/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 IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:33:20,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:33:20,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:33:20,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 00:33:20,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 00:33:20,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 00:33:20,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 00:33:20,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 00:33:20,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 00:33:20,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 00:33:20,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 00:33:20,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 00:33:20,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:33:20,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:33:20,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:33:20,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:33:20,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:33:20,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:33:20,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:33:20,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:33:20,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:33:20,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:33:20,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:33:20,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:33:20,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 00:33:20,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:33:20,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:33:20,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:33:20,801 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 [2023-04-01 00:33:20,825 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:33:20,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:33:20,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:33:20,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:33:20,826 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:33:20,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:33:20,826 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:33:20,826 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:33:20,827 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:33:20,827 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:33:20,827 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:33:20,827 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:33:20,827 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:33:20,827 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:33:20,828 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:33:20,828 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:33:20,828 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:33:20,828 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:33:20,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:33:20,828 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:33:20,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:33:20,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:33:20,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:33:20,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:33:20,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:33:20,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:33:20,829 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:33:20,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:33:20,829 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:33:20,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:33:20,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:33:20,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:33:20,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:33:20,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:33:20,830 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:33:20,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:33:20,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:33:20,830 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:33:20,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:33:20,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:33:20,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:33:20,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:33:21,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:33:21,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:33:21,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:33:21,033 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:33:21,033 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:33:21,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-01 00:33:22,258 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:33:22,471 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:33:22,471 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-01 00:33:22,478 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7bd7fa60/4fcaf51f1d9740819042398fea4c2d21/FLAG07f69948f [2023-04-01 00:33:22,488 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7bd7fa60/4fcaf51f1d9740819042398fea4c2d21 [2023-04-01 00:33:22,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:33:22,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:33:22,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:33:22,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:33:22,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:33:22,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e8ebeb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22, skipping insertion in model container [2023-04-01 00:33:22,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:33:22,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:33:22,708 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[7543,7556] [2023-04-01 00:33:22,722 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[10430,10443] [2023-04-01 00:33:22,727 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[11521,11534] [2023-04-01 00:33:22,730 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[12127,12140] [2023-04-01 00:33:22,741 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[13546,13559] [2023-04-01 00:33:22,744 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[14152,14165] [2023-04-01 00:33:22,749 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15123,15136] [2023-04-01 00:33:22,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:33:22,804 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:33:22,874 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[7543,7556] [2023-04-01 00:33:22,884 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[10430,10443] [2023-04-01 00:33:22,887 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[11521,11534] [2023-04-01 00:33:22,890 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[12127,12140] [2023-04-01 00:33:22,893 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[13546,13559] [2023-04-01 00:33:22,895 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[14152,14165] [2023-04-01 00:33:22,898 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15123,15136] [2023-04-01 00:33:22,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:33:22,927 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:33:22,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22 WrapperNode [2023-04-01 00:33:22,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:33:22,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:33:22,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:33:22,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:33:22,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,987 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:33:22,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:33:22,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:33:22,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:33:22,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22" (1/1) ... [2023-04-01 00:33:22,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:33:23,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:33:23,017 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) [2023-04-01 00:33:23,036 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 [2023-04-01 00:33:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:33:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:33:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:33:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:33:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:33:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:33:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:33:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:33:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:33:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:33:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:33:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:33:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:33:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:33:23,137 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:33:23,139 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:33:23,705 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:33:23,760 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:33:23,760 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:33:23,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:33:23 BoogieIcfgContainer [2023-04-01 00:33:23,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:33:23,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:33:23,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:33:23,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:33:23,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:33:22" (1/3) ... [2023-04-01 00:33:23,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f5649e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:33:23, skipping insertion in model container [2023-04-01 00:33:23,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:33:22" (2/3) ... [2023-04-01 00:33:23,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f5649e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:33:23, skipping insertion in model container [2023-04-01 00:33:23,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:33:23" (3/3) ... [2023-04-01 00:33:23,770 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-01 00:33:23,784 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:33:23,784 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-04-01 00:33:23,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:33:23,841 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;@2bbacc4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:33:23,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-04-01 00:33:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 186 states have (on average 1.8279569892473118) internal successors, (340), 194 states have internal predecessors, (340), 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) [2023-04-01 00:33:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 00:33:23,855 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:23,856 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] [2023-04-01 00:33:23,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:23,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:23,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1048592059, now seen corresponding path program 1 times [2023-04-01 00:33:23,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:23,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148061980] [2023-04-01 00:33:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:23,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:24,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:24,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148061980] [2023-04-01 00:33:24,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148061980] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:24,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:24,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:33:24,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189143599] [2023-04-01 00:33:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:24,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:33:24,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:24,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:33:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:33:24,372 INFO L87 Difference]: Start difference. First operand has 199 states, 186 states have (on average 1.8279569892473118) internal successors, (340), 194 states have internal predecessors, (340), 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 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2023-04-01 00:33:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:24,587 INFO L93 Difference]: Finished difference Result 322 states and 531 transitions. [2023-04-01 00:33:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:33:24,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-01 00:33:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:24,597 INFO L225 Difference]: With dead ends: 322 [2023-04-01 00:33:24,598 INFO L226 Difference]: Without dead ends: 168 [2023-04-01 00:33:24,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:33:24,605 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 779 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:24,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 231 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:33:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-04-01 00:33:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-04-01 00:33:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 158 states have (on average 1.2341772151898733) internal successors, (195), 164 states have internal predecessors, (195), 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) [2023-04-01 00:33:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 198 transitions. [2023-04-01 00:33:24,657 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 198 transitions. Word has length 50 [2023-04-01 00:33:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:24,658 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 198 transitions. [2023-04-01 00:33:24,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2023-04-01 00:33:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 198 transitions. [2023-04-01 00:33:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 00:33:24,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:24,666 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] [2023-04-01 00:33:24,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:33:24,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:24,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash -808629400, now seen corresponding path program 1 times [2023-04-01 00:33:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:24,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227498930] [2023-04-01 00:33:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:24,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:24,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:24,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227498930] [2023-04-01 00:33:24,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227498930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:24,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:24,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:33:24,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913153197] [2023-04-01 00:33:24,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:24,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:33:24,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:24,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:33:24,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:33:24,845 INFO L87 Difference]: Start difference. First operand 168 states and 198 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-04-01 00:33:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:24,971 INFO L93 Difference]: Finished difference Result 278 states and 335 transitions. [2023-04-01 00:33:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:33:24,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-01 00:33:24,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:24,975 INFO L225 Difference]: With dead ends: 278 [2023-04-01 00:33:24,975 INFO L226 Difference]: Without dead ends: 158 [2023-04-01 00:33:24,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:33:24,978 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 491 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:24,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 126 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:33:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-04-01 00:33:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2023-04-01 00:33:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 148 states have (on average 1.2297297297297298) internal successors, (182), 154 states have internal predecessors, (182), 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) [2023-04-01 00:33:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 185 transitions. [2023-04-01 00:33:24,994 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 185 transitions. Word has length 51 [2023-04-01 00:33:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:24,994 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 185 transitions. [2023-04-01 00:33:24,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-04-01 00:33:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 185 transitions. [2023-04-01 00:33:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 00:33:24,998 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:24,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:24,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:33:24,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:24,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:24,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1720600761, now seen corresponding path program 1 times [2023-04-01 00:33:24,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:24,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57290629] [2023-04-01 00:33:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:24,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:25,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:25,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57290629] [2023-04-01 00:33:25,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57290629] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:25,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:25,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:33:25,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693297242] [2023-04-01 00:33:25,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:25,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:33:25,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:25,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:33:25,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:33:25,117 INFO L87 Difference]: Start difference. First operand 158 states and 185 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:25,211 INFO L93 Difference]: Finished difference Result 268 states and 321 transitions. [2023-04-01 00:33:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:33:25,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-04-01 00:33:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:25,212 INFO L225 Difference]: With dead ends: 268 [2023-04-01 00:33:25,213 INFO L226 Difference]: Without dead ends: 147 [2023-04-01 00:33:25,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:33:25,215 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 476 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:25,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 112 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:33:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-01 00:33:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-04-01 00:33:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 137 states have (on average 1.2335766423357664) internal successors, (169), 143 states have internal predecessors, (169), 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) [2023-04-01 00:33:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2023-04-01 00:33:25,236 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 52 [2023-04-01 00:33:25,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:25,237 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2023-04-01 00:33:25,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2023-04-01 00:33:25,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 00:33:25,238 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:25,238 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] [2023-04-01 00:33:25,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:33:25,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:25,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:25,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1635505726, now seen corresponding path program 1 times [2023-04-01 00:33:25,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:25,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452568128] [2023-04-01 00:33:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:25,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:25,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:25,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452568128] [2023-04-01 00:33:25,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452568128] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:25,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:25,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 00:33:25,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647896292] [2023-04-01 00:33:25,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:25,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 00:33:25,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 00:33:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 00:33:25,557 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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) [2023-04-01 00:33:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:25,825 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2023-04-01 00:33:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 00:33:25,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 00:33:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:25,827 INFO L225 Difference]: With dead ends: 276 [2023-04-01 00:33:25,827 INFO L226 Difference]: Without dead ends: 206 [2023-04-01 00:33:25,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-04-01 00:33:25,828 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 970 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:25,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 278 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:33:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-04-01 00:33:25,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2023-04-01 00:33:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 137 states have (on average 1.2262773722627738) internal successors, (168), 143 states have internal predecessors, (168), 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) [2023-04-01 00:33:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2023-04-01 00:33:25,838 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 53 [2023-04-01 00:33:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:25,838 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2023-04-01 00:33:25,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 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) [2023-04-01 00:33:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2023-04-01 00:33:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 00:33:25,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:25,839 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] [2023-04-01 00:33:25,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:33:25,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:25,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1138394409, now seen corresponding path program 1 times [2023-04-01 00:33:25,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:25,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905253689] [2023-04-01 00:33:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:25,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:26,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:26,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905253689] [2023-04-01 00:33:26,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905253689] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:26,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:26,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:33:26,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447802250] [2023-04-01 00:33:26,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:26,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:33:26,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:26,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:33:26,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:33:26,038 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 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) [2023-04-01 00:33:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:26,447 INFO L93 Difference]: Finished difference Result 329 states and 397 transitions. [2023-04-01 00:33:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:33:26,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 00:33:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:26,470 INFO L225 Difference]: With dead ends: 329 [2023-04-01 00:33:26,470 INFO L226 Difference]: Without dead ends: 282 [2023-04-01 00:33:26,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:33:26,471 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 936 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:26,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 592 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:33:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-04-01 00:33:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 147. [2023-04-01 00:33:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 137 states have (on average 1.218978102189781) internal successors, (167), 143 states have internal predecessors, (167), 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) [2023-04-01 00:33:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2023-04-01 00:33:26,488 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 53 [2023-04-01 00:33:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:26,488 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2023-04-01 00:33:26,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 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) [2023-04-01 00:33:26,488 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2023-04-01 00:33:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 00:33:26,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:26,489 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] [2023-04-01 00:33:26,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:33:26,489 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:26,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:26,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1695827209, now seen corresponding path program 1 times [2023-04-01 00:33:26,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:26,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478919697] [2023-04-01 00:33:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:26,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:26,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:26,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478919697] [2023-04-01 00:33:26,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478919697] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:26,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:26,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:33:26,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001534440] [2023-04-01 00:33:26,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:26,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:33:26,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:26,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:33:26,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:33:26,723 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 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) [2023-04-01 00:33:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:27,104 INFO L93 Difference]: Finished difference Result 283 states and 336 transitions. [2023-04-01 00:33:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:33:27,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 00:33:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:27,106 INFO L225 Difference]: With dead ends: 283 [2023-04-01 00:33:27,106 INFO L226 Difference]: Without dead ends: 278 [2023-04-01 00:33:27,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:33:27,107 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 854 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:27,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 599 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:33:27,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-04-01 00:33:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 147. [2023-04-01 00:33:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 137 states have (on average 1.2116788321167884) internal successors, (166), 143 states have internal predecessors, (166), 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) [2023-04-01 00:33:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2023-04-01 00:33:27,120 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 53 [2023-04-01 00:33:27,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:27,121 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2023-04-01 00:33:27,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 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) [2023-04-01 00:33:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2023-04-01 00:33:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 00:33:27,121 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:27,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:27,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:33:27,121 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:27,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:27,122 INFO L85 PathProgramCache]: Analyzing trace with hash 242533029, now seen corresponding path program 1 times [2023-04-01 00:33:27,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:27,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819938855] [2023-04-01 00:33:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:27,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:27,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:27,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819938855] [2023-04-01 00:33:27,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819938855] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:27,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:27,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-01 00:33:27,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835519355] [2023-04-01 00:33:27,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:27,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 00:33:27,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:27,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 00:33:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-04-01 00:33:27,893 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:29,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:29,217 INFO L93 Difference]: Finished difference Result 382 states and 446 transitions. [2023-04-01 00:33:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 00:33:29,218 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 00:33:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:29,220 INFO L225 Difference]: With dead ends: 382 [2023-04-01 00:33:29,220 INFO L226 Difference]: Without dead ends: 348 [2023-04-01 00:33:29,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 00:33:29,221 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1225 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:29,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 2342 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 00:33:29,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-04-01 00:33:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 153. [2023-04-01 00:33:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 143 states have (on average 1.2167832167832169) internal successors, (174), 149 states have internal predecessors, (174), 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) [2023-04-01 00:33:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2023-04-01 00:33:29,241 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 55 [2023-04-01 00:33:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:29,241 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2023-04-01 00:33:29,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2023-04-01 00:33:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 00:33:29,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:29,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:29,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:33:29,244 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:29,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:29,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2041208538, now seen corresponding path program 1 times [2023-04-01 00:33:29,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:29,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401156423] [2023-04-01 00:33:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:29,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:29,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:29,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401156423] [2023-04-01 00:33:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401156423] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:29,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:29,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:33:29,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694280631] [2023-04-01 00:33:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:29,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:33:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:33:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:33:29,673 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:30,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:30,340 INFO L93 Difference]: Finished difference Result 322 states and 387 transitions. [2023-04-01 00:33:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:33:30,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 00:33:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:30,342 INFO L225 Difference]: With dead ends: 322 [2023-04-01 00:33:30,342 INFO L226 Difference]: Without dead ends: 281 [2023-04-01 00:33:30,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:33:30,343 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 738 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:30,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 1381 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:33:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-04-01 00:33:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 142. [2023-04-01 00:33:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 133 states have (on average 1.2105263157894737) internal successors, (161), 138 states have internal predecessors, (161), 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) [2023-04-01 00:33:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2023-04-01 00:33:30,366 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 55 [2023-04-01 00:33:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:30,367 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2023-04-01 00:33:30,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2023-04-01 00:33:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 00:33:30,382 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:30,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:30,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:33:30,382 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:30,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:30,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1393391483, now seen corresponding path program 1 times [2023-04-01 00:33:30,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:30,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070997525] [2023-04-01 00:33:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:30,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:31,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:31,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070997525] [2023-04-01 00:33:31,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070997525] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:31,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:31,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-01 00:33:31,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622632432] [2023-04-01 00:33:31,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:31,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 00:33:31,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 00:33:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-04-01 00:33:31,125 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:32,386 INFO L93 Difference]: Finished difference Result 334 states and 387 transitions. [2023-04-01 00:33:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 00:33:32,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 00:33:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:32,388 INFO L225 Difference]: With dead ends: 334 [2023-04-01 00:33:32,388 INFO L226 Difference]: Without dead ends: 330 [2023-04-01 00:33:32,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 00:33:32,389 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 1015 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:32,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 2175 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 00:33:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-04-01 00:33:32,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 152. [2023-04-01 00:33:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 143 states have (on average 1.2307692307692308) internal successors, (176), 148 states have internal predecessors, (176), 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) [2023-04-01 00:33:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 179 transitions. [2023-04-01 00:33:32,411 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 179 transitions. Word has length 55 [2023-04-01 00:33:32,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:32,412 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 179 transitions. [2023-04-01 00:33:32,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 179 transitions. [2023-04-01 00:33:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 00:33:32,412 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:32,412 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] [2023-04-01 00:33:32,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:33:32,413 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:32,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1057706630, now seen corresponding path program 1 times [2023-04-01 00:33:32,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:32,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167708455] [2023-04-01 00:33:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:32,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:32,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:32,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167708455] [2023-04-01 00:33:32,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167708455] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:32,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:32,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:33:32,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635103250] [2023-04-01 00:33:32,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:32,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:33:32,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:33:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:33:32,770 INFO L87 Difference]: Start difference. First operand 152 states and 179 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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) [2023-04-01 00:33:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:33,303 INFO L93 Difference]: Finished difference Result 359 states and 437 transitions. [2023-04-01 00:33:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 00:33:33,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 56 [2023-04-01 00:33:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:33,304 INFO L225 Difference]: With dead ends: 359 [2023-04-01 00:33:33,304 INFO L226 Difference]: Without dead ends: 339 [2023-04-01 00:33:33,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-01 00:33:33,305 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 802 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:33,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 1351 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:33:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-04-01 00:33:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 126. [2023-04-01 00:33:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 122 states have internal predecessors, (143), 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) [2023-04-01 00:33:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2023-04-01 00:33:33,327 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 56 [2023-04-01 00:33:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:33,327 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2023-04-01 00:33:33,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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) [2023-04-01 00:33:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2023-04-01 00:33:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 00:33:33,328 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:33,328 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] [2023-04-01 00:33:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:33:33,328 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:33,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2125542200, now seen corresponding path program 1 times [2023-04-01 00:33:33,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:33,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366756019] [2023-04-01 00:33:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:33,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:33,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:33,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366756019] [2023-04-01 00:33:33,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366756019] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:33,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:33:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579186838] [2023-04-01 00:33:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:33,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:33:33,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:33,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:33:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:33:33,497 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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) [2023-04-01 00:33:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:33,854 INFO L93 Difference]: Finished difference Result 254 states and 301 transitions. [2023-04-01 00:33:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:33:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 00:33:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:33,856 INFO L225 Difference]: With dead ends: 254 [2023-04-01 00:33:33,856 INFO L226 Difference]: Without dead ends: 247 [2023-04-01 00:33:33,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2023-04-01 00:33:33,856 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 525 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:33,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 602 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:33:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-04-01 00:33:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 126. [2023-04-01 00:33:33,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 119 states have (on average 1.184873949579832) internal successors, (141), 122 states have internal predecessors, (141), 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) [2023-04-01 00:33:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2023-04-01 00:33:33,878 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 56 [2023-04-01 00:33:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:33,879 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2023-04-01 00:33:33,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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) [2023-04-01 00:33:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2023-04-01 00:33:33,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 00:33:33,879 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:33,879 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] [2023-04-01 00:33:33,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 00:33:33,879 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:33,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash -838701397, now seen corresponding path program 1 times [2023-04-01 00:33:33,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:33,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535349728] [2023-04-01 00:33:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:33,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:34,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:34,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535349728] [2023-04-01 00:33:34,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535349728] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:34,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:34,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:33:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673009328] [2023-04-01 00:33:34,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:34,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:33:34,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:33:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:33:34,167 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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) [2023-04-01 00:33:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:34,583 INFO L93 Difference]: Finished difference Result 229 states and 264 transitions. [2023-04-01 00:33:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 00:33:34,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 56 [2023-04-01 00:33:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:34,584 INFO L225 Difference]: With dead ends: 229 [2023-04-01 00:33:34,584 INFO L226 Difference]: Without dead ends: 195 [2023-04-01 00:33:34,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:33:34,586 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 393 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:34,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 770 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:33:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-04-01 00:33:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 116. [2023-04-01 00:33:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 states have internal predecessors, (129), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2023-04-01 00:33:34,611 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 56 [2023-04-01 00:33:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:34,611 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2023-04-01 00:33:34,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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) [2023-04-01 00:33:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2023-04-01 00:33:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 00:33:34,612 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:34,612 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] [2023-04-01 00:33:34,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 00:33:34,612 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:34,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash 307731144, now seen corresponding path program 1 times [2023-04-01 00:33:34,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:34,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302804938] [2023-04-01 00:33:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:34,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:34,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302804938] [2023-04-01 00:33:34,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302804938] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:34,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:34,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:33:34,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695209213] [2023-04-01 00:33:34,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:34,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:33:34,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:33:34,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:33:34,773 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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) [2023-04-01 00:33:35,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:35,060 INFO L93 Difference]: Finished difference Result 221 states and 261 transitions. [2023-04-01 00:33:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:33:35,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 00:33:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:35,061 INFO L225 Difference]: With dead ends: 221 [2023-04-01 00:33:35,061 INFO L226 Difference]: Without dead ends: 173 [2023-04-01 00:33:35,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:33:35,063 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 435 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:35,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 385 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:33:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-04-01 00:33:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 116. [2023-04-01 00:33:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 112 states have internal predecessors, (128), 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) [2023-04-01 00:33:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2023-04-01 00:33:35,087 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 56 [2023-04-01 00:33:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:35,087 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2023-04-01 00:33:35,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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) [2023-04-01 00:33:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2023-04-01 00:33:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 00:33:35,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:35,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:35,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 00:33:35,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:35,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:35,088 INFO L85 PathProgramCache]: Analyzing trace with hash -857305633, now seen corresponding path program 1 times [2023-04-01 00:33:35,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:35,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058935334] [2023-04-01 00:33:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:35,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:35,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:35,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058935334] [2023-04-01 00:33:35,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058935334] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:35,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:35,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 00:33:35,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773816203] [2023-04-01 00:33:35,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:35,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 00:33:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 00:33:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:33:35,488 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:35,940 INFO L93 Difference]: Finished difference Result 245 states and 290 transitions. [2023-04-01 00:33:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 00:33:35,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 00:33:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:35,941 INFO L225 Difference]: With dead ends: 245 [2023-04-01 00:33:35,941 INFO L226 Difference]: Without dead ends: 227 [2023-04-01 00:33:35,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-01 00:33:35,942 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 588 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:35,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 642 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:33:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-04-01 00:33:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 98. [2023-04-01 00:33:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 94 states have internal predecessors, (108), 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) [2023-04-01 00:33:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2023-04-01 00:33:35,968 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 58 [2023-04-01 00:33:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:35,969 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2023-04-01 00:33:35,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2023-04-01 00:33:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 00:33:35,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:35,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:35,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 00:33:35,969 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:35,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:35,970 INFO L85 PathProgramCache]: Analyzing trace with hash 22564975, now seen corresponding path program 1 times [2023-04-01 00:33:35,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:35,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195225717] [2023-04-01 00:33:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:35,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:36,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:36,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195225717] [2023-04-01 00:33:36,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195225717] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:36,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:36,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 00:33:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940543494] [2023-04-01 00:33:36,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 00:33:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 00:33:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-04-01 00:33:36,540 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:37,549 INFO L93 Difference]: Finished difference Result 325 states and 390 transitions. [2023-04-01 00:33:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 00:33:37,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 00:33:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:37,551 INFO L225 Difference]: With dead ends: 325 [2023-04-01 00:33:37,551 INFO L226 Difference]: Without dead ends: 319 [2023-04-01 00:33:37,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2023-04-01 00:33:37,552 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 1006 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 2271 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:37,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 2271 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:33:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-04-01 00:33:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 109. [2023-04-01 00:33:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 105 states have internal predecessors, (122), 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) [2023-04-01 00:33:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2023-04-01 00:33:37,593 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 58 [2023-04-01 00:33:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:37,593 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2023-04-01 00:33:37,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2023-04-01 00:33:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 00:33:37,594 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:37,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:37,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 00:33:37,594 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:37,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:37,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1726155610, now seen corresponding path program 1 times [2023-04-01 00:33:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:37,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848877389] [2023-04-01 00:33:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:37,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:37,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:37,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848877389] [2023-04-01 00:33:37,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848877389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:37,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:37,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:33:37,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094306725] [2023-04-01 00:33:37,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:37,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:33:37,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:37,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:33:37,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:33:37,997 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 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) [2023-04-01 00:33:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:38,539 INFO L93 Difference]: Finished difference Result 226 states and 272 transitions. [2023-04-01 00:33:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 00:33:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 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 59 [2023-04-01 00:33:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:38,540 INFO L225 Difference]: With dead ends: 226 [2023-04-01 00:33:38,540 INFO L226 Difference]: Without dead ends: 220 [2023-04-01 00:33:38,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-01 00:33:38,541 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 456 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:38,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1007 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:33:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-04-01 00:33:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 92. [2023-04-01 00:33:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 88 states have internal predecessors, (102), 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) [2023-04-01 00:33:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2023-04-01 00:33:38,570 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 59 [2023-04-01 00:33:38,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:38,570 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2023-04-01 00:33:38,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 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) [2023-04-01 00:33:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2023-04-01 00:33:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 00:33:38,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:38,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:38,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 00:33:38,571 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:38,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1051657500, now seen corresponding path program 1 times [2023-04-01 00:33:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:38,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221775627] [2023-04-01 00:33:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:38,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:38,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:38,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221775627] [2023-04-01 00:33:38,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221775627] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:38,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:38,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:33:38,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971085859] [2023-04-01 00:33:38,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:38,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:33:38,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:33:38,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:33:38,668 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:38,726 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2023-04-01 00:33:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:33:38,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-01 00:33:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:38,727 INFO L225 Difference]: With dead ends: 152 [2023-04-01 00:33:38,727 INFO L226 Difference]: Without dead ends: 122 [2023-04-01 00:33:38,727 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 [2023-04-01 00:33:38,729 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 44 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:38,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 198 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:33:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-04-01 00:33:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2023-04-01 00:33:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 112 states have internal predecessors, (134), 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) [2023-04-01 00:33:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2023-04-01 00:33:38,773 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 70 [2023-04-01 00:33:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:38,773 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2023-04-01 00:33:38,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:33:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2023-04-01 00:33:38,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:33:38,773 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:38,774 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] [2023-04-01 00:33:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 00:33:38,774 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:38,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1331227676, now seen corresponding path program 1 times [2023-04-01 00:33:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:38,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673479147] [2023-04-01 00:33:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:38,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:38,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:38,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673479147] [2023-04-01 00:33:38,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673479147] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:38,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:38,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:33:38,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239521249] [2023-04-01 00:33:38,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:38,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:33:38,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:38,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:33:38,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:33:38,841 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2023-04-01 00:33:38,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:38,930 INFO L93 Difference]: Finished difference Result 224 states and 279 transitions. [2023-04-01 00:33:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:33:38,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 73 [2023-04-01 00:33:38,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:38,931 INFO L225 Difference]: With dead ends: 224 [2023-04-01 00:33:38,931 INFO L226 Difference]: Without dead ends: 170 [2023-04-01 00:33:38,931 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 [2023-04-01 00:33:38,931 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:38,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 198 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:33:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-04-01 00:33:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2023-04-01 00:33:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.2307692307692308) internal successors, (192), 156 states have internal predecessors, (192), 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) [2023-04-01 00:33:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 195 transitions. [2023-04-01 00:33:39,046 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 195 transitions. Word has length 73 [2023-04-01 00:33:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:39,046 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 195 transitions. [2023-04-01 00:33:39,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2023-04-01 00:33:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 195 transitions. [2023-04-01 00:33:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 00:33:39,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:39,047 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] [2023-04-01 00:33:39,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 00:33:39,047 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:39,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2081682476, now seen corresponding path program 1 times [2023-04-01 00:33:39,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:39,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190208722] [2023-04-01 00:33:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:39,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:39,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:39,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190208722] [2023-04-01 00:33:39,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190208722] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:39,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:39,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:33:39,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747961926] [2023-04-01 00:33:39,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:39,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:33:39,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:39,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:33:39,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:33:39,131 INFO L87 Difference]: Start difference. First operand 160 states and 195 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2023-04-01 00:33:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:39,284 INFO L93 Difference]: Finished difference Result 356 states and 453 transitions. [2023-04-01 00:33:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:33:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 76 [2023-04-01 00:33:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:39,285 INFO L225 Difference]: With dead ends: 356 [2023-04-01 00:33:39,285 INFO L226 Difference]: Without dead ends: 258 [2023-04-01 00:33:39,286 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 [2023-04-01 00:33:39,286 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 27 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:39,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 198 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:33:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-04-01 00:33:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 240. [2023-04-01 00:33:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 236 states have (on average 1.2542372881355932) internal successors, (296), 236 states have internal predecessors, (296), 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) [2023-04-01 00:33:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 299 transitions. [2023-04-01 00:33:39,440 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 299 transitions. Word has length 76 [2023-04-01 00:33:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:39,440 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 299 transitions. [2023-04-01 00:33:39,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2023-04-01 00:33:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 299 transitions. [2023-04-01 00:33:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 00:33:39,440 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:39,441 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] [2023-04-01 00:33:39,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 00:33:39,441 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:39,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:39,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1643064189, now seen corresponding path program 1 times [2023-04-01 00:33:39,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:39,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387973772] [2023-04-01 00:33:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:39,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:39,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:39,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387973772] [2023-04-01 00:33:39,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387973772] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:39,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:39,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:33:39,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107620518] [2023-04-01 00:33:39,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:39,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:33:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:33:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:33:39,500 INFO L87 Difference]: Start difference. First operand 240 states and 299 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2023-04-01 00:33:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:40,050 INFO L93 Difference]: Finished difference Result 817 states and 1038 transitions. [2023-04-01 00:33:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 00:33:40,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 79 [2023-04-01 00:33:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:40,053 INFO L225 Difference]: With dead ends: 817 [2023-04-01 00:33:40,053 INFO L226 Difference]: Without dead ends: 639 [2023-04-01 00:33:40,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 00:33:40,053 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 298 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:40,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 400 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:33:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-04-01 00:33:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 348. [2023-04-01 00:33:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.244186046511628) internal successors, (428), 344 states have internal predecessors, (428), 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) [2023-04-01 00:33:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 431 transitions. [2023-04-01 00:33:40,268 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 431 transitions. Word has length 79 [2023-04-01 00:33:40,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:40,269 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 431 transitions. [2023-04-01 00:33:40,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2023-04-01 00:33:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 431 transitions. [2023-04-01 00:33:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 00:33:40,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:40,269 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] [2023-04-01 00:33:40,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 00:33:40,270 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:40,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:40,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1129547525, now seen corresponding path program 1 times [2023-04-01 00:33:40,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:40,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348302314] [2023-04-01 00:33:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:40,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:40,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:40,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348302314] [2023-04-01 00:33:40,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348302314] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:40,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:40,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:33:40,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556413397] [2023-04-01 00:33:40,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:40,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:33:40,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:40,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:33:40,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:33:40,401 INFO L87 Difference]: Start difference. First operand 348 states and 431 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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) [2023-04-01 00:33:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:40,675 INFO L93 Difference]: Finished difference Result 636 states and 797 transitions. [2023-04-01 00:33:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:33:40,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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 81 [2023-04-01 00:33:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:40,677 INFO L225 Difference]: With dead ends: 636 [2023-04-01 00:33:40,677 INFO L226 Difference]: Without dead ends: 350 [2023-04-01 00:33:40,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:33:40,678 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 78 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:40,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 169 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:33:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-04-01 00:33:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 348. [2023-04-01 00:33:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.2412790697674418) internal successors, (427), 344 states have internal predecessors, (427), 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) [2023-04-01 00:33:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 430 transitions. [2023-04-01 00:33:40,907 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 430 transitions. Word has length 81 [2023-04-01 00:33:40,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:40,907 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 430 transitions. [2023-04-01 00:33:40,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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) [2023-04-01 00:33:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 430 transitions. [2023-04-01 00:33:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 00:33:40,908 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:40,908 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] [2023-04-01 00:33:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 00:33:40,908 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:40,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash 389807204, now seen corresponding path program 1 times [2023-04-01 00:33:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263168049] [2023-04-01 00:33:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:40,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:40,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263168049] [2023-04-01 00:33:40,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263168049] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:40,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:40,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:33:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572435813] [2023-04-01 00:33:40,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:40,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:33:40,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:33:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:33:40,959 INFO L87 Difference]: Start difference. First operand 348 states and 430 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-04-01 00:33:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:41,277 INFO L93 Difference]: Finished difference Result 752 states and 943 transitions. [2023-04-01 00:33:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:33:41,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 81 [2023-04-01 00:33:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:41,279 INFO L225 Difference]: With dead ends: 752 [2023-04-01 00:33:41,279 INFO L226 Difference]: Without dead ends: 466 [2023-04-01 00:33:41,279 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 [2023-04-01 00:33:41,280 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 54 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:41,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 150 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:33:41,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-04-01 00:33:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2023-04-01 00:33:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 460 states have (on average 1.2391304347826086) internal successors, (570), 460 states have internal predecessors, (570), 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) [2023-04-01 00:33:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 573 transitions. [2023-04-01 00:33:41,598 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 573 transitions. Word has length 81 [2023-04-01 00:33:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:41,598 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 573 transitions. [2023-04-01 00:33:41,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-04-01 00:33:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 573 transitions. [2023-04-01 00:33:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 00:33:41,599 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:41,599 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] [2023-04-01 00:33:41,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-01 00:33:41,599 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:41,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 597067301, now seen corresponding path program 1 times [2023-04-01 00:33:41,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:41,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296214281] [2023-04-01 00:33:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:41,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:41,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:41,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296214281] [2023-04-01 00:33:41,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296214281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:41,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:41,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 00:33:41,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374154575] [2023-04-01 00:33:41,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:41,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 00:33:41,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:41,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 00:33:41,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:33:41,729 INFO L87 Difference]: Start difference. First operand 464 states and 573 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2023-04-01 00:33:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:42,411 INFO L93 Difference]: Finished difference Result 719 states and 882 transitions. [2023-04-01 00:33:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 00:33:42,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 82 [2023-04-01 00:33:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:42,414 INFO L225 Difference]: With dead ends: 719 [2023-04-01 00:33:42,414 INFO L226 Difference]: Without dead ends: 717 [2023-04-01 00:33:42,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:33:42,414 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 131 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:42,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 503 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:33:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-04-01 00:33:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 488. [2023-04-01 00:33:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 484 states have (on average 1.2107438016528926) internal successors, (586), 484 states have internal predecessors, (586), 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) [2023-04-01 00:33:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 589 transitions. [2023-04-01 00:33:42,760 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 589 transitions. Word has length 82 [2023-04-01 00:33:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:42,760 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 589 transitions. [2023-04-01 00:33:42,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2023-04-01 00:33:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 589 transitions. [2023-04-01 00:33:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 00:33:42,761 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:42,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:42,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-01 00:33:42,761 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:42,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2052835003, now seen corresponding path program 1 times [2023-04-01 00:33:42,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:42,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444017394] [2023-04-01 00:33:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:42,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 00:33:43,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:43,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444017394] [2023-04-01 00:33:43,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444017394] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:43,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:43,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:33:43,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332928912] [2023-04-01 00:33:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:43,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:33:43,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:43,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:33:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:33:43,051 INFO L87 Difference]: Start difference. First operand 488 states and 589 transitions. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 10 states have internal predecessors, (85), 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) [2023-04-01 00:33:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:45,089 INFO L93 Difference]: Finished difference Result 2093 states and 2544 transitions. [2023-04-01 00:33:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 00:33:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 10 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2023-04-01 00:33:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:45,093 INFO L225 Difference]: With dead ends: 2093 [2023-04-01 00:33:45,093 INFO L226 Difference]: Without dead ends: 1661 [2023-04-01 00:33:45,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2023-04-01 00:33:45,095 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1066 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:45,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1066 Valid, 581 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:33:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2023-04-01 00:33:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 492. [2023-04-01 00:33:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 488 states have (on average 1.209016393442623) internal successors, (590), 488 states have internal predecessors, (590), 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) [2023-04-01 00:33:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 593 transitions. [2023-04-01 00:33:45,472 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 593 transitions. Word has length 95 [2023-04-01 00:33:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:45,472 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 593 transitions. [2023-04-01 00:33:45,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 10 states have internal predecessors, (85), 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) [2023-04-01 00:33:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 593 transitions. [2023-04-01 00:33:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 00:33:45,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:45,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:45,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-01 00:33:45,473 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:45,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -774191083, now seen corresponding path program 1 times [2023-04-01 00:33:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:45,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725481258] [2023-04-01 00:33:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:45,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 00:33:45,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:45,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725481258] [2023-04-01 00:33:45,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725481258] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:45,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:45,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:33:45,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030868400] [2023-04-01 00:33:45,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:45,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:33:45,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:45,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:33:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:33:45,651 INFO L87 Difference]: Start difference. First operand 492 states and 593 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 8 states have internal predecessors, (86), 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) [2023-04-01 00:33:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:46,452 INFO L93 Difference]: Finished difference Result 1194 states and 1451 transitions. [2023-04-01 00:33:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:33:46,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2023-04-01 00:33:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:46,454 INFO L225 Difference]: With dead ends: 1194 [2023-04-01 00:33:46,455 INFO L226 Difference]: Without dead ends: 762 [2023-04-01 00:33:46,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:33:46,456 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 254 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:46,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 294 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:33:46,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2023-04-01 00:33:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 488. [2023-04-01 00:33:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 484 states have (on average 1.2086776859504131) internal successors, (585), 484 states have internal predecessors, (585), 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) [2023-04-01 00:33:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 588 transitions. [2023-04-01 00:33:46,833 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 588 transitions. Word has length 96 [2023-04-01 00:33:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:46,833 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 588 transitions. [2023-04-01 00:33:46,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 8 states have internal predecessors, (86), 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) [2023-04-01 00:33:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 588 transitions. [2023-04-01 00:33:46,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 00:33:46,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:46,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:46,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-01 00:33:46,834 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:46,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1658487734, now seen corresponding path program 1 times [2023-04-01 00:33:46,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:46,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863420320] [2023-04-01 00:33:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:46,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 00:33:47,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:47,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863420320] [2023-04-01 00:33:47,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863420320] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:33:47,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:33:47,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 00:33:47,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269434598] [2023-04-01 00:33:47,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:33:47,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 00:33:47,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:33:47,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 00:33:47,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-04-01 00:33:47,337 INFO L87 Difference]: Start difference. First operand 488 states and 588 transitions. Second operand has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 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) [2023-04-01 00:33:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:33:49,098 INFO L93 Difference]: Finished difference Result 1724 states and 2097 transitions. [2023-04-01 00:33:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 00:33:49,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 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 97 [2023-04-01 00:33:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:33:49,102 INFO L225 Difference]: With dead ends: 1724 [2023-04-01 00:33:49,102 INFO L226 Difference]: Without dead ends: 1291 [2023-04-01 00:33:49,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2023-04-01 00:33:49,103 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 586 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:33:49,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 1929 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:33:49,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2023-04-01 00:33:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 498. [2023-04-01 00:33:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 494 states have (on average 1.2064777327935223) internal successors, (596), 494 states have internal predecessors, (596), 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) [2023-04-01 00:33:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 599 transitions. [2023-04-01 00:33:49,556 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 599 transitions. Word has length 97 [2023-04-01 00:33:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:33:49,556 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 599 transitions. [2023-04-01 00:33:49,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 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) [2023-04-01 00:33:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 599 transitions. [2023-04-01 00:33:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 00:33:49,557 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:33:49,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:33:49,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-01 00:33:49,558 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-04-01 00:33:49,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:33:49,558 INFO L85 PathProgramCache]: Analyzing trace with hash 702127871, now seen corresponding path program 1 times [2023-04-01 00:33:49,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:33:49,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603237408] [2023-04-01 00:33:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:49,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:33:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:51,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:33:51,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603237408] [2023-04-01 00:33:51,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603237408] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:33:51,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427619694] [2023-04-01 00:33:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:33:51,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:33:51,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:33:51,443 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) [2023-04-01 00:33:51,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 00:33:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:33:51,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 00:33:51,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:33:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:33:55,898 INFO L327 TraceCheckSpWp]: Computing backward predicates...