/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.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:25:59,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:25:59,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:25:59,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:25:59,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:25:59,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:25:59,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:25:59,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:25:59,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:25:59,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:25:59,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:25:59,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:25:59,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:25:59,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:25:59,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:25:59,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:25:59,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:25:59,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:25:59,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:25:59,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:25:59,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:25:59,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:25:59,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:25:59,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:25:59,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:25:59,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:25:59,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:25:59,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:25:59,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:25:59,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:25:59,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:25:59,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:25:59,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:25:59,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:25:59,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:25:59,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:25:59,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:25:59,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:25:59,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:25:59,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:25:59,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:25:59,776 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 02:25:59,798 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:25:59,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:25:59,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:25:59,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:25:59,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:25:59,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:25:59,800 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:25:59,800 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:25:59,800 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:25:59,800 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:25:59,801 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:25:59,801 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:25:59,801 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:25:59,801 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:25:59,801 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:25:59,801 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:25:59,801 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:25:59,801 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:25:59,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:25:59,802 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:25:59,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:25:59,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:25:59,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:25:59,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:25:59,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:25:59,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:25:59,802 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:25:59,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:25:59,803 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:25:59,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:25:59,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:25:59,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:25:59,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:25:59,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:25:59,803 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:25:59,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:25:59,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:25:59,804 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:25:59,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:25:59,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:25:59,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:25:59,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:26:00,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:26:00,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:26:00,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:26:00,025 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:26:00,025 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:26:00,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-03 02:26:01,101 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:26:01,288 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:26:01,289 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-03 02:26:01,316 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb10baacc/b062f213816247cd91c5af9eb2a585d4/FLAG418740f0e [2023-04-03 02:26:01,327 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb10baacc/b062f213816247cd91c5af9eb2a585d4 [2023-04-03 02:26:01,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:26:01,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:26:01,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:26:01,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:26:01,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:26:01,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d899341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01, skipping insertion in model container [2023-04-03 02:26:01,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:26:01,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:26:01,556 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.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12834,12847] [2023-04-03 02:26:01,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:26:01,657 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:26:01,762 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.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12834,12847] [2023-04-03 02:26:01,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:26:01,798 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:26:01,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01 WrapperNode [2023-04-03 02:26:01,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:26:01,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:26:01,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:26:01,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:26:01,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,876 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:26:01,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:26:01,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:26:01,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:26:01,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01" (1/1) ... [2023-04-03 02:26:01,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:26:01,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:26:01,909 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 02:26:01,932 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 02:26:01,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:26:01,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:26:01,947 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:26:01,947 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:26:01,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:26:01,947 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:26:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:26:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:26:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:26:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:26:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:26:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:26:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:26:01,948 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:26:01,971 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:26:01,971 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:26:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:26:02,113 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:26:02,114 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:26:02,820 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:26:03,009 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:26:03,010 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:26:03,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:26:03 BoogieIcfgContainer [2023-04-03 02:26:03,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:26:03,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:26:03,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:26:03,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:26:03,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:26:01" (1/3) ... [2023-04-03 02:26:03,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e38a151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:26:03, skipping insertion in model container [2023-04-03 02:26:03,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:26:01" (2/3) ... [2023-04-03 02:26:03,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e38a151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:26:03, skipping insertion in model container [2023-04-03 02:26:03,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:26:03" (3/3) ... [2023-04-03 02:26:03,021 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-03 02:26:03,032 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:26:03,033 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:26:03,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:26:03,088 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;@26b883d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:26:03,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:26:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 269 states, 256 states have (on average 1.6796875) internal successors, (430), 264 states have internal predecessors, (430), 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 02:26:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-03 02:26:03,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:03,104 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 02:26:03,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:03,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1572656626, now seen corresponding path program 1 times [2023-04-03 02:26:03,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:03,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844404176] [2023-04-03 02:26:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:03,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:26:03,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:03,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844404176] [2023-04-03 02:26:03,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844404176] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:03,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:03,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:03,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881273454] [2023-04-03 02:26:03,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:03,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:03,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:03,698 INFO L87 Difference]: Start difference. First operand has 269 states, 256 states have (on average 1.6796875) internal successors, (430), 264 states have internal predecessors, (430), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 34.333333333333336) 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 02:26:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:03,866 INFO L93 Difference]: Finished difference Result 454 states and 709 transitions. [2023-04-03 02:26:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:26:03,868 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 02:26:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:03,882 INFO L225 Difference]: With dead ends: 454 [2023-04-03 02:26:03,882 INFO L226 Difference]: Without dead ends: 331 [2023-04-03 02:26:03,885 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 02:26:03,889 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 153 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 879 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 02:26:03,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 879 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-04-03 02:26:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 329. [2023-04-03 02:26:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.4953846153846153) internal successors, (486), 325 states have internal predecessors, (486), 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 02:26:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 489 transitions. [2023-04-03 02:26:03,959 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 489 transitions. Word has length 106 [2023-04-03 02:26:03,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:03,960 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 489 transitions. [2023-04-03 02:26:03,960 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 02:26:03,960 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 489 transitions. [2023-04-03 02:26:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-03 02:26:03,965 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:03,965 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] [2023-04-03 02:26:03,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:26:03,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:03,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1114860598, now seen corresponding path program 1 times [2023-04-03 02:26:03,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:03,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879483890] [2023-04-03 02:26:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:03,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:04,138 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 02:26:04,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:04,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879483890] [2023-04-03 02:26:04,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879483890] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:04,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:04,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:04,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144802568] [2023-04-03 02:26:04,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:04,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:04,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:04,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:04,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:04,142 INFO L87 Difference]: Start difference. First operand 329 states and 489 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 02:26:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:04,222 INFO L93 Difference]: Finished difference Result 581 states and 878 transitions. [2023-04-03 02:26:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:26:04,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 108 [2023-04-03 02:26:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:04,230 INFO L225 Difference]: With dead ends: 581 [2023-04-03 02:26:04,238 INFO L226 Difference]: Without dead ends: 420 [2023-04-03 02:26:04,242 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 02:26:04,245 INFO L413 NwaCegarLoop]: 345 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, 650 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 02:26:04,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 650 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2023-04-03 02:26:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 418. [2023-04-03 02:26:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 414 states have (on average 1.5) internal successors, (621), 414 states have internal predecessors, (621), 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 02:26:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 624 transitions. [2023-04-03 02:26:04,259 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 624 transitions. Word has length 108 [2023-04-03 02:26:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:04,260 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 624 transitions. [2023-04-03 02:26:04,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 02:26:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 624 transitions. [2023-04-03 02:26:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 02:26:04,261 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:04,261 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 02:26:04,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:26:04,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:04,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:04,261 INFO L85 PathProgramCache]: Analyzing trace with hash -278617123, now seen corresponding path program 1 times [2023-04-03 02:26:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:04,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050410559] [2023-04-03 02:26:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:04,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:04,398 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 02:26:04,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:04,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050410559] [2023-04-03 02:26:04,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050410559] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:04,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:04,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:04,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177104382] [2023-04-03 02:26:04,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:04,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:04,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:04,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:04,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:04,400 INFO L87 Difference]: Start difference. First operand 418 states and 624 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 02:26:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:04,502 INFO L93 Difference]: Finished difference Result 863 states and 1307 transitions. [2023-04-03 02:26:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:26:04,502 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 02:26:04,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:04,505 INFO L225 Difference]: With dead ends: 863 [2023-04-03 02:26:04,505 INFO L226 Difference]: Without dead ends: 615 [2023-04-03 02:26:04,509 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 02:26:04,511 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 132 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 738 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 02:26:04,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 738 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-04-03 02:26:04,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 613. [2023-04-03 02:26:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 609 states have (on average 1.5073891625615763) internal successors, (918), 609 states have internal predecessors, (918), 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 02:26:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 921 transitions. [2023-04-03 02:26:04,550 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 921 transitions. Word has length 111 [2023-04-03 02:26:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:04,551 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 921 transitions. [2023-04-03 02:26:04,551 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 02:26:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 921 transitions. [2023-04-03 02:26:04,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-03 02:26:04,553 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:04,553 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] [2023-04-03 02:26:04,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:26:04,554 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:04,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:04,555 INFO L85 PathProgramCache]: Analyzing trace with hash 603566677, now seen corresponding path program 1 times [2023-04-03 02:26:04,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:04,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873111267] [2023-04-03 02:26:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:04,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:04,680 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 02:26:04,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:04,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873111267] [2023-04-03 02:26:04,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873111267] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:04,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:04,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:04,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909516637] [2023-04-03 02:26:04,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:04,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:04,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:04,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:04,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:04,682 INFO L87 Difference]: Start difference. First operand 613 states and 921 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 02:26:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:04,774 INFO L93 Difference]: Finished difference Result 1322 states and 2009 transitions. [2023-04-03 02:26:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:26:04,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 113 [2023-04-03 02:26:04,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:04,778 INFO L225 Difference]: With dead ends: 1322 [2023-04-03 02:26:04,778 INFO L226 Difference]: Without dead ends: 879 [2023-04-03 02:26:04,779 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 02:26:04,786 INFO L413 NwaCegarLoop]: 354 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, 667 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:26:04,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 667 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2023-04-03 02:26:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 877. [2023-04-03 02:26:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 873 states have (on average 1.5154639175257731) internal successors, (1323), 873 states have internal predecessors, (1323), 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 02:26:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1326 transitions. [2023-04-03 02:26:04,824 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1326 transitions. Word has length 113 [2023-04-03 02:26:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:04,825 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1326 transitions. [2023-04-03 02:26:04,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 02:26:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1326 transitions. [2023-04-03 02:26:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-03 02:26:04,826 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:04,826 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] [2023-04-03 02:26:04,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:26:04,826 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:04,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:04,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2067325624, now seen corresponding path program 1 times [2023-04-03 02:26:04,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:04,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677074034] [2023-04-03 02:26:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:04,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:04,939 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 02:26:04,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:04,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677074034] [2023-04-03 02:26:04,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677074034] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:04,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:04,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:04,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728844818] [2023-04-03 02:26:04,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:04,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:04,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:04,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:04,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:04,944 INFO L87 Difference]: Start difference. First operand 877 states and 1326 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 02:26:05,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:05,084 INFO L93 Difference]: Finished difference Result 2102 states and 3197 transitions. [2023-04-03 02:26:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:26:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 116 [2023-04-03 02:26:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:05,089 INFO L225 Difference]: With dead ends: 2102 [2023-04-03 02:26:05,089 INFO L226 Difference]: Without dead ends: 1413 [2023-04-03 02:26:05,090 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 02:26:05,091 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 126 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:26:05,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 711 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:26:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2023-04-03 02:26:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1411. [2023-04-03 02:26:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1407 states have (on average 1.511727078891258) internal successors, (2127), 1407 states have internal predecessors, (2127), 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 02:26:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 2130 transitions. [2023-04-03 02:26:05,178 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 2130 transitions. Word has length 116 [2023-04-03 02:26:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:05,178 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 2130 transitions. [2023-04-03 02:26:05,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 02:26:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 2130 transitions. [2023-04-03 02:26:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-03 02:26:05,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:05,179 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] [2023-04-03 02:26:05,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:26:05,179 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:05,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:05,180 INFO L85 PathProgramCache]: Analyzing trace with hash -264874686, now seen corresponding path program 1 times [2023-04-03 02:26:05,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:05,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454150039] [2023-04-03 02:26:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:05,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:05,317 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 02:26:05,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:05,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454150039] [2023-04-03 02:26:05,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454150039] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:05,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:05,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:05,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132864720] [2023-04-03 02:26:05,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:05,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:05,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:05,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:05,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:05,318 INFO L87 Difference]: Start difference. First operand 1411 states and 2130 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 02:26:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:05,513 INFO L93 Difference]: Finished difference Result 3341 states and 5075 transitions. [2023-04-03 02:26:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:26:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 118 [2023-04-03 02:26:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:05,520 INFO L225 Difference]: With dead ends: 3341 [2023-04-03 02:26:05,520 INFO L226 Difference]: Without dead ends: 2118 [2023-04-03 02:26:05,523 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 02:26:05,523 INFO L413 NwaCegarLoop]: 355 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, 669 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:26:05,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 669 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:26:05,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2023-04-03 02:26:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 2116. [2023-04-03 02:26:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2112 states have (on average 1.515625) internal successors, (3201), 2112 states have internal predecessors, (3201), 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 02:26:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 3204 transitions. [2023-04-03 02:26:05,650 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 3204 transitions. Word has length 118 [2023-04-03 02:26:05,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:05,650 INFO L495 AbstractCegarLoop]: Abstraction has 2116 states and 3204 transitions. [2023-04-03 02:26:05,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 02:26:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 3204 transitions. [2023-04-03 02:26:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-03 02:26:05,651 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:05,651 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] [2023-04-03 02:26:05,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:26:05,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:05,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1689839177, now seen corresponding path program 1 times [2023-04-03 02:26:05,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:05,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963055593] [2023-04-03 02:26:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:05,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:26:05,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:05,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963055593] [2023-04-03 02:26:05,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963055593] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:05,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:05,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:05,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240080903] [2023-04-03 02:26:05,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:05,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:05,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:05,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:05,728 INFO L87 Difference]: Start difference. First operand 2116 states and 3204 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 02:26:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:06,026 INFO L93 Difference]: Finished difference Result 5477 states and 8291 transitions. [2023-04-03 02:26:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:26:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 121 [2023-04-03 02:26:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:06,037 INFO L225 Difference]: With dead ends: 5477 [2023-04-03 02:26:06,038 INFO L226 Difference]: Without dead ends: 3567 [2023-04-03 02:26:06,041 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 02:26:06,042 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 120 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 684 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 02:26:06,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 684 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2023-04-03 02:26:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3565. [2023-04-03 02:26:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3561 states have (on average 1.5029486099410279) internal successors, (5352), 3561 states have internal predecessors, (5352), 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 02:26:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 5355 transitions. [2023-04-03 02:26:06,276 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 5355 transitions. Word has length 121 [2023-04-03 02:26:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:06,277 INFO L495 AbstractCegarLoop]: Abstraction has 3565 states and 5355 transitions. [2023-04-03 02:26:06,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 02:26:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 5355 transitions. [2023-04-03 02:26:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-03 02:26:06,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:06,278 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] [2023-04-03 02:26:06,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:26:06,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:06,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:06,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1173045632, now seen corresponding path program 1 times [2023-04-03 02:26:06,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:06,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017286246] [2023-04-03 02:26:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:06,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:26:06,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:06,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017286246] [2023-04-03 02:26:06,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017286246] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:06,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:06,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:06,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467565205] [2023-04-03 02:26:06,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:06,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:06,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:06,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:06,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:06,423 INFO L87 Difference]: Start difference. First operand 3565 states and 5355 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 02:26:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:06,795 INFO L93 Difference]: Finished difference Result 8852 states and 13349 transitions. [2023-04-03 02:26:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:26:06,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 123 [2023-04-03 02:26:06,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:06,811 INFO L225 Difference]: With dead ends: 8852 [2023-04-03 02:26:06,812 INFO L226 Difference]: Without dead ends: 5493 [2023-04-03 02:26:06,816 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 02:26:06,817 INFO L413 NwaCegarLoop]: 356 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, 671 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 02:26:06,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 671 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:26:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2023-04-03 02:26:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 5491. [2023-04-03 02:26:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5491 states, 5487 states have (on average 1.505194095133953) internal successors, (8259), 5487 states have internal predecessors, (8259), 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 02:26:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 8262 transitions. [2023-04-03 02:26:07,129 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 8262 transitions. Word has length 123 [2023-04-03 02:26:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:07,129 INFO L495 AbstractCegarLoop]: Abstraction has 5491 states and 8262 transitions. [2023-04-03 02:26:07,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 02:26:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 8262 transitions. [2023-04-03 02:26:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-03 02:26:07,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:07,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:26:07,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:26:07,130 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:07,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2116536961, now seen corresponding path program 1 times [2023-04-03 02:26:07,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:07,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451369505] [2023-04-03 02:26:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:07,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:07,276 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 02:26:07,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:07,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451369505] [2023-04-03 02:26:07,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451369505] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:07,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:07,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:26:07,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312124594] [2023-04-03 02:26:07,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:07,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:26:07,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:07,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:26:07,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:26:07,279 INFO L87 Difference]: Start difference. First operand 5491 states and 8262 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:26:08,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:08,071 INFO L93 Difference]: Finished difference Result 13735 states and 20722 transitions. [2023-04-03 02:26:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:26:08,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2023-04-03 02:26:08,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:08,100 INFO L225 Difference]: With dead ends: 13735 [2023-04-03 02:26:08,100 INFO L226 Difference]: Without dead ends: 8414 [2023-04-03 02:26:08,111 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 02:26:08,113 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 1011 mSDsluCounter, 2757 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 3119 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 02:26:08,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 3119 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:26:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2023-04-03 02:26:08,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 8357. [2023-04-03 02:26:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8353 states have (on average 1.5091583862085478) internal successors, (12606), 8353 states have internal predecessors, (12606), 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 02:26:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 12609 transitions. [2023-04-03 02:26:08,643 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 12609 transitions. Word has length 126 [2023-04-03 02:26:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:08,643 INFO L495 AbstractCegarLoop]: Abstraction has 8357 states and 12609 transitions. [2023-04-03 02:26:08,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:26:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 12609 transitions. [2023-04-03 02:26:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-03 02:26:08,645 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:08,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:26:08,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:26:08,647 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:08,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:08,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1254304644, now seen corresponding path program 1 times [2023-04-03 02:26:08,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:08,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407417205] [2023-04-03 02:26:08,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:08,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:08,799 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 02:26:08,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:08,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407417205] [2023-04-03 02:26:08,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407417205] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:08,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:08,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:26:08,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825295960] [2023-04-03 02:26:08,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:08,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:26:08,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:26:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:26:08,800 INFO L87 Difference]: Start difference. First operand 8357 states and 12609 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 02:26:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:09,407 INFO L93 Difference]: Finished difference Result 16492 states and 24896 transitions. [2023-04-03 02:26:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:26:09,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 127 [2023-04-03 02:26:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:09,438 INFO L225 Difference]: With dead ends: 16492 [2023-04-03 02:26:09,438 INFO L226 Difference]: Without dead ends: 8359 [2023-04-03 02:26:09,452 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 02:26:09,452 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 246 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1007 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 02:26:09,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1007 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8359 states. [2023-04-03 02:26:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8359 to 8350. [2023-04-03 02:26:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8350 states, 8346 states have (on average 1.5055116223340523) internal successors, (12565), 8346 states have internal predecessors, (12565), 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 02:26:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8350 states to 8350 states and 12568 transitions. [2023-04-03 02:26:10,125 INFO L78 Accepts]: Start accepts. Automaton has 8350 states and 12568 transitions. Word has length 127 [2023-04-03 02:26:10,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:10,125 INFO L495 AbstractCegarLoop]: Abstraction has 8350 states and 12568 transitions. [2023-04-03 02:26:10,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 02:26:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8350 states and 12568 transitions. [2023-04-03 02:26:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-03 02:26:10,127 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:10,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:26:10,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:26:10,128 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:10,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash -517340038, now seen corresponding path program 1 times [2023-04-03 02:26:10,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:10,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881265392] [2023-04-03 02:26:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:10,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:10,506 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 02:26:10,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:10,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881265392] [2023-04-03 02:26:10,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881265392] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:10,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:10,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:26:10,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683541956] [2023-04-03 02:26:10,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:10,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:26:10,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:10,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:26:10,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:26:10,508 INFO L87 Difference]: Start difference. First operand 8350 states and 12568 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 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 02:26:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:11,460 INFO L93 Difference]: Finished difference Result 13438 states and 20024 transitions. [2023-04-03 02:26:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:26:11,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 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 136 [2023-04-03 02:26:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:11,487 INFO L225 Difference]: With dead ends: 13438 [2023-04-03 02:26:11,488 INFO L226 Difference]: Without dead ends: 13436 [2023-04-03 02:26:11,492 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 02:26:11,492 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 255 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1642 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 02:26:11,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1642 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2023-04-03 02:26:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 8474. [2023-04-03 02:26:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8474 states, 8470 states have (on average 1.4894923258559623) internal successors, (12616), 8470 states have internal predecessors, (12616), 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 02:26:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8474 states to 8474 states and 12619 transitions. [2023-04-03 02:26:12,129 INFO L78 Accepts]: Start accepts. Automaton has 8474 states and 12619 transitions. Word has length 136 [2023-04-03 02:26:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:12,129 INFO L495 AbstractCegarLoop]: Abstraction has 8474 states and 12619 transitions. [2023-04-03 02:26:12,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 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 02:26:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8474 states and 12619 transitions. [2023-04-03 02:26:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-03 02:26:12,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:12,130 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, 1, 1, 1, 1] [2023-04-03 02:26:12,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:26:12,131 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:12,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash 581355926, now seen corresponding path program 1 times [2023-04-03 02:26:12,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:12,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733494282] [2023-04-03 02:26:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:12,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:14,448 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 02:26:14,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:14,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733494282] [2023-04-03 02:26:14,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733494282] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:26:14,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187829802] [2023-04-03 02:26:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:14,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:26:14,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:26:14,451 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 02:26:14,456 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 02:26:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:14,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 02:26:14,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:26:14,897 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 02:26:14,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:26:14,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187829802] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:14,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:26:14,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16] total 18 [2023-04-03 02:26:14,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631253719] [2023-04-03 02:26:14,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:14,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:26:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:26:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:26:14,900 INFO L87 Difference]: Start difference. First operand 8474 states and 12619 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:26:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:16,379 INFO L93 Difference]: Finished difference Result 25021 states and 37255 transitions. [2023-04-03 02:26:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:26:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2023-04-03 02:26:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:16,419 INFO L225 Difference]: With dead ends: 25021 [2023-04-03 02:26:16,420 INFO L226 Difference]: Without dead ends: 16570 [2023-04-03 02:26:16,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:26:16,437 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 856 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 774 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 02:26:16,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 774 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16570 states. [2023-04-03 02:26:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16570 to 16568. [2023-04-03 02:26:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16568 states, 16564 states have (on average 1.483578845689447) internal successors, (24574), 16564 states have internal predecessors, (24574), 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 02:26:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16568 states to 16568 states and 24577 transitions. [2023-04-03 02:26:17,793 INFO L78 Accepts]: Start accepts. Automaton has 16568 states and 24577 transitions. Word has length 145 [2023-04-03 02:26:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:17,793 INFO L495 AbstractCegarLoop]: Abstraction has 16568 states and 24577 transitions. [2023-04-03 02:26:17,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:26:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand 16568 states and 24577 transitions. [2023-04-03 02:26:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-03 02:26:17,795 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:17,795 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, 1, 1, 1, 1, 1, 1] [2023-04-03 02:26:17,815 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 02:26:18,003 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 02:26:18,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:18,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash 38511926, now seen corresponding path program 1 times [2023-04-03 02:26:18,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:18,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172167726] [2023-04-03 02:26:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:18,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:18,098 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 02:26:18,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:18,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172167726] [2023-04-03 02:26:18,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172167726] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:18,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:18,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32185701] [2023-04-03 02:26:18,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:18,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:18,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:18,101 INFO L87 Difference]: Start difference. First operand 16568 states and 24577 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 02:26:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:20,785 INFO L93 Difference]: Finished difference Result 48646 states and 72135 transitions. [2023-04-03 02:26:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:26:20,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 147 [2023-04-03 02:26:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:20,859 INFO L225 Difference]: With dead ends: 48646 [2023-04-03 02:26:20,859 INFO L226 Difference]: Without dead ends: 32197 [2023-04-03 02:26:20,887 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 02:26:20,888 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 241 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 980 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 02:26:20,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 980 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32197 states. [2023-04-03 02:26:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32197 to 32195. [2023-04-03 02:26:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32195 states, 32191 states have (on average 1.476126867758069) internal successors, (47518), 32191 states have internal predecessors, (47518), 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 02:26:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32195 states to 32195 states and 47521 transitions. [2023-04-03 02:26:23,580 INFO L78 Accepts]: Start accepts. Automaton has 32195 states and 47521 transitions. Word has length 147 [2023-04-03 02:26:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:23,580 INFO L495 AbstractCegarLoop]: Abstraction has 32195 states and 47521 transitions. [2023-04-03 02:26:23,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 02:26:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 32195 states and 47521 transitions. [2023-04-03 02:26:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-03 02:26:23,583 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:23,583 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, 1, 1, 1, 1, 1, 1] [2023-04-03 02:26:23,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:26:23,583 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:23,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:23,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1408716931, now seen corresponding path program 1 times [2023-04-03 02:26:23,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:23,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862030531] [2023-04-03 02:26:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:23,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:23,647 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 02:26:23,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:23,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862030531] [2023-04-03 02:26:23,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862030531] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:23,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:23,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:23,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367649658] [2023-04-03 02:26:23,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:23,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:23,649 INFO L87 Difference]: Start difference. First operand 32195 states and 47521 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:26:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:29,449 INFO L93 Difference]: Finished difference Result 96467 states and 142381 transitions. [2023-04-03 02:26:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:26:29,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2023-04-03 02:26:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:29,623 INFO L225 Difference]: With dead ends: 96467 [2023-04-03 02:26:29,623 INFO L226 Difference]: Without dead ends: 64319 [2023-04-03 02:26:29,679 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 02:26:29,679 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 339 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 687 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 02:26:29,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 687 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64319 states. [2023-04-03 02:26:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64319 to 32207. [2023-04-03 02:26:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32207 states, 32203 states have (on average 1.476011551718784) internal successors, (47532), 32203 states have internal predecessors, (47532), 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 02:26:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32207 states to 32207 states and 47535 transitions. [2023-04-03 02:26:33,894 INFO L78 Accepts]: Start accepts. Automaton has 32207 states and 47535 transitions. Word has length 147 [2023-04-03 02:26:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:33,894 INFO L495 AbstractCegarLoop]: Abstraction has 32207 states and 47535 transitions. [2023-04-03 02:26:33,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:26:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 32207 states and 47535 transitions. [2023-04-03 02:26:33,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-03 02:26:33,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:33,897 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:26:33,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:26:33,897 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:33,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:33,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1506358685, now seen corresponding path program 1 times [2023-04-03 02:26:33,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:33,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684970543] [2023-04-03 02:26:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:33,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:35,460 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 02:26:35,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:35,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684970543] [2023-04-03 02:26:35,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684970543] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:26:35,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902197849] [2023-04-03 02:26:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:35,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:26:35,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:26:35,462 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 02:26:35,465 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 02:26:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:35,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 1351 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 02:26:35,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:26:35,874 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 02:26:35,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:26:35,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902197849] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:35,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:26:35,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-03 02:26:35,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238344304] [2023-04-03 02:26:35,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:35,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:26:35,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:26:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:26:35,875 INFO L87 Difference]: Start difference. First operand 32207 states and 47535 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:26:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:26:43,354 INFO L93 Difference]: Finished difference Result 95234 states and 140515 transitions. [2023-04-03 02:26:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:26:43,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2023-04-03 02:26:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:26:43,496 INFO L225 Difference]: With dead ends: 95234 [2023-04-03 02:26:43,496 INFO L226 Difference]: Without dead ends: 63166 [2023-04-03 02:26:43,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:26:43,541 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 787 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:26:43,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 719 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:26:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63166 states. [2023-04-03 02:26:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63166 to 63164. [2023-04-03 02:26:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63164 states, 63160 states have (on average 1.4709943001899937) internal successors, (92908), 63160 states have internal predecessors, (92908), 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 02:26:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63164 states to 63164 states and 92911 transitions. [2023-04-03 02:26:51,240 INFO L78 Accepts]: Start accepts. Automaton has 63164 states and 92911 transitions. Word has length 148 [2023-04-03 02:26:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:26:51,240 INFO L495 AbstractCegarLoop]: Abstraction has 63164 states and 92911 transitions. [2023-04-03 02:26:51,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:26:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 63164 states and 92911 transitions. [2023-04-03 02:26:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-03 02:26:51,245 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:26:51,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:26:51,252 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 02:26:51,452 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 02:26:51,452 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:26:51,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:26:51,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1976979052, now seen corresponding path program 1 times [2023-04-03 02:26:51,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:26:51,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504033161] [2023-04-03 02:26:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:26:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:26:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:26:51,537 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 02:26:51,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:26:51,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504033161] [2023-04-03 02:26:51,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504033161] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:26:51,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:26:51,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:26:51,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531691048] [2023-04-03 02:26:51,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:26:51,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:26:51,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:26:51,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:26:51,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:26:51,539 INFO L87 Difference]: Start difference. First operand 63164 states and 92911 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:06,812 INFO L93 Difference]: Finished difference Result 186397 states and 274090 transitions. [2023-04-03 02:27:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:06,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2023-04-03 02:27:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:07,084 INFO L225 Difference]: With dead ends: 186397 [2023-04-03 02:27:07,084 INFO L226 Difference]: Without dead ends: 123366 [2023-04-03 02:27:07,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:07,167 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 230 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:27:07,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 965 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:07,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123366 states. [2023-04-03 02:27:22,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123366 to 123364. [2023-04-03 02:27:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123364 states, 123360 states have (on average 1.4643158236057068) internal successors, (180638), 123360 states have internal predecessors, (180638), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123364 states to 123364 states and 180641 transitions. [2023-04-03 02:27:23,276 INFO L78 Accepts]: Start accepts. Automaton has 123364 states and 180641 transitions. Word has length 150 [2023-04-03 02:27:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:27:23,276 INFO L495 AbstractCegarLoop]: Abstraction has 123364 states and 180641 transitions. [2023-04-03 02:27:23,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 123364 states and 180641 transitions. [2023-04-03 02:27:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-03 02:27:23,283 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:27:23,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:27:23,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:27:23,283 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:27:23,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:27:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1856338267, now seen corresponding path program 1 times [2023-04-03 02:27:23,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:27:23,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090609185] [2023-04-03 02:27:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:27:23,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:27:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:27:23,349 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 02:27:23,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:27:23,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090609185] [2023-04-03 02:27:23,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090609185] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:27:23,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:27:23,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:27:23,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428446605] [2023-04-03 02:27:23,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:27:23,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:27:23,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:27:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:27:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:23,351 INFO L87 Difference]: Start difference. First operand 123364 states and 180641 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:27:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:27:57,105 INFO L93 Difference]: Finished difference Result 369637 states and 541240 transitions. [2023-04-03 02:27:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:27:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2023-04-03 02:27:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:27:57,967 INFO L225 Difference]: With dead ends: 369637 [2023-04-03 02:27:57,968 INFO L226 Difference]: Without dead ends: 246517 [2023-04-03 02:27:58,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:27:58,159 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 292 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 962 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 02:27:58,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 962 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:27:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246517 states. [2023-04-03 02:28:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246517 to 123379. [2023-04-03 02:28:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123379 states, 123375 states have (on average 1.46425937183384) internal successors, (180653), 123375 states have internal predecessors, (180653), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123379 states to 123379 states and 180656 transitions. [2023-04-03 02:28:17,468 INFO L78 Accepts]: Start accepts. Automaton has 123379 states and 180656 transitions. Word has length 150 [2023-04-03 02:28:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:28:17,468 INFO L495 AbstractCegarLoop]: Abstraction has 123379 states and 180656 transitions. [2023-04-03 02:28:17,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:28:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 123379 states and 180656 transitions. [2023-04-03 02:28:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-03 02:28:17,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:28:17,475 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:28:17,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:28:17,475 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:28:17,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:28:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash -430720550, now seen corresponding path program 1 times [2023-04-03 02:28:17,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:28:17,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460119874] [2023-04-03 02:28:17,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:17,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:28:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:19,183 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 02:28:19,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:28:19,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460119874] [2023-04-03 02:28:19,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460119874] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:28:19,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218756839] [2023-04-03 02:28:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:28:19,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:28:19,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:28:19,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:28:19,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:28:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:28:19,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 02:28:19,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:28:19,658 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 02:28:19,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:28:19,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218756839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:28:19,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:28:19,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-03 02:28:19,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026246768] [2023-04-03 02:28:19,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:28:19,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:28:19,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:28:19,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:28:19,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:28:19,660 INFO L87 Difference]: Start difference. First operand 123379 states and 180656 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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)