/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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:22:54,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:22:54,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:22:54,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:22:54,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:22:54,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:22:54,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:22:54,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:22:54,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:22:54,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:22:54,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:22:54,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:22:54,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:22:54,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:22:54,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:22:54,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:22:54,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:22:54,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:22:54,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:22:54,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:22:54,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:22:54,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:22:54,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:22:54,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:22:54,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:22:54,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:22:54,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:22:54,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:22:54,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:22:54,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2023-04-03 02:22:54,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:22:54,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:22:54,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:22:54,230 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 02:22:54,254 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:22:54,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:22:54,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:22:54,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:22:54,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:22:54,256 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:22:54,256 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:22:54,256 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:22:54,256 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:22:54,256 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:22:54,257 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:22:54,257 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:22:54,257 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:22:54,257 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:22:54,257 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:22:54,257 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:22:54,257 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:22:54,257 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:22:54,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:22:54,258 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:22:54,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:22:54,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:22:54,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:22:54,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:22:54,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:22:54,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:22:54,259 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:22:54,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:22:54,259 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:22:54,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:22:54,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:22:54,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:22:54,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:22:54,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:22:54,260 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:22:54,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:22:54,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:22:54,260 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:22:54,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:22:54,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:22:54,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:22:54,260 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:22:54,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:22:54,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:22:54,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:22:54,484 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:22:54,484 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:22:54,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-03 02:22:55,597 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:22:55,844 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:22:55,845 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-03 02:22:55,855 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51b10678d/615b3cb76ea141528c59d319e72acc14/FLAG1c3bbf3b0 [2023-04-03 02:22:55,868 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51b10678d/615b3cb76ea141528c59d319e72acc14 [2023-04-03 02:22:55,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:22:55,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:22:55,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:22:55,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:22:55,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:22:55,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:22:55" (1/1) ... [2023-04-03 02:22:55,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58bc3e07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:55, skipping insertion in model container [2023-04-03 02:22:55,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:22:55" (1/1) ... [2023-04-03 02:22:55,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:22:55,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:22:56,205 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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12498,12511] [2023-04-03 02:22:56,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:22:56,302 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:22:56,366 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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12498,12511] [2023-04-03 02:22:56,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:22:56,426 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:22:56,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56 WrapperNode [2023-04-03 02:22:56,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:22:56,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:22:56,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:22:56,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:22:56,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56" (1/1) ... [2023-04-03 02:22:56,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56" (1/1) ... [2023-04-03 02:22:56,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56" (1/1) ... [2023-04-03 02:22:56,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56" (1/1) ... [2023-04-03 02:22:56,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56" (1/1) ... [2023-04-03 02:22:56,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56" (1/1) ... [2023-04-03 02:22:56,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56" (1/1) ... [2023-04-03 02:22:56,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56" (1/1) ... [2023-04-03 02:22:56,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:22:56,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:22:56,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:22:56,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:22:56,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56" (1/1) ... [2023-04-03 02:22:56,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:22:56,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:22:56,544 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 02:22:56,560 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 02:22:56,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:22:56,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:22:56,590 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:22:56,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:22:56,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:22:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:22:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:22:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:22:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:22:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:22:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:22:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:22:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:22:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:22:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:22:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:22:56,793 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:22:56,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:22:57,506 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:22:57,732 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:22:57,732 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:22:57,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:22:57 BoogieIcfgContainer [2023-04-03 02:22:57,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:22:57,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:22:57,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:22:57,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:22:57,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:22:55" (1/3) ... [2023-04-03 02:22:57,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f6d9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:22:57, skipping insertion in model container [2023-04-03 02:22:57,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:22:56" (2/3) ... [2023-04-03 02:22:57,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f6d9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:22:57, skipping insertion in model container [2023-04-03 02:22:57,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:22:57" (3/3) ... [2023-04-03 02:22:57,741 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-03 02:22:57,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:22:57,760 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:22:57,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:22:57,815 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;@7210467e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:22:57,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:22:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 257 states, 244 states have (on average 1.6639344262295082) internal successors, (406), 252 states have internal predecessors, (406), 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 02:22:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-03 02:22:57,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:57,835 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] [2023-04-03 02:22:57,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:57,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1123423107, now seen corresponding path program 1 times [2023-04-03 02:22:57,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:57,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979424929] [2023-04-03 02:22:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:58,373 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 02:22:58,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:58,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979424929] [2023-04-03 02:22:58,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979424929] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:58,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:58,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:58,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791482024] [2023-04-03 02:22:58,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:58,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:58,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:58,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:58,415 INFO L87 Difference]: Start difference. First operand has 257 states, 244 states have (on average 1.6639344262295082) internal successors, (406), 252 states have internal predecessors, (406), 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 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 02:22:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:58,593 INFO L93 Difference]: Finished difference Result 442 states and 685 transitions. [2023-04-03 02:22:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 94 [2023-04-03 02:22:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:58,604 INFO L225 Difference]: With dead ends: 442 [2023-04-03 02:22:58,604 INFO L226 Difference]: Without dead ends: 319 [2023-04-03 02:22:58,607 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 02:22:58,610 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 153 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 831 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 02:22:58,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 831 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:22:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-04-03 02:22:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 317. [2023-04-03 02:22:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 313 states have (on average 1.5143769968051117) internal successors, (474), 313 states have internal predecessors, (474), 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 02:22:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 477 transitions. [2023-04-03 02:22:58,658 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 477 transitions. Word has length 94 [2023-04-03 02:22:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:58,659 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 477 transitions. [2023-04-03 02:22:58,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 02:22:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 477 transitions. [2023-04-03 02:22:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 02:22:58,662 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:58,662 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] [2023-04-03 02:22:58,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:22:58,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:58,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:58,663 INFO L85 PathProgramCache]: Analyzing trace with hash -561696716, now seen corresponding path program 1 times [2023-04-03 02:22:58,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:58,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100455327] [2023-04-03 02:22:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:58,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:58,897 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 02:22:58,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:58,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100455327] [2023-04-03 02:22:58,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100455327] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:58,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:58,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:58,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580536244] [2023-04-03 02:22:58,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:58,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:58,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:58,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:58,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:58,901 INFO L87 Difference]: Start difference. First operand 317 states and 477 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 02:22:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:59,027 INFO L93 Difference]: Finished difference Result 569 states and 866 transitions. [2023-04-03 02:22:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 96 [2023-04-03 02:22:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:59,036 INFO L225 Difference]: With dead ends: 569 [2023-04-03 02:22:59,040 INFO L226 Difference]: Without dead ends: 408 [2023-04-03 02:22:59,046 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 02:22:59,047 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 133 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 638 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 02:22:59,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 638 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:22:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-04-03 02:22:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2023-04-03 02:22:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.5149253731343284) internal successors, (609), 402 states have internal predecessors, (609), 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 02:22:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 612 transitions. [2023-04-03 02:22:59,081 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 612 transitions. Word has length 96 [2023-04-03 02:22:59,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:59,082 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 612 transitions. [2023-04-03 02:22:59,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 02:22:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 612 transitions. [2023-04-03 02:22:59,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-03 02:22:59,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:59,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:59,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:22:59,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:59,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:59,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1420850169, now seen corresponding path program 1 times [2023-04-03 02:22:59,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:59,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373851949] [2023-04-03 02:22:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:59,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:59,274 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 02:22:59,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:59,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373851949] [2023-04-03 02:22:59,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373851949] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:59,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:59,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:59,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227562285] [2023-04-03 02:22:59,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:59,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:59,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:59,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:59,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:59,277 INFO L87 Difference]: Start difference. First operand 406 states and 612 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 02:22:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:59,370 INFO L93 Difference]: Finished difference Result 851 states and 1295 transitions. [2023-04-03 02:22:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:59,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 99 [2023-04-03 02:22:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:59,375 INFO L225 Difference]: With dead ends: 851 [2023-04-03 02:22:59,375 INFO L226 Difference]: Without dead ends: 603 [2023-04-03 02:22:59,378 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 02:22:59,380 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 132 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 714 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 02:22:59,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 714 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:22:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-04-03 02:22:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2023-04-03 02:22:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.5175879396984924) internal successors, (906), 597 states have internal predecessors, (906), 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 02:22:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 909 transitions. [2023-04-03 02:22:59,421 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 909 transitions. Word has length 99 [2023-04-03 02:22:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:59,422 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 909 transitions. [2023-04-03 02:22:59,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 02:22:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 909 transitions. [2023-04-03 02:22:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-03 02:22:59,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:59,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:22:59,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:22:59,427 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:59,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:59,428 INFO L85 PathProgramCache]: Analyzing trace with hash 882510563, now seen corresponding path program 1 times [2023-04-03 02:22:59,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:59,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306059934] [2023-04-03 02:22:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:59,563 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 02:22:59,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:59,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306059934] [2023-04-03 02:22:59,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306059934] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:59,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:59,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:59,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202783354] [2023-04-03 02:22:59,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:59,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:59,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:59,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:59,566 INFO L87 Difference]: Start difference. First operand 601 states and 909 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:59,662 INFO L93 Difference]: Finished difference Result 1310 states and 1997 transitions. [2023-04-03 02:22:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:59,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2023-04-03 02:22:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:59,667 INFO L225 Difference]: With dead ends: 1310 [2023-04-03 02:22:59,667 INFO L226 Difference]: Without dead ends: 867 [2023-04-03 02:22:59,668 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 02:22:59,673 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 131 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 655 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 02:22:59,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 655 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:22:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2023-04-03 02:22:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 865. [2023-04-03 02:22:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 861 states have (on average 1.5226480836236933) internal successors, (1311), 861 states have internal predecessors, (1311), 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 02:22:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1314 transitions. [2023-04-03 02:22:59,721 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1314 transitions. Word has length 101 [2023-04-03 02:22:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:59,721 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1314 transitions. [2023-04-03 02:22:59,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:22:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1314 transitions. [2023-04-03 02:22:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-03 02:22:59,722 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:59,722 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] [2023-04-03 02:22:59,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:22:59,722 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:59,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:59,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1154384406, now seen corresponding path program 1 times [2023-04-03 02:22:59,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:59,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742173423] [2023-04-03 02:22:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:59,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:59,824 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 02:22:59,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:59,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742173423] [2023-04-03 02:22:59,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742173423] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:59,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:59,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:22:59,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920341515] [2023-04-03 02:22:59,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:59,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:22:59,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:22:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:59,829 INFO L87 Difference]: Start difference. First operand 865 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 02:22:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:59,982 INFO L93 Difference]: Finished difference Result 2090 states and 3185 transitions. [2023-04-03 02:22:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:22:59,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 104 [2023-04-03 02:22:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:59,988 INFO L225 Difference]: With dead ends: 2090 [2023-04-03 02:22:59,988 INFO L226 Difference]: Without dead ends: 1401 [2023-04-03 02:22:59,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:22:59,990 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 126 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 687 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 02:22:59,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 687 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:22:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2023-04-03 02:23:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1399. [2023-04-03 02:23:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1395 states have (on average 1.5161290322580645) internal successors, (2115), 1395 states have internal predecessors, (2115), 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 02:23:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2118 transitions. [2023-04-03 02:23:00,072 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2118 transitions. Word has length 104 [2023-04-03 02:23:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:00,073 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 2118 transitions. [2023-04-03 02:23:00,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 02:23:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2118 transitions. [2023-04-03 02:23:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-03 02:23:00,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:00,074 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] [2023-04-03 02:23:00,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:23:00,074 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:00,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash 530538223, now seen corresponding path program 1 times [2023-04-03 02:23:00,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:00,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593476108] [2023-04-03 02:23:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:00,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:00,194 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 02:23:00,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:00,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593476108] [2023-04-03 02:23:00,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593476108] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:00,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:23:00,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:23:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063262545] [2023-04-03 02:23:00,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:00,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:23:00,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:23:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:23:00,196 INFO L87 Difference]: Start difference. First operand 1399 states and 2118 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 02:23:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:00,431 INFO L93 Difference]: Finished difference Result 3329 states and 5063 transitions. [2023-04-03 02:23:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:23:00,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 106 [2023-04-03 02:23:00,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:00,439 INFO L225 Difference]: With dead ends: 3329 [2023-04-03 02:23:00,439 INFO L226 Difference]: Without dead ends: 2106 [2023-04-03 02:23:00,442 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 02:23:00,442 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 125 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 657 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 02:23:00,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 657 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:23:00,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2023-04-03 02:23:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2104. [2023-04-03 02:23:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2100 states have (on average 1.5185714285714285) internal successors, (3189), 2100 states have internal predecessors, (3189), 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 02:23:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3192 transitions. [2023-04-03 02:23:00,579 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3192 transitions. Word has length 106 [2023-04-03 02:23:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:00,579 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3192 transitions. [2023-04-03 02:23:00,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 02:23:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3192 transitions. [2023-04-03 02:23:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-03 02:23:00,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:00,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:23:00,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:23:00,580 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:00,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1417186230, now seen corresponding path program 1 times [2023-04-03 02:23:00,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:00,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009005102] [2023-04-03 02:23:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:00,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:00,695 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 02:23:00,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:00,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009005102] [2023-04-03 02:23:00,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009005102] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:00,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:23:00,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:23:00,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631011469] [2023-04-03 02:23:00,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:00,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:23:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:00,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:23:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:23:00,697 INFO L87 Difference]: Start difference. First operand 2104 states and 3192 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:01,019 INFO L93 Difference]: Finished difference Result 5465 states and 8279 transitions. [2023-04-03 02:23:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:23:01,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2023-04-03 02:23:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:01,031 INFO L225 Difference]: With dead ends: 5465 [2023-04-03 02:23:01,032 INFO L226 Difference]: Without dead ends: 3555 [2023-04-03 02:23:01,052 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 02:23:01,053 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 120 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 660 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 02:23:01,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 660 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:23:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2023-04-03 02:23:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 3553. [2023-04-03 02:23:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 3549 states have (on average 1.5046491969568894) internal successors, (5340), 3549 states have internal predecessors, (5340), 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 02:23:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 5343 transitions. [2023-04-03 02:23:01,333 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 5343 transitions. Word has length 109 [2023-04-03 02:23:01,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:01,334 INFO L495 AbstractCegarLoop]: Abstraction has 3553 states and 5343 transitions. [2023-04-03 02:23:01,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 5343 transitions. [2023-04-03 02:23:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 02:23:01,334 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:01,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:01,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:23:01,335 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:01,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:01,336 INFO L85 PathProgramCache]: Analyzing trace with hash -660886994, now seen corresponding path program 1 times [2023-04-03 02:23:01,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:01,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87563432] [2023-04-03 02:23:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:01,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:01,427 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 02:23:01,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:01,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87563432] [2023-04-03 02:23:01,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87563432] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:01,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:23:01,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:23:01,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121515480] [2023-04-03 02:23:01,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:01,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:23:01,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:01,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:23:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:23:01,429 INFO L87 Difference]: Start difference. First operand 3553 states and 5343 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:01,843 INFO L93 Difference]: Finished difference Result 8840 states and 13337 transitions. [2023-04-03 02:23:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:23:01,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2023-04-03 02:23:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:01,863 INFO L225 Difference]: With dead ends: 8840 [2023-04-03 02:23:01,864 INFO L226 Difference]: Without dead ends: 5481 [2023-04-03 02:23:01,872 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 02:23:01,874 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 119 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:23:01,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 659 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:23:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2023-04-03 02:23:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5479. [2023-04-03 02:23:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5479 states, 5475 states have (on average 1.5063013698630137) internal successors, (8247), 5475 states have internal predecessors, (8247), 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 02:23:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 8250 transitions. [2023-04-03 02:23:02,302 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 8250 transitions. Word has length 111 [2023-04-03 02:23:02,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:02,302 INFO L495 AbstractCegarLoop]: Abstraction has 5479 states and 8250 transitions. [2023-04-03 02:23:02,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:23:02,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 8250 transitions. [2023-04-03 02:23:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-03 02:23:02,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:02,303 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] [2023-04-03 02:23:02,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:23:02,303 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:02,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:02,304 INFO L85 PathProgramCache]: Analyzing trace with hash -524461459, now seen corresponding path program 1 times [2023-04-03 02:23:02,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:02,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135034544] [2023-04-03 02:23:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:02,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:02,468 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 02:23:02,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:02,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135034544] [2023-04-03 02:23:02,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135034544] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:02,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:23:02,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:23:02,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069980064] [2023-04-03 02:23:02,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:02,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:23:02,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:23:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:23:02,470 INFO L87 Difference]: Start difference. First operand 5479 states and 8250 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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 02:23:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:03,352 INFO L93 Difference]: Finished difference Result 13723 states and 20710 transitions. [2023-04-03 02:23:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:23:03,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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 114 [2023-04-03 02:23:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:03,385 INFO L225 Difference]: With dead ends: 13723 [2023-04-03 02:23:03,385 INFO L226 Difference]: Without dead ends: 8402 [2023-04-03 02:23:03,396 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 02:23:03,397 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 1011 mSDsluCounter, 2709 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 3059 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:23:03,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 3059 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:23:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2023-04-03 02:23:04,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 8345. [2023-04-03 02:23:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8345 states, 8341 states have (on average 1.509890900371658) internal successors, (12594), 8341 states have internal predecessors, (12594), 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 02:23:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8345 states to 8345 states and 12597 transitions. [2023-04-03 02:23:04,086 INFO L78 Accepts]: Start accepts. Automaton has 8345 states and 12597 transitions. Word has length 114 [2023-04-03 02:23:04,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:04,086 INFO L495 AbstractCegarLoop]: Abstraction has 8345 states and 12597 transitions. [2023-04-03 02:23:04,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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 02:23:04,087 INFO L276 IsEmpty]: Start isEmpty. Operand 8345 states and 12597 transitions. [2023-04-03 02:23:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-03 02:23:04,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:04,088 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 02:23:04,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:23:04,089 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:04,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:04,089 INFO L85 PathProgramCache]: Analyzing trace with hash 855395626, now seen corresponding path program 1 times [2023-04-03 02:23:04,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:04,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147554653] [2023-04-03 02:23:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:04,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:04,233 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 02:23:04,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:04,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147554653] [2023-04-03 02:23:04,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147554653] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:04,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:23:04,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:23:04,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860449070] [2023-04-03 02:23:04,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:04,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:23:04,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:04,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:23:04,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:23:04,235 INFO L87 Difference]: Start difference. First operand 8345 states and 12597 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 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 02:23:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:04,854 INFO L93 Difference]: Finished difference Result 16480 states and 24884 transitions. [2023-04-03 02:23:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:23:04,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 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 02:23:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:04,892 INFO L225 Difference]: With dead ends: 16480 [2023-04-03 02:23:04,892 INFO L226 Difference]: Without dead ends: 8347 [2023-04-03 02:23:04,941 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 02:23:04,942 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 246 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 971 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 02:23:04,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 971 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:23:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8347 states. [2023-04-03 02:23:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8347 to 8338. [2023-04-03 02:23:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8334 states have (on average 1.5062395008399327) internal successors, (12553), 8334 states have internal predecessors, (12553), 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 02:23:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 12556 transitions. [2023-04-03 02:23:05,536 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 12556 transitions. Word has length 115 [2023-04-03 02:23:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:05,537 INFO L495 AbstractCegarLoop]: Abstraction has 8338 states and 12556 transitions. [2023-04-03 02:23:05,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 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 02:23:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 12556 transitions. [2023-04-03 02:23:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-03 02:23:05,538 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:05,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:23:05,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:23:05,538 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:05,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1139310232, now seen corresponding path program 1 times [2023-04-03 02:23:05,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:05,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615218618] [2023-04-03 02:23:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:05,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:23:05,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:05,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615218618] [2023-04-03 02:23:05,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615218618] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:05,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:23:05,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:23:05,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882154164] [2023-04-03 02:23:05,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:05,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:23:05,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:05,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:23:05,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:23:05,887 INFO L87 Difference]: Start difference. First operand 8338 states and 12556 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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 02:23:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:07,269 INFO L93 Difference]: Finished difference Result 13426 states and 20012 transitions. [2023-04-03 02:23:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:23:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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 124 [2023-04-03 02:23:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:07,300 INFO L225 Difference]: With dead ends: 13426 [2023-04-03 02:23:07,301 INFO L226 Difference]: Without dead ends: 13424 [2023-04-03 02:23:07,306 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 02:23:07,307 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 255 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:23:07,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1594 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:23:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13424 states. [2023-04-03 02:23:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13424 to 8462. [2023-04-03 02:23:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8462 states, 8458 states have (on average 1.4901868053913454) internal successors, (12604), 8458 states have internal predecessors, (12604), 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 02:23:08,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8462 states to 8462 states and 12607 transitions. [2023-04-03 02:23:08,200 INFO L78 Accepts]: Start accepts. Automaton has 8462 states and 12607 transitions. Word has length 124 [2023-04-03 02:23:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:08,201 INFO L495 AbstractCegarLoop]: Abstraction has 8462 states and 12607 transitions. [2023-04-03 02:23:08,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 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 02:23:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 8462 states and 12607 transitions. [2023-04-03 02:23:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-03 02:23:08,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:08,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:23:08,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:23:08,202 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:08,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash 835681995, now seen corresponding path program 1 times [2023-04-03 02:23:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:08,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137045251] [2023-04-03 02:23:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:08,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:23:11,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137045251] [2023-04-03 02:23:11,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137045251] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:23:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194921608] [2023-04-03 02:23:11,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:11,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:23:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:23:11,235 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 02:23:11,238 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 02:23:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:11,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 02:23:11,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:23:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:23:11,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:23:11,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194921608] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:11,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:23:11,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-03 02:23:11,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63561929] [2023-04-03 02:23:11,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:11,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:23:11,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:23:11,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:23:11,715 INFO L87 Difference]: Start difference. First operand 8462 states and 12607 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 02:23:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:13,371 INFO L93 Difference]: Finished difference Result 24985 states and 37219 transitions. [2023-04-03 02:23:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:23:13,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 133 [2023-04-03 02:23:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:13,416 INFO L225 Difference]: With dead ends: 24985 [2023-04-03 02:23:13,416 INFO L226 Difference]: Without dead ends: 16546 [2023-04-03 02:23:13,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:23:13,436 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 832 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 750 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 02:23:13,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 750 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:23:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16546 states. [2023-04-03 02:23:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16546 to 16544. [2023-04-03 02:23:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16544 states, 16540 states have (on average 1.4842805320435308) internal successors, (24550), 16540 states have internal predecessors, (24550), 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 02:23:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16544 states to 16544 states and 24553 transitions. [2023-04-03 02:23:14,831 INFO L78 Accepts]: Start accepts. Automaton has 16544 states and 24553 transitions. Word has length 133 [2023-04-03 02:23:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:14,831 INFO L495 AbstractCegarLoop]: Abstraction has 16544 states and 24553 transitions. [2023-04-03 02:23:14,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 02:23:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 16544 states and 24553 transitions. [2023-04-03 02:23:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-03 02:23:14,833 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:14,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:23:14,844 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 02:23:15,041 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 02:23:15,041 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:15,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:15,042 INFO L85 PathProgramCache]: Analyzing trace with hash 588692123, now seen corresponding path program 1 times [2023-04-03 02:23:15,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:15,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276590038] [2023-04-03 02:23:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:15,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 02:23:15,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:15,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276590038] [2023-04-03 02:23:15,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276590038] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:15,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:23:15,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:23:15,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748298031] [2023-04-03 02:23:15,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:15,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:23:15,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:15,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:23:15,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:23:15,140 INFO L87 Difference]: Start difference. First operand 16544 states and 24553 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 02:23:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:17,841 INFO L93 Difference]: Finished difference Result 48574 states and 72063 transitions. [2023-04-03 02:23:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:23:17,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 02:23:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:17,924 INFO L225 Difference]: With dead ends: 48574 [2023-04-03 02:23:17,924 INFO L226 Difference]: Without dead ends: 32149 [2023-04-03 02:23:17,954 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 02:23:17,955 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 241 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 944 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 02:23:17,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 944 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:23:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32149 states. [2023-04-03 02:23:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32149 to 32147. [2023-04-03 02:23:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32147 states, 32143 states have (on average 1.4768378807205302) internal successors, (47470), 32143 states have internal predecessors, (47470), 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 02:23:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32147 states to 32147 states and 47473 transitions. [2023-04-03 02:23:21,045 INFO L78 Accepts]: Start accepts. Automaton has 32147 states and 47473 transitions. Word has length 135 [2023-04-03 02:23:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:21,045 INFO L495 AbstractCegarLoop]: Abstraction has 32147 states and 47473 transitions. [2023-04-03 02:23:21,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 02:23:21,046 INFO L276 IsEmpty]: Start isEmpty. Operand 32147 states and 47473 transitions. [2023-04-03 02:23:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-03 02:23:21,049 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:21,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:23:21,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:23:21,049 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:21,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:21,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1490612230, now seen corresponding path program 1 times [2023-04-03 02:23:21,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:21,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068244006] [2023-04-03 02:23:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:21,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-03 02:23:21,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:21,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068244006] [2023-04-03 02:23:21,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068244006] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:21,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:23:21,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:23:21,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072845323] [2023-04-03 02:23:21,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:21,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:23:21,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:21,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:23:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:23:21,132 INFO L87 Difference]: Start difference. First operand 32147 states and 47473 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 02:23:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:27,259 INFO L93 Difference]: Finished difference Result 96323 states and 142237 transitions. [2023-04-03 02:23:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:23:27,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 02:23:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:27,430 INFO L225 Difference]: With dead ends: 96323 [2023-04-03 02:23:27,430 INFO L226 Difference]: Without dead ends: 64223 [2023-04-03 02:23:27,495 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 02:23:27,496 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 327 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 663 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 02:23:27,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 663 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:23:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64223 states. [2023-04-03 02:23:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64223 to 32159. [2023-04-03 02:23:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32159 states, 32155 states have (on average 1.4767221271963924) internal successors, (47484), 32155 states have internal predecessors, (47484), 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 02:23:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32159 states to 32159 states and 47487 transitions. [2023-04-03 02:23:31,976 INFO L78 Accepts]: Start accepts. Automaton has 32159 states and 47487 transitions. Word has length 135 [2023-04-03 02:23:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:31,976 INFO L495 AbstractCegarLoop]: Abstraction has 32159 states and 47487 transitions. [2023-04-03 02:23:31,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 02:23:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32159 states and 47487 transitions. [2023-04-03 02:23:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:23:31,980 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:31,980 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:23:31,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:23:31,980 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:31,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:31,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1326970642, now seen corresponding path program 1 times [2023-04-03 02:23:31,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:31,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088274886] [2023-04-03 02:23:31,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:31,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:23:34,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:34,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088274886] [2023-04-03 02:23:34,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088274886] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:23:34,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508447774] [2023-04-03 02:23:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:34,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:23:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:23:34,756 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 02:23:34,758 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 02:23:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:35,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 02:23:35,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:23:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 02:23:35,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:23:35,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508447774] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:35,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:23:35,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2023-04-03 02:23:35,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622936160] [2023-04-03 02:23:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:23:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:23:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:23:35,162 INFO L87 Difference]: Start difference. First operand 32159 states and 47487 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 02:23:39,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:39,343 INFO L93 Difference]: Finished difference Result 64608 states and 95392 transitions. [2023-04-03 02:23:39,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:23:39,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 136 [2023-04-03 02:23:39,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:39,403 INFO L225 Difference]: With dead ends: 64608 [2023-04-03 02:23:39,404 INFO L226 Difference]: Without dead ends: 32460 [2023-04-03 02:23:39,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:23:39,436 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 936 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 669 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 02:23:39,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 669 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:23:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32460 states. [2023-04-03 02:23:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32460 to 32224. [2023-04-03 02:23:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32224 states, 32220 states have (on average 1.4767535692116698) internal successors, (47581), 32220 states have internal predecessors, (47581), 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 02:23:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32224 states to 32224 states and 47584 transitions. [2023-04-03 02:23:43,254 INFO L78 Accepts]: Start accepts. Automaton has 32224 states and 47584 transitions. Word has length 136 [2023-04-03 02:23:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:23:43,254 INFO L495 AbstractCegarLoop]: Abstraction has 32224 states and 47584 transitions. [2023-04-03 02:23:43,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 02:23:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 32224 states and 47584 transitions. [2023-04-03 02:23:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-03 02:23:43,257 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:23:43,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:43,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-03 02:23:43,464 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 02:23:43,464 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:23:43,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:23:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1205404900, now seen corresponding path program 1 times [2023-04-03 02:23:43,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:23:43,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164743416] [2023-04-03 02:23:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:43,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:23:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:23:45,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:23:45,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164743416] [2023-04-03 02:23:45,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164743416] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:23:45,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517265919] [2023-04-03 02:23:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:23:45,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:23:45,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:23:45,531 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 02:23:45,533 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 02:23:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:23:45,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 02:23:45,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:23:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:23:45,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:23:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517265919] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:23:45,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:23:45,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-03 02:23:45,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964074050] [2023-04-03 02:23:45,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:23:45,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:23:45,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:23:45,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:23:45,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:23:45,915 INFO L87 Difference]: Start difference. First operand 32224 states and 47584 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 02:23:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:23:53,845 INFO L93 Difference]: Finished difference Result 95178 states and 140502 transitions. [2023-04-03 02:23:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:23:53,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 138 [2023-04-03 02:23:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:23:53,972 INFO L225 Difference]: With dead ends: 95178 [2023-04-03 02:23:53,972 INFO L226 Difference]: Without dead ends: 63152 [2023-04-03 02:23:54,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:23:54,009 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 760 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 695 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 02:23:54,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 695 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:23:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63152 states. [2023-04-03 02:24:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63152 to 63150. [2023-04-03 02:24:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63150 states, 63146 states have (on average 1.4717163399106832) internal successors, (92933), 63146 states have internal predecessors, (92933), 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 02:24:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63150 states to 63150 states and 92936 transitions. [2023-04-03 02:24:02,180 INFO L78 Accepts]: Start accepts. Automaton has 63150 states and 92936 transitions. Word has length 138 [2023-04-03 02:24:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:24:02,181 INFO L495 AbstractCegarLoop]: Abstraction has 63150 states and 92936 transitions. [2023-04-03 02:24:02,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 02:24:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 63150 states and 92936 transitions. [2023-04-03 02:24:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-03 02:24:02,185 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:24:02,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:02,200 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 02:24:02,391 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 02:24:02,391 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:24:02,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:24:02,392 INFO L85 PathProgramCache]: Analyzing trace with hash -863589317, now seen corresponding path program 1 times [2023-04-03 02:24:02,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:24:02,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885516203] [2023-04-03 02:24:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:24:02,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:24:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:24:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:24:02,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:24:02,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885516203] [2023-04-03 02:24:02,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885516203] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:24:02,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:24:02,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:24:02,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038671779] [2023-04-03 02:24:02,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:24:02,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:24:02,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:24:02,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:24:02,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:24:02,468 INFO L87 Difference]: Start difference. First operand 63150 states and 92936 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 02:24:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:24:18,799 INFO L93 Difference]: Finished difference Result 186258 states and 274022 transitions. [2023-04-03 02:24:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:24:18,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 140 [2023-04-03 02:24:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:24:19,111 INFO L225 Difference]: With dead ends: 186258 [2023-04-03 02:24:19,112 INFO L226 Difference]: Without dead ends: 123298 [2023-04-03 02:24:19,185 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 02:24:19,186 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 227 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 929 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 02:24:19,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 929 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:24:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123298 states. [2023-04-03 02:24:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123298 to 123296. [2023-04-03 02:24:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123296 states, 123292 states have (on average 1.4650504493397787) internal successors, (180629), 123292 states have internal predecessors, (180629), 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 02:24:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123296 states to 123296 states and 180632 transitions. [2023-04-03 02:24:37,685 INFO L78 Accepts]: Start accepts. Automaton has 123296 states and 180632 transitions. Word has length 140 [2023-04-03 02:24:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:24:37,686 INFO L495 AbstractCegarLoop]: Abstraction has 123296 states and 180632 transitions. [2023-04-03 02:24:37,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 02:24:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 123296 states and 180632 transitions. [2023-04-03 02:24:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-03 02:24:37,695 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:24:37,696 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:37,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:24:37,696 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:24:37,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:24:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1389090352, now seen corresponding path program 1 times [2023-04-03 02:24:37,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:24:37,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331035681] [2023-04-03 02:24:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:24:37,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:24:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:24:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-03 02:24:37,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:24:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331035681] [2023-04-03 02:24:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331035681] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:24:37,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:24:37,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:24:37,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622817534] [2023-04-03 02:24:37,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:24:37,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:24:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:24:37,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:24:37,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:24:37,765 INFO L87 Difference]: Start difference. First operand 123296 states and 180632 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 02:25:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:25:14,605 INFO L93 Difference]: Finished difference Result 369256 states and 540950 transitions. [2023-04-03 02:25:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:25:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 140 [2023-04-03 02:25:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:25:15,476 INFO L225 Difference]: With dead ends: 369256 [2023-04-03 02:25:15,476 INFO L226 Difference]: Without dead ends: 246298 [2023-04-03 02:25:15,634 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 02:25:15,634 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 280 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:25:15,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 926 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:25:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246298 states. [2023-04-03 02:25:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246298 to 123316. [2023-04-03 02:25:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123316 states, 123312 states have (on average 1.4649750227066303) internal successors, (180649), 123312 states have internal predecessors, (180649), 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 02:25:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123316 states to 123316 states and 180652 transitions. [2023-04-03 02:25:35,780 INFO L78 Accepts]: Start accepts. Automaton has 123316 states and 180652 transitions. Word has length 140 [2023-04-03 02:25:35,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:25:35,780 INFO L495 AbstractCegarLoop]: Abstraction has 123316 states and 180652 transitions. [2023-04-03 02:25:35,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 02:25:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 123316 states and 180652 transitions. [2023-04-03 02:25:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-03 02:25:35,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:25:35,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:35,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:25:35,788 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:25:35,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:25:35,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1359832149, now seen corresponding path program 1 times [2023-04-03 02:25:35,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:25:35,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867478622] [2023-04-03 02:25:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:25:35,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:25:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:25:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:25:37,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:25:37,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867478622] [2023-04-03 02:25:37,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867478622] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:25:37,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491966288] [2023-04-03 02:25:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:25:37,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:25:37,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:25:37,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:25:37,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 02:25:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:25:37,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 02:25:37,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:25:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:25:37,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:25:37,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491966288] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:25:37,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:25:37,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-03 02:25:37,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996784159] [2023-04-03 02:25:37,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:25:37,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:25:37,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:25:37,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:25:37,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:25:37,654 INFO L87 Difference]: Start difference. First operand 123316 states and 180652 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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)