-03 02:27:31,305 INFO L78 Accepts]: Start accepts. Automaton has 8195 states and 12447 transitions. Word has length 125 [2023-04-03 02:27:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:31,305 INFO L495 AbstractCegarLoop]: Abstraction has 8195 states and 12447 transitions. [2023-04-03 02:27:31,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 8195 states and 12447 transitions. [2023-04-03 02:27:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-03 02:27:31,307 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:31,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:31,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:27:31,310 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:31,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1571482025, now seen corresponding path program 1 times [2023-04-03 02:27:31,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:31,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640146100] [2023-04-03 02:27:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:31,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:31,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:31,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640146100] [2023-04-03 02:27:31,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640146100] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:31,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:31,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:27:31,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612772464] [2023-04-03 02:27:31,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:31,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:27:31,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:31,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:27:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:27:31,496 INFO L87 Difference]: Start difference. First operand 8195 states and 12447 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:32,366 INFO L93 Difference]: Finished difference Result 16169 states and 24573 transitions. [2023-04-03 02:27:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:27:32,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 126 [2023-04-03 02:27:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:32,413 INFO L225 Difference]: With dead ends: 16169 [2023-04-03 02:27:32,414 INFO L226 Difference]: Without dead ends: 8197 [2023-04-03 02:27:32,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:27:32,438 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 245 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:32,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1004 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2023-04-03 02:27:33,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 8188. [2023-04-03 02:27:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8188 states, 8184 states have (on average 1.5155180840664713) internal successors, (12403), 8184 states have internal predecessors, (12403), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 12406 transitions. [2023-04-03 02:27:33,371 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 12406 transitions. Word has length 126 [2023-04-03 02:27:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:33,372 INFO L495 AbstractCegarLoop]: Abstraction has 8188 states and 12406 transitions. [2023-04-03 02:27:33,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 12406 transitions. [2023-04-03 02:27:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-03 02:27:33,374 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:33,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:27:33,374 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:33,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash 794943632, now seen corresponding path program 1 times [2023-04-03 02:27:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:33,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56520779] [2023-04-03 02:27:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:33,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:33,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56520779] [2023-04-03 02:27:33,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56520779] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:33,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:33,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:27:33,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239410232] [2023-04-03 02:27:33,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:33,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:27:33,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:33,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:27:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:27:33,850 INFO L87 Difference]: Start difference. First operand 8188 states and 12406 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:35,265 INFO L93 Difference]: Finished difference Result 13214 states and 19800 transitions. [2023-04-03 02:27:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:27:35,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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 135 [2023-04-03 02:27:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:35,308 INFO L225 Difference]: With dead ends: 13214 [2023-04-03 02:27:35,308 INFO L226 Difference]: Without dead ends: 13212 [2023-04-03 02:27:35,316 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 02:27:35,317 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 253 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:35,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1638 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13212 states. [2023-04-03 02:27:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13212 to 8312. [2023-04-03 02:27:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8312 states, 8308 states have (on average 1.4990370727010112) internal successors, (12454), 8308 states have internal predecessors, (12454), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8312 states to 8312 states and 12457 transitions. [2023-04-03 02:27:36,363 INFO L78 Accepts]: Start accepts. Automaton has 8312 states and 12457 transitions. Word has length 135 [2023-04-03 02:27:36,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:36,364 INFO L495 AbstractCegarLoop]: Abstraction has 8312 states and 12457 transitions. [2023-04-03 02:27:36,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8312 states and 12457 transitions. [2023-04-03 02:27:36,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-03 02:27:36,366 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:36,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:36,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:27:36,367 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:36,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:36,367 INFO L85 PathProgramCache]: Analyzing trace with hash 337815343, now seen corresponding path program 1 times [2023-04-03 02:27:36,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:36,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320497173] [2023-04-03 02:27:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:36,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:27:38,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:38,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320497173] [2023-04-03 02:27:38,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320497173] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:27:38,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055618969] [2023-04-03 02:27:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:38,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:27:38,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:27:38,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:27:38,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:27:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:39,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 02:27:39,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:27:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:27:39,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:27:39,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055618969] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:39,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:27:39,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2023-04-03 02:27:39,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5723560] [2023-04-03 02:27:39,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:39,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:27:39,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:39,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:27:39,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:27:39,513 INFO L87 Difference]: Start difference. First operand 8312 states and 12457 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:41,925 INFO L93 Difference]: Finished difference Result 24535 states and 36769 transitions. [2023-04-03 02:27:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:27:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2023-04-03 02:27:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:41,978 INFO L225 Difference]: With dead ends: 24535 [2023-04-03 02:27:41,978 INFO L226 Difference]: Without dead ends: 16246 [2023-04-03 02:27:41,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:27:42,000 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 854 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:42,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 772 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16246 states. [2023-04-03 02:27:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16246 to 16244. [2023-04-03 02:27:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16244 states, 16240 states have (on average 1.4932266009852218) internal successors, (24250), 16240 states have internal predecessors, (24250), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16244 states to 16244 states and 24253 transitions. [2023-04-03 02:27:43,586 INFO L78 Accepts]: Start accepts. Automaton has 16244 states and 24253 transitions. Word has length 143 [2023-04-03 02:27:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:43,586 INFO L495 AbstractCegarLoop]: Abstraction has 16244 states and 24253 transitions. [2023-04-03 02:27:43,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 16244 states and 24253 transitions. [2023-04-03 02:27:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-03 02:27:43,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:43,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:43,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 02:27:43,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-03 02:27:43,799 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:43,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:43,799 INFO L85 PathProgramCache]: Analyzing trace with hash 620245175, now seen corresponding path program 1 times [2023-04-03 02:27:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:43,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627098567] [2023-04-03 02:27:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:43,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 02:27:43,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:43,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627098567] [2023-04-03 02:27:43,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627098567] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:43,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:43,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:43,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437221110] [2023-04-03 02:27:43,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:43,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:43,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:43,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:43,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:43,945 INFO L87 Difference]: Start difference. First operand 16244 states and 24253 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:47,170 INFO L93 Difference]: Finished difference Result 47674 states and 71163 transitions. [2023-04-03 02:27:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:47,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 145 [2023-04-03 02:27:47,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:47,273 INFO L225 Difference]: With dead ends: 47674 [2023-04-03 02:27:47,274 INFO L226 Difference]: Without dead ends: 31549 [2023-04-03 02:27:47,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:47,314 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 241 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:47,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 977 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31549 states. [2023-04-03 02:27:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31549 to 31547. [2023-04-03 02:27:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31547 states, 31543 states have (on average 1.4859081254160986) internal successors, (46870), 31543 states have internal predecessors, (46870), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31547 states to 31547 states and 46873 transitions. [2023-04-03 02:27:51,083 INFO L78 Accepts]: Start accepts. Automaton has 31547 states and 46873 transitions. Word has length 145 [2023-04-03 02:27:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:51,084 INFO L495 AbstractCegarLoop]: Abstraction has 31547 states and 46873 transitions. [2023-04-03 02:27:51,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 31547 states and 46873 transitions. [2023-04-03 02:27:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-03 02:27:51,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:51,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:27:51,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:51,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash 719656559, now seen corresponding path program 1 times [2023-04-03 02:27:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:51,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565538897] [2023-04-03 02:27:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 02:27:51,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:51,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565538897] [2023-04-03 02:27:51,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565538897] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:51,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:51,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:51,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503071067] [2023-04-03 02:27:51,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:51,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:51,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:51,189 INFO L87 Difference]: Start difference. First operand 31547 states and 46873 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:58,441 INFO L93 Difference]: Finished difference Result 94523 states and 140437 transitions. [2023-04-03 02:27:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:58,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 145 [2023-04-03 02:27:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:58,623 INFO L225 Difference]: With dead ends: 94523 [2023-04-03 02:27:58,623 INFO L226 Difference]: Without dead ends: 63023 [2023-04-03 02:27:58,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:58,688 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 338 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:58,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 685 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63023 states. [2023-04-03 02:28:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63023 to 31559. [2023-04-03 02:28:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31559 states, 31555 states have (on average 1.4857867215972111) internal successors, (46884), 31555 states have internal predecessors, (46884), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31559 states to 31559 states and 46887 transitions. [2023-04-03 02:28:03,183 INFO L78 Accepts]: Start accepts. Automaton has 31559 states and 46887 transitions. Word has length 145 [2023-04-03 02:28:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:28:03,184 INFO L495 AbstractCegarLoop]: Abstraction has 31559 states and 46887 transitions. [2023-04-03 02:28:03,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 31559 states and 46887 transitions. [2023-04-03 02:28:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-03 02:28:03,188 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:03,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:03,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:28:03,188 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:28:03,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash -913479225, now seen corresponding path program 1 times [2023-04-03 02:28:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:03,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911794874] [2023-04-03 02:28:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:03,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:28:04,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:04,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911794874] [2023-04-03 02:28:04,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911794874] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:28:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254675251] [2023-04-03 02:28:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:04,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:28:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:28:04,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:28:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:28:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:05,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 1331 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 02:28:05,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:28:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 02:28:05,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:28:05,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254675251] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:05,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:28:05,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-03 02:28:05,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511610122] [2023-04-03 02:28:05,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:05,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:28:05,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:05,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:28:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:28:05,351 INFO L87 Difference]: Start difference. First operand 31559 states and 46887 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:28:09,771 INFO L93 Difference]: Finished difference Result 63430 states and 94214 transitions. [2023-04-03 02:28:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:28:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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 146 [2023-04-03 02:28:09,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:28:09,851 INFO L225 Difference]: With dead ends: 63430 [2023-04-03 02:28:09,852 INFO L226 Difference]: Without dead ends: 31882 [2023-04-03 02:28:09,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:28:09,897 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 958 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:28:09,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 691 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:28:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31882 states. [2023-04-03 02:28:14,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31882 to 31624. [2023-04-03 02:28:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31624 states, 31620 states have (on average 1.4858001265022138) internal successors, (46981), 31620 states have internal predecessors, (46981), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31624 states to 31624 states and 46984 transitions. [2023-04-03 02:28:14,329 INFO L78 Accepts]: Start accepts. Automaton has 31624 states and 46984 transitions. Word has length 146 [2023-04-03 02:28:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:28:14,330 INFO L495 AbstractCegarLoop]: Abstraction has 31624 states and 46984 transitions. [2023-04-03 02:28:14,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 31624 states and 46984 transitions. [2023-04-03 02:28:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-03 02:28:14,334 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:14,334 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:14,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 02:28:14,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-03 02:28:14,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:28:14,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:14,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1345779875, now seen corresponding path program 1 times [2023-04-03 02:28:14,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:14,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949194457] [2023-04-03 02:28:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:28:16,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:16,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949194457] [2023-04-03 02:28:16,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949194457] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:28:16,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598691723] [2023-04-03 02:28:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:16,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:28:16,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:28:16,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:28:16,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:28:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:16,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 1334 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 02:28:16,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:28:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:28:16,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:28:16,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598691723] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:16,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:28:16,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 16 [2023-04-03 02:28:16,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567861499] [2023-04-03 02:28:16,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:16,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:28:16,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:16,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:28:16,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:28:16,668 INFO L87 Difference]: Start difference. First operand 31624 states and 46984 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:28:25,352 INFO L93 Difference]: Finished difference Result 93378 states and 138702 transitions. [2023-04-03 02:28:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:28:25,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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 148 [2023-04-03 02:28:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:28:25,468 INFO L225 Difference]: With dead ends: 93378 [2023-04-03 02:28:25,469 INFO L226 Difference]: Without dead ends: 61952 [2023-04-03 02:28:25,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:28:25,519 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 782 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:28:25,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 717 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:28:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61952 states. [2023-04-03 02:28:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61952 to 61950. [2023-04-03 02:28:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61950 states, 61946 states have (on average 1.4808542924482615) internal successors, (91733), 61946 states have internal predecessors, (91733), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61950 states to 61950 states and 91736 transitions. [2023-04-03 02:28:34,101 INFO L78 Accepts]: Start accepts. Automaton has 61950 states and 91736 transitions. Word has length 148 [2023-04-03 02:28:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:28:34,102 INFO L495 AbstractCegarLoop]: Abstraction has 61950 states and 91736 transitions. [2023-04-03 02:28:34,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 61950 states and 91736 transitions. [2023-04-03 02:28:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-03 02:28:34,109 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:34,109 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:34,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 02:28:34,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:28:34,318 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:28:34,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:34,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1728875082, now seen corresponding path program 1 times [2023-04-03 02:28:34,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:34,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350983044] [2023-04-03 02:28:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:34,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:28:34,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:34,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350983044] [2023-04-03 02:28:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350983044] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:34,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:28:34,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:28:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890674375] [2023-04-03 02:28:34,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:34,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:28:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:28:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:28:34,435 INFO L87 Difference]: Start difference. First operand 61950 states and 91736 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:28:52,097 INFO L93 Difference]: Finished difference Result 182658 states and 270422 transitions. [2023-04-03 02:28:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:28:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 150 [2023-04-03 02:28:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:28:52,357 INFO L225 Difference]: With dead ends: 182658 [2023-04-03 02:28:52,357 INFO L226 Difference]: Without dead ends: 120898 [2023-04-03 02:28:52,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:28:52,432 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 227 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:28:52,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 962 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:28:52,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120898 states. [2023-04-03 02:29:09,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120898 to 120896. [2023-04-03 02:29:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120896 states, 120892 states have (on average 1.4742828309565563) internal successors, (178229), 120892 states have internal predecessors, (178229), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120896 states to 120896 states and 178232 transitions. [2023-04-03 02:29:10,189 INFO L78 Accepts]: Start accepts. Automaton has 120896 states and 178232 transitions. Word has length 150 [2023-04-03 02:29:10,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:29:10,189 INFO L495 AbstractCegarLoop]: Abstraction has 120896 states and 178232 transitions. [2023-04-03 02:29:10,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:29:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 120896 states and 178232 transitions. [2023-04-03 02:29:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-03 02:29:10,197 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:29:10,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:29:10,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:29:10,197 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:29:10,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:29:10,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1325874280, now seen corresponding path program 1 times [2023-04-03 02:29:10,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:29:10,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288727984] [2023-04-03 02:29:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:29:10,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:29:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:29:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 02:29:10,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:29:10,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288727984] [2023-04-03 02:29:10,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288727984] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:29:10,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:29:10,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:29:10,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322353115] [2023-04-03 02:29:10,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:29:10,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:29:10,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:29:10,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:29:10,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:29:10,285 INFO L87 Difference]: Start difference. First operand 120896 states and 178232 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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)