/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:32:19,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:32:19,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:32:19,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:32:19,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:32:19,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:32:19,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:32:19,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:32:19,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:32:19,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:32:19,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:32:19,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:32:19,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:32:19,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:32:19,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:32:19,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:32:19,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:32:19,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:32:19,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:32:19,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:32:19,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:32:19,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:32:19,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:32:19,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:32:19,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:32:19,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:32:19,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:32:19,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:32:19,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:32:19,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:32:19,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:32:19,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:32:19,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:32:19,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:32:19,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:32:19,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:32:19,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:32:19,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:32:19,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:32:19,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:32:19,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:32:19,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:32:19,800 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:32:19,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:32:19,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:32:19,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:32:19,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:32:19,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:32:19,801 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:32:19,801 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:32:19,802 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:32:19,802 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:32:19,802 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:32:19,802 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:32:19,802 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:32:19,802 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:32:19,802 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:32:19,802 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:32:19,802 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:32:19,803 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:32:19,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:32:19,803 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:32:19,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:32:19,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:32:19,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:32:19,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:32:19,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:32:19,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:32:19,804 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:32:19,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:32:19,804 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:32:19,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:32:19,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:32:19,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:32:19,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:32:19,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:32:19,805 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:32:19,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:32:19,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:32:19,805 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:32:19,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:32:19,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:32:19,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:32:19,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:32:20,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:32:20,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:32:20,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:32:20,035 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:32:20,036 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:32:20,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-03 02:32:21,133 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:32:21,462 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:32:21,463 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-03 02:32:21,479 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5572b0154/4bfa27d104dd4f0f938d8922449aca04/FLAG31353ce2e [2023-04-03 02:32:21,492 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5572b0154/4bfa27d104dd4f0f938d8922449aca04 [2023-04-03 02:32:21,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:32:21,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:32:21,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:32:21,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:32:21,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:32:21,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:32:21" (1/1) ... [2023-04-03 02:32:21,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba814e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:21, skipping insertion in model container [2023-04-03 02:32:21,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:32:21" (1/1) ... [2023-04-03 02:32:21,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:32:21,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:32:21,787 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-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8622,8635] [2023-04-03 02:32:21,836 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-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15089,15102] [2023-04-03 02:32:21,854 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-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[17286,17299] [2023-04-03 02:32:21,860 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-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[18310,18323] [2023-04-03 02:32:22,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:32:22,072 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:32:22,139 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-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8622,8635] [2023-04-03 02:32:22,174 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-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15089,15102] [2023-04-03 02:32:22,233 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-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[17286,17299] [2023-04-03 02:32:22,242 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-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[18310,18323] [2023-04-03 02:32:22,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:32:22,347 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:32:22,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22 WrapperNode [2023-04-03 02:32:22,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:32:22,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:32:22,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:32:22,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:32:22,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22" (1/1) ... [2023-04-03 02:32:22,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22" (1/1) ... [2023-04-03 02:32:22,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22" (1/1) ... [2023-04-03 02:32:22,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22" (1/1) ... [2023-04-03 02:32:22,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22" (1/1) ... [2023-04-03 02:32:22,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22" (1/1) ... [2023-04-03 02:32:22,451 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22" (1/1) ... [2023-04-03 02:32:22,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22" (1/1) ... [2023-04-03 02:32:22,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:32:22,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:32:22,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:32:22,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:32:22,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22" (1/1) ... [2023-04-03 02:32:22,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:32:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:32:22,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:32:22,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:32:22,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:32:22,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:32:22,546 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:32:22,546 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:32:22,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:32:22,546 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:32:22,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:32:22,546 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:32:22,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:32:22,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:32:22,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:32:22,547 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:32:22,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:32:22,547 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:32:22,547 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:32:22,547 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:32:22,547 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:32:22,547 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:32:22,548 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:32:22,548 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:32:22,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:32:22,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:32:22,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:32:22,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:32:22,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:32:22,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:32:22,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:32:22,797 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:32:22,799 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:32:23,986 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:32:24,093 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:32:24,095 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:32:24,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:32:24 BoogieIcfgContainer [2023-04-03 02:32:24,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:32:24,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:32:24,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:32:24,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:32:24,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:32:21" (1/3) ... [2023-04-03 02:32:24,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38222c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:32:24, skipping insertion in model container [2023-04-03 02:32:24,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:22" (2/3) ... [2023-04-03 02:32:24,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38222c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:32:24, skipping insertion in model container [2023-04-03 02:32:24,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:32:24" (3/3) ... [2023-04-03 02:32:24,107 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-03 02:32:24,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:32:24,122 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-04-03 02:32:24,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:32:24,192 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;@69fe6821, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:32:24,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-04-03 02:32:24,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 422 states, 413 states have (on average 1.8619854721549636) internal successors, (769), 417 states have internal predecessors, (769), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:32:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:32:24,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:24,213 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] [2023-04-03 02:32:24,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:24,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:24,218 INFO L85 PathProgramCache]: Analyzing trace with hash -398298595, now seen corresponding path program 1 times [2023-04-03 02:32:24,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:24,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054197156] [2023-04-03 02:32:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:24,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:24,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054197156] [2023-04-03 02:32:24,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054197156] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:24,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:24,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:24,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411414163] [2023-04-03 02:32:24,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:24,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:24,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:24,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:24,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:24,762 INFO L87 Difference]: Start difference. First operand has 422 states, 413 states have (on average 1.8619854721549636) internal successors, (769), 417 states have internal predecessors, (769), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:24,949 INFO L93 Difference]: Finished difference Result 626 states and 1096 transitions. [2023-04-03 02:32:24,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:24,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 53 [2023-04-03 02:32:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:24,967 INFO L225 Difference]: With dead ends: 626 [2023-04-03 02:32:24,968 INFO L226 Difference]: Without dead ends: 503 [2023-04-03 02:32:24,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:24,978 INFO L413 NwaCegarLoop]: 780 mSDtfsCounter, 387 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:24,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1263 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-04-03 02:32:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 497. [2023-04-03 02:32:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 490 states have (on average 1.2938775510204081) internal successors, (634), 493 states have internal predecessors, (634), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 637 transitions. [2023-04-03 02:32:25,066 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 637 transitions. Word has length 53 [2023-04-03 02:32:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:25,066 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 637 transitions. [2023-04-03 02:32:25,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 637 transitions. [2023-04-03 02:32:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:32:25,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:25,070 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] [2023-04-03 02:32:25,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:32:25,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:25,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:25,071 INFO L85 PathProgramCache]: Analyzing trace with hash 469670672, now seen corresponding path program 1 times [2023-04-03 02:32:25,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:25,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519909505] [2023-04-03 02:32:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:25,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:25,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:25,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519909505] [2023-04-03 02:32:25,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519909505] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:25,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:25,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:25,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037348411] [2023-04-03 02:32:25,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:25,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:25,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:25,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:25,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:25,269 INFO L87 Difference]: Start difference. First operand 497 states and 637 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:25,382 INFO L93 Difference]: Finished difference Result 828 states and 1093 transitions. [2023-04-03 02:32:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 53 [2023-04-03 02:32:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:25,388 INFO L225 Difference]: With dead ends: 828 [2023-04-03 02:32:25,388 INFO L226 Difference]: Without dead ends: 633 [2023-04-03 02:32:25,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:25,393 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 206 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:25,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 927 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:25,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2023-04-03 02:32:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 627. [2023-04-03 02:32:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 620 states have (on average 1.3080645161290323) internal successors, (811), 623 states have internal predecessors, (811), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 814 transitions. [2023-04-03 02:32:25,437 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 814 transitions. Word has length 53 [2023-04-03 02:32:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:25,438 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 814 transitions. [2023-04-03 02:32:25,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 814 transitions. [2023-04-03 02:32:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:32:25,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:25,442 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] [2023-04-03 02:32:25,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:32:25,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:25,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:25,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1280199513, now seen corresponding path program 1 times [2023-04-03 02:32:25,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:25,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012695758] [2023-04-03 02:32:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:25,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:25,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:25,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012695758] [2023-04-03 02:32:25,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012695758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:25,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:25,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919235472] [2023-04-03 02:32:25,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:25,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:25,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:25,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:25,591 INFO L87 Difference]: Start difference. First operand 627 states and 814 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:25,710 INFO L93 Difference]: Finished difference Result 1123 states and 1481 transitions. [2023-04-03 02:32:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 53 [2023-04-03 02:32:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:25,717 INFO L225 Difference]: With dead ends: 1123 [2023-04-03 02:32:25,717 INFO L226 Difference]: Without dead ends: 878 [2023-04-03 02:32:25,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:25,722 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 258 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:25,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 944 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2023-04-03 02:32:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 871. [2023-04-03 02:32:25,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 864 states have (on average 1.3113425925925926) internal successors, (1133), 867 states have internal predecessors, (1133), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1136 transitions. [2023-04-03 02:32:25,779 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1136 transitions. Word has length 53 [2023-04-03 02:32:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:25,781 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 1136 transitions. [2023-04-03 02:32:25,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1136 transitions. [2023-04-03 02:32:25,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:32:25,783 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:25,784 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] [2023-04-03 02:32:25,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:32:25,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:25,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:25,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1174158582, now seen corresponding path program 1 times [2023-04-03 02:32:25,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:25,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058226667] [2023-04-03 02:32:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:25,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:25,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:25,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058226667] [2023-04-03 02:32:25,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058226667] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:25,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:25,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:32:25,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504295622] [2023-04-03 02:32:25,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:25,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:32:25,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:25,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:32:25,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:32:25,991 INFO L87 Difference]: Start difference. First operand 871 states and 1136 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 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) [2023-04-03 02:32:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:26,376 INFO L93 Difference]: Finished difference Result 1830 states and 2425 transitions. [2023-04-03 02:32:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:32:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 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 [2023-04-03 02:32:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:26,381 INFO L225 Difference]: With dead ends: 1830 [2023-04-03 02:32:26,381 INFO L226 Difference]: Without dead ends: 1128 [2023-04-03 02:32:26,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:32:26,389 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 1458 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:26,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1458 Valid, 357 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:32:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-04-03 02:32:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1122. [2023-04-03 02:32:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1115 states have (on average 1.3228699551569507) internal successors, (1475), 1118 states have internal predecessors, (1475), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1478 transitions. [2023-04-03 02:32:26,499 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1478 transitions. Word has length 53 [2023-04-03 02:32:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:26,500 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1478 transitions. [2023-04-03 02:32:26,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 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) [2023-04-03 02:32:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1478 transitions. [2023-04-03 02:32:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:32:26,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:26,503 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] [2023-04-03 02:32:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:32:26,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:26,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1840189742, now seen corresponding path program 1 times [2023-04-03 02:32:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289588437] [2023-04-03 02:32:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:26,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289588437] [2023-04-03 02:32:26,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289588437] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:26,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:26,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:32:26,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594071789] [2023-04-03 02:32:26,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:26,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:32:26,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:26,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:32:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:32:26,713 INFO L87 Difference]: Start difference. First operand 1122 states and 1478 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:27,229 INFO L93 Difference]: Finished difference Result 2579 states and 3436 transitions. [2023-04-03 02:32:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:32:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 54 [2023-04-03 02:32:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:27,237 INFO L225 Difference]: With dead ends: 2579 [2023-04-03 02:32:27,237 INFO L226 Difference]: Without dead ends: 1626 [2023-04-03 02:32:27,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:32:27,240 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 1303 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:27,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1303 Valid, 305 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:32:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2023-04-03 02:32:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1619. [2023-04-03 02:32:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1612 states have (on average 1.3207196029776676) internal successors, (2129), 1615 states have internal predecessors, (2129), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 2132 transitions. [2023-04-03 02:32:27,450 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 2132 transitions. Word has length 54 [2023-04-03 02:32:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:27,452 INFO L495 AbstractCegarLoop]: Abstraction has 1619 states and 2132 transitions. [2023-04-03 02:32:27,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 2132 transitions. [2023-04-03 02:32:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:32:27,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:27,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:27,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:32:27,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:27,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:27,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2031416162, now seen corresponding path program 1 times [2023-04-03 02:32:27,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:27,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342648397] [2023-04-03 02:32:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:27,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:27,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:27,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342648397] [2023-04-03 02:32:27,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342648397] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:27,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:27,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:32:27,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978639752] [2023-04-03 02:32:27,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:27,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:32:27,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:32:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:32:27,663 INFO L87 Difference]: Start difference. First operand 1619 states and 2132 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:28,801 INFO L93 Difference]: Finished difference Result 5963 states and 8075 transitions. [2023-04-03 02:32:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:32:28,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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 55 [2023-04-03 02:32:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:28,825 INFO L225 Difference]: With dead ends: 5963 [2023-04-03 02:32:28,826 INFO L226 Difference]: Without dead ends: 5490 [2023-04-03 02:32:28,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:32:28,831 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 2667 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2667 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:28,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2667 Valid, 663 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:32:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2023-04-03 02:32:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 1631. [2023-04-03 02:32:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1624 states have (on average 1.3208128078817734) internal successors, (2145), 1627 states have internal predecessors, (2145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2148 transitions. [2023-04-03 02:32:29,090 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2148 transitions. Word has length 55 [2023-04-03 02:32:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:29,091 INFO L495 AbstractCegarLoop]: Abstraction has 1631 states and 2148 transitions. [2023-04-03 02:32:29,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2148 transitions. [2023-04-03 02:32:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:32:29,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:29,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:29,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:32:29,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:29,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash 985591914, now seen corresponding path program 1 times [2023-04-03 02:32:29,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:29,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529480726] [2023-04-03 02:32:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:29,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:29,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:29,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529480726] [2023-04-03 02:32:29,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529480726] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:29,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:29,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:32:29,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844414423] [2023-04-03 02:32:29,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:29,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:32:29,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:32:29,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:32:29,208 INFO L87 Difference]: Start difference. First operand 1631 states and 2148 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:29,802 INFO L93 Difference]: Finished difference Result 4058 states and 5422 transitions. [2023-04-03 02:32:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:32:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 55 [2023-04-03 02:32:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:29,811 INFO L225 Difference]: With dead ends: 4058 [2023-04-03 02:32:29,811 INFO L226 Difference]: Without dead ends: 2605 [2023-04-03 02:32:29,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:32:29,815 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1092 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:29,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1092 Valid, 304 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:32:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2023-04-03 02:32:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2045. [2023-04-03 02:32:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2038 states have (on average 1.3331697742885182) internal successors, (2717), 2041 states have internal predecessors, (2717), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 2720 transitions. [2023-04-03 02:32:30,108 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 2720 transitions. Word has length 55 [2023-04-03 02:32:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:30,108 INFO L495 AbstractCegarLoop]: Abstraction has 2045 states and 2720 transitions. [2023-04-03 02:32:30,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 2720 transitions. [2023-04-03 02:32:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:32:30,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:30,110 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] [2023-04-03 02:32:30,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:32:30,110 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:30,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:30,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1581915595, now seen corresponding path program 1 times [2023-04-03 02:32:30,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:30,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465552476] [2023-04-03 02:32:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:30,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:30,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:30,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465552476] [2023-04-03 02:32:30,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465552476] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:30,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:30,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:32:30,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141362191] [2023-04-03 02:32:30,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:30,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:32:30,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:32:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:32:30,298 INFO L87 Difference]: Start difference. First operand 2045 states and 2720 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2023-04-03 02:32:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:32,166 INFO L93 Difference]: Finished difference Result 8014 states and 10889 transitions. [2023-04-03 02:32:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:32:32,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 [2023-04-03 02:32:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:32,195 INFO L225 Difference]: With dead ends: 8014 [2023-04-03 02:32:32,195 INFO L226 Difference]: Without dead ends: 7296 [2023-04-03 02:32:32,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:32:32,200 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 1669 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:32,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1669 Valid, 584 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:32:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7296 states. [2023-04-03 02:32:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7296 to 2067. [2023-04-03 02:32:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2060 states have (on average 1.3339805825242719) internal successors, (2748), 2063 states have internal predecessors, (2748), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 2751 transitions. [2023-04-03 02:32:32,581 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 2751 transitions. Word has length 56 [2023-04-03 02:32:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:32,582 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 2751 transitions. [2023-04-03 02:32:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2023-04-03 02:32:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 2751 transitions. [2023-04-03 02:32:32,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:32:32,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:32,584 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] [2023-04-03 02:32:32,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:32:32,584 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:32,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash 417806336, now seen corresponding path program 1 times [2023-04-03 02:32:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:32,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584130737] [2023-04-03 02:32:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:32,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:32,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584130737] [2023-04-03 02:32:32,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584130737] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:32,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:32,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:32:32,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382746521] [2023-04-03 02:32:32,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:32,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:32:32,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:32,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:32:32,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:32:32,751 INFO L87 Difference]: Start difference. First operand 2067 states and 2751 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2023-04-03 02:32:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:34,301 INFO L93 Difference]: Finished difference Result 7319 states and 9835 transitions. [2023-04-03 02:32:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:32:34,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 [2023-04-03 02:32:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:34,327 INFO L225 Difference]: With dead ends: 7319 [2023-04-03 02:32:34,328 INFO L226 Difference]: Without dead ends: 6450 [2023-04-03 02:32:34,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:32:34,332 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 2121 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2121 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:34,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2121 Valid, 515 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:32:34,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6450 states. [2023-04-03 02:32:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6450 to 2081. [2023-04-03 02:32:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2074 states have (on average 1.3336547733847637) internal successors, (2766), 2077 states have internal predecessors, (2766), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 2769 transitions. [2023-04-03 02:32:34,763 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 2769 transitions. Word has length 56 [2023-04-03 02:32:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:34,764 INFO L495 AbstractCegarLoop]: Abstraction has 2081 states and 2769 transitions. [2023-04-03 02:32:34,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2023-04-03 02:32:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 2769 transitions. [2023-04-03 02:32:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:32:34,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:34,766 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] [2023-04-03 02:32:34,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:32:34,766 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:34,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1599035685, now seen corresponding path program 1 times [2023-04-03 02:32:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:34,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534055487] [2023-04-03 02:32:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:34,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:35,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:35,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534055487] [2023-04-03 02:32:35,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534055487] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:35,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:35,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:32:35,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77309536] [2023-04-03 02:32:35,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:35,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:32:35,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:35,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:32:35,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:32:35,053 INFO L87 Difference]: Start difference. First operand 2081 states and 2769 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:36,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:36,195 INFO L93 Difference]: Finished difference Result 5326 states and 7131 transitions. [2023-04-03 02:32:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:32:36,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 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 57 [2023-04-03 02:32:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:36,205 INFO L225 Difference]: With dead ends: 5326 [2023-04-03 02:32:36,205 INFO L226 Difference]: Without dead ends: 3746 [2023-04-03 02:32:36,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:32:36,210 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1387 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:36,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1387 Valid, 696 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:32:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2023-04-03 02:32:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 2081. [2023-04-03 02:32:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2074 states have (on average 1.3312439729990357) internal successors, (2761), 2077 states have internal predecessors, (2761), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 2764 transitions. [2023-04-03 02:32:36,743 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 2764 transitions. Word has length 57 [2023-04-03 02:32:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:36,744 INFO L495 AbstractCegarLoop]: Abstraction has 2081 states and 2764 transitions. [2023-04-03 02:32:36,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 2764 transitions. [2023-04-03 02:32:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:32:36,746 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:36,746 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] [2023-04-03 02:32:36,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:32:36,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:36,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1827962344, now seen corresponding path program 1 times [2023-04-03 02:32:36,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:36,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368790471] [2023-04-03 02:32:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:36,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:37,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368790471] [2023-04-03 02:32:37,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368790471] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:37,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:37,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:32:37,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286110370] [2023-04-03 02:32:37,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:37,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:32:37,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:37,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:32:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:32:37,112 INFO L87 Difference]: Start difference. First operand 2081 states and 2764 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:39,557 INFO L93 Difference]: Finished difference Result 8404 states and 11349 transitions. [2023-04-03 02:32:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:32:39,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 57 [2023-04-03 02:32:39,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:39,571 INFO L225 Difference]: With dead ends: 8404 [2023-04-03 02:32:39,571 INFO L226 Difference]: Without dead ends: 6940 [2023-04-03 02:32:39,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:32:39,577 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1332 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:39,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1332 Valid, 1453 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:32:39,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6940 states. [2023-04-03 02:32:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6940 to 2052. [2023-04-03 02:32:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2045 states have (on average 1.3300733496332517) internal successors, (2720), 2048 states have internal predecessors, (2720), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 2723 transitions. [2023-04-03 02:32:40,208 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 2723 transitions. Word has length 57 [2023-04-03 02:32:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:40,208 INFO L495 AbstractCegarLoop]: Abstraction has 2052 states and 2723 transitions. [2023-04-03 02:32:40,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 2723 transitions. [2023-04-03 02:32:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:32:40,210 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:40,210 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] [2023-04-03 02:32:40,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:32:40,210 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:40,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1412944368, now seen corresponding path program 1 times [2023-04-03 02:32:40,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:40,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145625212] [2023-04-03 02:32:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:40,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:40,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:40,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145625212] [2023-04-03 02:32:40,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145625212] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:40,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:40,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:32:40,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133407948] [2023-04-03 02:32:40,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:40,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:32:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:40,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:32:40,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:32:40,529 INFO L87 Difference]: Start difference. First operand 2052 states and 2723 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:43,075 INFO L93 Difference]: Finished difference Result 6801 states and 9150 transitions. [2023-04-03 02:32:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:32:43,075 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 57 [2023-04-03 02:32:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:43,088 INFO L225 Difference]: With dead ends: 6801 [2023-04-03 02:32:43,089 INFO L226 Difference]: Without dead ends: 6796 [2023-04-03 02:32:43,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:32:43,092 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 1291 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:43,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 1240 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:32:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6796 states. [2023-04-03 02:32:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6796 to 2052. [2023-04-03 02:32:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2045 states have (on average 1.3290953545232274) internal successors, (2718), 2048 states have internal predecessors, (2718), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 2721 transitions. [2023-04-03 02:32:43,714 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 2721 transitions. Word has length 57 [2023-04-03 02:32:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:43,715 INFO L495 AbstractCegarLoop]: Abstraction has 2052 states and 2721 transitions. [2023-04-03 02:32:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 2721 transitions. [2023-04-03 02:32:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:32:43,717 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:43,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:43,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:32:43,717 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:43,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:43,718 INFO L85 PathProgramCache]: Analyzing trace with hash 8164034, now seen corresponding path program 1 times [2023-04-03 02:32:43,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:43,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538620414] [2023-04-03 02:32:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:43,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:43,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:43,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538620414] [2023-04-03 02:32:43,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538620414] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:43,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:43,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:43,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157743892] [2023-04-03 02:32:43,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:43,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:43,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:43,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:43,798 INFO L87 Difference]: Start difference. First operand 2052 states and 2721 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:44,486 INFO L93 Difference]: Finished difference Result 2866 states and 3814 transitions. [2023-04-03 02:32:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:44,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-03 02:32:44,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:44,495 INFO L225 Difference]: With dead ends: 2866 [2023-04-03 02:32:44,495 INFO L226 Difference]: Without dead ends: 2058 [2023-04-03 02:32:44,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:44,499 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 183 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:44,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 639 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:44,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2023-04-03 02:32:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 2052. [2023-04-03 02:32:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2045 states have (on average 1.3134474327628363) internal successors, (2686), 2048 states have internal predecessors, (2686), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 2689 transitions. [2023-04-03 02:32:45,117 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 2689 transitions. Word has length 58 [2023-04-03 02:32:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:45,117 INFO L495 AbstractCegarLoop]: Abstraction has 2052 states and 2689 transitions. [2023-04-03 02:32:45,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:45,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 2689 transitions. [2023-04-03 02:32:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:32:45,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:45,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:45,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:32:45,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:45,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:45,120 INFO L85 PathProgramCache]: Analyzing trace with hash -101592662, now seen corresponding path program 1 times [2023-04-03 02:32:45,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:45,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721712636] [2023-04-03 02:32:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:45,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:45,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:45,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721712636] [2023-04-03 02:32:45,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721712636] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:45,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:45,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:45,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461688506] [2023-04-03 02:32:45,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:45,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:45,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:45,190 INFO L87 Difference]: Start difference. First operand 2052 states and 2689 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:45,909 INFO L93 Difference]: Finished difference Result 2833 states and 3722 transitions. [2023-04-03 02:32:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:45,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-03 02:32:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:45,914 INFO L225 Difference]: With dead ends: 2833 [2023-04-03 02:32:45,914 INFO L226 Difference]: Without dead ends: 2059 [2023-04-03 02:32:45,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:45,916 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 167 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:45,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 632 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2023-04-03 02:32:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 2052. [2023-04-03 02:32:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2045 states have (on average 1.2958435207823962) internal successors, (2650), 2048 states have internal predecessors, (2650), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 2653 transitions. [2023-04-03 02:32:46,394 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 2653 transitions. Word has length 58 [2023-04-03 02:32:46,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:46,395 INFO L495 AbstractCegarLoop]: Abstraction has 2052 states and 2653 transitions. [2023-04-03 02:32:46,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 2653 transitions. [2023-04-03 02:32:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:32:46,397 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:46,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:46,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:32:46,397 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:46,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash -269494430, now seen corresponding path program 1 times [2023-04-03 02:32:46,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:46,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286767513] [2023-04-03 02:32:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:46,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:46,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:46,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286767513] [2023-04-03 02:32:46,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286767513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:46,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:46,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:46,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422287395] [2023-04-03 02:32:46,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:46,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:46,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:46,464 INFO L87 Difference]: Start difference. First operand 2052 states and 2653 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:47,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:47,214 INFO L93 Difference]: Finished difference Result 2602 states and 3351 transitions. [2023-04-03 02:32:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:47,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-03 02:32:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:47,219 INFO L225 Difference]: With dead ends: 2602 [2023-04-03 02:32:47,219 INFO L226 Difference]: Without dead ends: 2021 [2023-04-03 02:32:47,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:47,223 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 219 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:47,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 572 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2023-04-03 02:32:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 2019. [2023-04-03 02:32:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2012 states have (on average 1.271868787276342) internal successors, (2559), 2015 states have internal predecessors, (2559), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 2562 transitions. [2023-04-03 02:32:47,925 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 2562 transitions. Word has length 58 [2023-04-03 02:32:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:47,926 INFO L495 AbstractCegarLoop]: Abstraction has 2019 states and 2562 transitions. [2023-04-03 02:32:47,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 2562 transitions. [2023-04-03 02:32:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:32:47,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:47,928 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] [2023-04-03 02:32:47,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:32:47,929 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:47,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:47,929 INFO L85 PathProgramCache]: Analyzing trace with hash -944781953, now seen corresponding path program 1 times [2023-04-03 02:32:47,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:47,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817840846] [2023-04-03 02:32:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:47,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:48,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:48,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817840846] [2023-04-03 02:32:48,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817840846] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:48,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:48,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:48,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514209079] [2023-04-03 02:32:48,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:48,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:48,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:48,018 INFO L87 Difference]: Start difference. First operand 2019 states and 2562 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:48,707 INFO L93 Difference]: Finished difference Result 3241 states and 4122 transitions. [2023-04-03 02:32:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 60 [2023-04-03 02:32:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:48,713 INFO L225 Difference]: With dead ends: 3241 [2023-04-03 02:32:48,713 INFO L226 Difference]: Without dead ends: 2235 [2023-04-03 02:32:48,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:48,716 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 246 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:48,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 407 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:48,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2023-04-03 02:32:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1915. [2023-04-03 02:32:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1908 states have (on average 1.2683438155136268) internal successors, (2420), 1911 states have internal predecessors, (2420), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2423 transitions. [2023-04-03 02:32:49,260 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2423 transitions. Word has length 60 [2023-04-03 02:32:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:49,260 INFO L495 AbstractCegarLoop]: Abstraction has 1915 states and 2423 transitions. [2023-04-03 02:32:49,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2423 transitions. [2023-04-03 02:32:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:32:49,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:49,263 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] [2023-04-03 02:32:49,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:32:49,263 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:49,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:49,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1040431367, now seen corresponding path program 1 times [2023-04-03 02:32:49,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:49,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267780073] [2023-04-03 02:32:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:49,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:49,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:49,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267780073] [2023-04-03 02:32:49,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267780073] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:49,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:49,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:49,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204827145] [2023-04-03 02:32:49,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:49,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:49,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:49,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:49,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:49,329 INFO L87 Difference]: Start difference. First operand 1915 states and 2423 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:50,052 INFO L93 Difference]: Finished difference Result 3158 states and 3998 transitions. [2023-04-03 02:32:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:50,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 60 [2023-04-03 02:32:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:50,058 INFO L225 Difference]: With dead ends: 3158 [2023-04-03 02:32:50,058 INFO L226 Difference]: Without dead ends: 2206 [2023-04-03 02:32:50,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:50,062 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 210 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:50,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 319 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2023-04-03 02:32:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 1793. [2023-04-03 02:32:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1786 states have (on average 1.265397536394177) internal successors, (2260), 1789 states have internal predecessors, (2260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 2263 transitions. [2023-04-03 02:32:50,606 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 2263 transitions. Word has length 60 [2023-04-03 02:32:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:50,606 INFO L495 AbstractCegarLoop]: Abstraction has 1793 states and 2263 transitions. [2023-04-03 02:32:50,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 2263 transitions. [2023-04-03 02:32:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:32:50,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:50,608 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] [2023-04-03 02:32:50,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:32:50,608 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:50,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:50,609 INFO L85 PathProgramCache]: Analyzing trace with hash -404418710, now seen corresponding path program 1 times [2023-04-03 02:32:50,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:50,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788408227] [2023-04-03 02:32:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:50,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:51,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:51,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788408227] [2023-04-03 02:32:51,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788408227] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:51,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:51,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:32:51,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594730214] [2023-04-03 02:32:51,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:51,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:32:51,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:51,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:32:51,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:32:51,794 INFO L87 Difference]: Start difference. First operand 1793 states and 2263 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:54,648 INFO L93 Difference]: Finished difference Result 3286 states and 4137 transitions. [2023-04-03 02:32:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:32:54,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 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 60 [2023-04-03 02:32:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:54,654 INFO L225 Difference]: With dead ends: 3286 [2023-04-03 02:32:54,654 INFO L226 Difference]: Without dead ends: 3282 [2023-04-03 02:32:54,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2023-04-03 02:32:54,656 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 2058 mSDsluCounter, 3681 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2058 SdHoareTripleChecker+Valid, 4073 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:54,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2058 Valid, 4073 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1758 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:32:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2023-04-03 02:32:55,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1805. [2023-04-03 02:32:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1798 states have (on average 1.2664071190211346) internal successors, (2277), 1801 states have internal predecessors, (2277), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:55,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 2280 transitions. [2023-04-03 02:32:55,444 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 2280 transitions. Word has length 60 [2023-04-03 02:32:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:55,445 INFO L495 AbstractCegarLoop]: Abstraction has 1805 states and 2280 transitions. [2023-04-03 02:32:55,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:55,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 2280 transitions. [2023-04-03 02:32:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:32:55,446 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:55,446 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] [2023-04-03 02:32:55,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:32:55,447 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:55,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1510007574, now seen corresponding path program 1 times [2023-04-03 02:32:55,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:55,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479171750] [2023-04-03 02:32:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:55,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:55,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479171750] [2023-04-03 02:32:55,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479171750] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:55,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:55,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-03 02:32:55,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541770536] [2023-04-03 02:32:55,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:55,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-03 02:32:55,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:55,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-03 02:32:55,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-03 02:32:55,984 INFO L87 Difference]: Start difference. First operand 1805 states and 2280 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:57,736 INFO L93 Difference]: Finished difference Result 3758 states and 4765 transitions. [2023-04-03 02:32:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 02:32:57,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 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 60 [2023-04-03 02:32:57,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:57,741 INFO L225 Difference]: With dead ends: 3758 [2023-04-03 02:32:57,741 INFO L226 Difference]: Without dead ends: 3247 [2023-04-03 02:32:57,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:32:57,742 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1287 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:57,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1287 Valid, 1651 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:32:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2023-04-03 02:32:58,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 1758. [2023-04-03 02:32:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1753 states have (on average 1.2675413576725614) internal successors, (2222), 1754 states have internal predecessors, (2222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 2225 transitions. [2023-04-03 02:32:58,540 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 2225 transitions. Word has length 60 [2023-04-03 02:32:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:58,540 INFO L495 AbstractCegarLoop]: Abstraction has 1758 states and 2225 transitions. [2023-04-03 02:32:58,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 2225 transitions. [2023-04-03 02:32:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:32:58,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:58,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:58,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:32:58,542 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:58,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:58,542 INFO L85 PathProgramCache]: Analyzing trace with hash -307769864, now seen corresponding path program 1 times [2023-04-03 02:32:58,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:58,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213275271] [2023-04-03 02:32:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:58,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:58,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:58,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213275271] [2023-04-03 02:32:58,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213275271] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:58,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:58,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:32:58,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897337277] [2023-04-03 02:32:58,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:58,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:32:58,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:58,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:32:58,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:32:58,658 INFO L87 Difference]: Start difference. First operand 1758 states and 2225 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:59,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:59,529 INFO L93 Difference]: Finished difference Result 1764 states and 2228 transitions. [2023-04-03 02:32:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:32:59,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-03 02:32:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:59,532 INFO L225 Difference]: With dead ends: 1764 [2023-04-03 02:32:59,532 INFO L226 Difference]: Without dead ends: 1613 [2023-04-03 02:32:59,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:32:59,534 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 428 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:59,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 511 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2023-04-03 02:33:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1609. [2023-04-03 02:33:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1604 states have (on average 1.2693266832917707) internal successors, (2036), 1605 states have internal predecessors, (2036), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2039 transitions. [2023-04-03 02:33:00,176 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2039 transitions. Word has length 61 [2023-04-03 02:33:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:00,176 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 2039 transitions. [2023-04-03 02:33:00,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2039 transitions. [2023-04-03 02:33:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:33:00,178 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:00,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:33:00,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:33:00,178 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:00,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:00,179 INFO L85 PathProgramCache]: Analyzing trace with hash -364966000, now seen corresponding path program 1 times [2023-04-03 02:33:00,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:00,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977949268] [2023-04-03 02:33:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:00,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:00,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977949268] [2023-04-03 02:33:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977949268] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:00,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:00,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:33:00,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147430472] [2023-04-03 02:33:00,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:00,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:33:00,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:00,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:33:00,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:33:00,695 INFO L87 Difference]: Start difference. First operand 1609 states and 2039 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:02,599 INFO L93 Difference]: Finished difference Result 3501 states and 4456 transitions. [2023-04-03 02:33:02,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:33:02,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-03 02:33:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:02,603 INFO L225 Difference]: With dead ends: 3501 [2023-04-03 02:33:02,603 INFO L226 Difference]: Without dead ends: 2996 [2023-04-03 02:33:02,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:33:02,604 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 1024 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:02,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 2295 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:33:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2023-04-03 02:33:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 1572. [2023-04-03 02:33:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1568 states have (on average 1.2684948979591837) internal successors, (1989), 1568 states have internal predecessors, (1989), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 1992 transitions. [2023-04-03 02:33:03,224 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 1992 transitions. Word has length 61 [2023-04-03 02:33:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:03,224 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 1992 transitions. [2023-04-03 02:33:03,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 1992 transitions. [2023-04-03 02:33:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:33:03,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:03,226 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] [2023-04-03 02:33:03,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:33:03,226 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:03,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:03,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1601123319, now seen corresponding path program 1 times [2023-04-03 02:33:03,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:03,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092980417] [2023-04-03 02:33:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:03,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:03,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:03,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092980417] [2023-04-03 02:33:03,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092980417] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:03,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:03,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:33:03,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768478848] [2023-04-03 02:33:03,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:03,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:33:03,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:03,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:33:03,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:03,350 INFO L87 Difference]: Start difference. First operand 1572 states and 1992 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:04,354 INFO L93 Difference]: Finished difference Result 3005 states and 3879 transitions. [2023-04-03 02:33:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:33:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 62 [2023-04-03 02:33:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:04,359 INFO L225 Difference]: With dead ends: 3005 [2023-04-03 02:33:04,359 INFO L226 Difference]: Without dead ends: 2277 [2023-04-03 02:33:04,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:04,361 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 84 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:04,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 372 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:33:04,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2023-04-03 02:33:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2155. [2023-04-03 02:33:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2151 states have (on average 1.2673175267317527) internal successors, (2726), 2151 states have internal predecessors, (2726), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:05,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 2729 transitions. [2023-04-03 02:33:05,251 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 2729 transitions. Word has length 62 [2023-04-03 02:33:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:05,251 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 2729 transitions. [2023-04-03 02:33:05,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:05,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 2729 transitions. [2023-04-03 02:33:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:33:05,252 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:05,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:33:05,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:33:05,253 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:05,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:05,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1498545665, now seen corresponding path program 1 times [2023-04-03 02:33:05,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:05,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680434885] [2023-04-03 02:33:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:05,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:05,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:05,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680434885] [2023-04-03 02:33:05,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680434885] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:05,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:05,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:33:05,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334651397] [2023-04-03 02:33:05,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:05,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:33:05,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:05,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:33:05,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:05,369 INFO L87 Difference]: Start difference. First operand 2155 states and 2729 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:06,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:06,846 INFO L93 Difference]: Finished difference Result 4389 states and 5663 transitions. [2023-04-03 02:33:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:33:06,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-04-03 02:33:06,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:06,850 INFO L225 Difference]: With dead ends: 4389 [2023-04-03 02:33:06,851 INFO L226 Difference]: Without dead ends: 3137 [2023-04-03 02:33:06,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:06,853 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 74 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:06,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 362 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:33:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2023-04-03 02:33:08,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2843. [2023-04-03 02:33:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2843 states, 2839 states have (on average 1.263120817189151) internal successors, (3586), 2839 states have internal predecessors, (3586), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2843 states to 2843 states and 3589 transitions. [2023-04-03 02:33:08,094 INFO L78 Accepts]: Start accepts. Automaton has 2843 states and 3589 transitions. Word has length 64 [2023-04-03 02:33:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:08,094 INFO L495 AbstractCegarLoop]: Abstraction has 2843 states and 3589 transitions. [2023-04-03 02:33:08,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:08,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2843 states and 3589 transitions. [2023-04-03 02:33:08,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-03 02:33:08,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:08,096 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] [2023-04-03 02:33:08,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:33:08,097 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:08,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash 93577176, now seen corresponding path program 1 times [2023-04-03 02:33:08,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:08,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011396291] [2023-04-03 02:33:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:08,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:08,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:08,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011396291] [2023-04-03 02:33:08,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011396291] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:08,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:08,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:33:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353876931] [2023-04-03 02:33:08,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:08,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:33:08,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:33:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:08,209 INFO L87 Difference]: Start difference. First operand 2843 states and 3589 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:10,160 INFO L93 Difference]: Finished difference Result 5975 states and 7667 transitions. [2023-04-03 02:33:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:33:10,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 68 [2023-04-03 02:33:10,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:10,165 INFO L225 Difference]: With dead ends: 5975 [2023-04-03 02:33:10,165 INFO L226 Difference]: Without dead ends: 4243 [2023-04-03 02:33:10,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:10,168 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 61 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:10,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 349 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:33:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2023-04-03 02:33:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3825. [2023-04-03 02:33:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3821 states have (on average 1.254645380790369) internal successors, (4794), 3821 states have internal predecessors, (4794), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 4797 transitions. [2023-04-03 02:33:11,855 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 4797 transitions. Word has length 68 [2023-04-03 02:33:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:11,856 INFO L495 AbstractCegarLoop]: Abstraction has 3825 states and 4797 transitions. [2023-04-03 02:33:11,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 4797 transitions. [2023-04-03 02:33:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:33:11,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:11,857 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] [2023-04-03 02:33:11,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:33:11,858 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:11,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:11,858 INFO L85 PathProgramCache]: Analyzing trace with hash -94004140, now seen corresponding path program 1 times [2023-04-03 02:33:11,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:11,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513025340] [2023-04-03 02:33:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:11,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:12,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:12,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513025340] [2023-04-03 02:33:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513025340] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:12,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:33:12,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820923386] [2023-04-03 02:33:12,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:12,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:33:12,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:12,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:33:12,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:33:12,219 INFO L87 Difference]: Start difference. First operand 3825 states and 4797 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:15,569 INFO L93 Difference]: Finished difference Result 5925 states and 7412 transitions. [2023-04-03 02:33:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:33:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 72 [2023-04-03 02:33:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:15,578 INFO L225 Difference]: With dead ends: 5925 [2023-04-03 02:33:15,578 INFO L226 Difference]: Without dead ends: 5923 [2023-04-03 02:33:15,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:33:15,579 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 934 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:15,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 1394 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:33:15,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5923 states. [2023-04-03 02:33:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5923 to 4317. [2023-04-03 02:33:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4317 states, 4313 states have (on average 1.249478321354046) internal successors, (5389), 4313 states have internal predecessors, (5389), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 5392 transitions. [2023-04-03 02:33:17,630 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 5392 transitions. Word has length 72 [2023-04-03 02:33:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:17,630 INFO L495 AbstractCegarLoop]: Abstraction has 4317 states and 5392 transitions. [2023-04-03 02:33:17,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 5392 transitions. [2023-04-03 02:33:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:33:17,632 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:17,632 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] [2023-04-03 02:33:17,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-03 02:33:17,633 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:17,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1403765456, now seen corresponding path program 1 times [2023-04-03 02:33:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441280335] [2023-04-03 02:33:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:17,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:17,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441280335] [2023-04-03 02:33:17,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441280335] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:17,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:17,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:33:17,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287681122] [2023-04-03 02:33:17,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:17,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:33:17,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:17,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:33:17,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:33:17,767 INFO L87 Difference]: Start difference. First operand 4317 states and 5392 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:21,958 INFO L93 Difference]: Finished difference Result 8903 states and 11207 transitions. [2023-04-03 02:33:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:33:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 75 [2023-04-03 02:33:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:21,969 INFO L225 Difference]: With dead ends: 8903 [2023-04-03 02:33:21,970 INFO L226 Difference]: Without dead ends: 7727 [2023-04-03 02:33:21,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:33:21,972 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1336 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:21,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1336 Valid, 365 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:33:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2023-04-03 02:33:24,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 4237. [2023-04-03 02:33:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4233 states have (on average 1.2504134183794) internal successors, (5293), 4233 states have internal predecessors, (5293), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 5296 transitions. [2023-04-03 02:33:24,153 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 5296 transitions. Word has length 75 [2023-04-03 02:33:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:24,153 INFO L495 AbstractCegarLoop]: Abstraction has 4237 states and 5296 transitions. [2023-04-03 02:33:24,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 5296 transitions. [2023-04-03 02:33:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:33:24,155 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:24,155 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] [2023-04-03 02:33:24,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-03 02:33:24,155 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:24,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1556055522, now seen corresponding path program 1 times [2023-04-03 02:33:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:24,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470378995] [2023-04-03 02:33:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:24,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:24,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:24,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470378995] [2023-04-03 02:33:24,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470378995] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:24,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:24,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:33:24,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519944661] [2023-04-03 02:33:24,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:24,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:33:24,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:24,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:33:24,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:33:24,437 INFO L87 Difference]: Start difference. First operand 4237 states and 5296 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:27,049 INFO L93 Difference]: Finished difference Result 4889 states and 6083 transitions. [2023-04-03 02:33:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:33:27,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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 78 [2023-04-03 02:33:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:27,055 INFO L225 Difference]: With dead ends: 4889 [2023-04-03 02:33:27,055 INFO L226 Difference]: Without dead ends: 4887 [2023-04-03 02:33:27,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:33:27,056 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 281 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:27,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 1047 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:33:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4887 states. [2023-04-03 02:33:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4887 to 4173. [2023-04-03 02:33:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4169 states have (on average 1.2518589589829696) internal successors, (5219), 4169 states have internal predecessors, (5219), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 5222 transitions. [2023-04-03 02:33:29,100 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 5222 transitions. Word has length 78 [2023-04-03 02:33:29,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:29,100 INFO L495 AbstractCegarLoop]: Abstraction has 4173 states and 5222 transitions. [2023-04-03 02:33:29,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:29,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 5222 transitions. [2023-04-03 02:33:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-03 02:33:29,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:29,102 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:33:29,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-03 02:33:29,102 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:29,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1910657030, now seen corresponding path program 1 times [2023-04-03 02:33:29,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:29,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252899001] [2023-04-03 02:33:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:29,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 02:33:29,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252899001] [2023-04-03 02:33:29,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252899001] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:29,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:29,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:33:29,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651719633] [2023-04-03 02:33:29,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:29,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:33:29,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:33:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:33:29,382 INFO L87 Difference]: Start difference. First operand 4173 states and 5222 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:33,159 INFO L93 Difference]: Finished difference Result 8620 states and 10767 transitions. [2023-04-03 02:33:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:33:33,159 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 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 82 [2023-04-03 02:33:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:33,167 INFO L225 Difference]: With dead ends: 8620 [2023-04-03 02:33:33,167 INFO L226 Difference]: Without dead ends: 6618 [2023-04-03 02:33:33,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:33:33,170 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 669 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:33,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 616 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:33:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6618 states. [2023-04-03 02:33:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6618 to 4129. [2023-04-03 02:33:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4129 states, 4125 states have (on average 1.2528484848484849) internal successors, (5168), 4125 states have internal predecessors, (5168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4129 states to 4129 states and 5171 transitions. [2023-04-03 02:33:35,261 INFO L78 Accepts]: Start accepts. Automaton has 4129 states and 5171 transitions. Word has length 82 [2023-04-03 02:33:35,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:35,261 INFO L495 AbstractCegarLoop]: Abstraction has 4129 states and 5171 transitions. [2023-04-03 02:33:35,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4129 states and 5171 transitions. [2023-04-03 02:33:35,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 02:33:35,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:35,263 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:33:35,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-03 02:33:35,263 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:35,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:35,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1871341102, now seen corresponding path program 1 times [2023-04-03 02:33:35,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:35,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640756585] [2023-04-03 02:33:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:35,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:36,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:36,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640756585] [2023-04-03 02:33:36,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640756585] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:33:36,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179502284] [2023-04-03 02:33:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:36,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:33:36,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:33:36,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:33:36,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:33:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:36,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-03 02:33:36,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:33:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:37,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:33:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:42,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179502284] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:33:42,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731127806] [2023-04-03 02:33:42,764 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-03 02:33:42,764 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:33:42,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:33:42,770 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:33:42,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:33:44,995 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 360 for LOIs [2023-04-03 02:34:01,979 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6