/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.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:41:16,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:41:16,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:41:16,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:41:16,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:41:16,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:41:16,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:41:16,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:41:16,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:41:16,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:41:16,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:41:16,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:41:16,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:41:16,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:41:16,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:41:16,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:41:16,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:41:16,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:41:16,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:41:16,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:41:16,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:41:16,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:41:16,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:41:16,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:41:16,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:41:16,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:41:16,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:41:16,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:41:16,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:41:16,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:41:16,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:41:16,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:41:16,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:41:16,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:41:16,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:41:16,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:41:16,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:41:16,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:41:16,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:41:16,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:41:16,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:41:16,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:41:16,865 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:41:16,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:41:16,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:41:16,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:41:16,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:41:16,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:41:16,867 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:41:16,867 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:41:16,867 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:41:16,867 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:41:16,868 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:41:16,868 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:41:16,868 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:41:16,868 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:41:16,868 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:41:16,868 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:41:16,868 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:41:16,869 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:41:16,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:41:16,869 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:41:16,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:41:16,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:41:16,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:41:16,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:41:16,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:41:16,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:41:16,870 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:41:16,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:41:16,870 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:41:16,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:41:16,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:41:16,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:41:16,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:41:16,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:41:16,871 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:41:16,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:41:16,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:41:16,872 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:41:16,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:41:16,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:41:16,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:41:16,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:41:17,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:41:17,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:41:17,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:41:17,149 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:41:17,149 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:41:17,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-04-01 06:41:18,330 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:41:18,538 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:41:18,539 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-04-01 06:41:18,553 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c98f352b2/a4f192d8ea824153b8ce543ef8db507a/FLAG2ec92c5f3 [2023-04-01 06:41:18,563 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c98f352b2/a4f192d8ea824153b8ce543ef8db507a [2023-04-01 06:41:18,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:41:18,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:41:18,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:41:18,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:41:18,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:41:18,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:41:18" (1/1) ... [2023-04-01 06:41:18,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48536a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:18, skipping insertion in model container [2023-04-01 06:41:18,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:41:18" (1/1) ... [2023-04-01 06:41:18,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:41:18,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:41:18,889 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.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[13915,13928] [2023-04-01 06:41:18,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:41:18,958 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:41:19,051 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.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[13915,13928] [2023-04-01 06:41:19,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:41:19,138 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:41:19,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19 WrapperNode [2023-04-01 06:41:19,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:41:19,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:41:19,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:41:19,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:41:19,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19" (1/1) ... [2023-04-01 06:41:19,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19" (1/1) ... [2023-04-01 06:41:19,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19" (1/1) ... [2023-04-01 06:41:19,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19" (1/1) ... [2023-04-01 06:41:19,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19" (1/1) ... [2023-04-01 06:41:19,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19" (1/1) ... [2023-04-01 06:41:19,211 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19" (1/1) ... [2023-04-01 06:41:19,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19" (1/1) ... [2023-04-01 06:41:19,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:41:19,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:41:19,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:41:19,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:41:19,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19" (1/1) ... [2023-04-01 06:41:19,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:41:19,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:41:19,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:41:19,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:41:19,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:41:19,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:41:19,313 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:41:19,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:41:19,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:41:19,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:41:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:41:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:41:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:41:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:41:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:41:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:41:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:41:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:41:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:41:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:41:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:41:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:41:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:41:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:41:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:41:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-01 06:41:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:41:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:41:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:41:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:41:19,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:41:19,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:41:19,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:41:19,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:41:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:41:19,559 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:41:19,561 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:41:20,366 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:41:20,654 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:41:20,654 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:41:20,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:41:20 BoogieIcfgContainer [2023-04-01 06:41:20,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:41:20,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:41:20,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:41:20,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:41:20,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:41:18" (1/3) ... [2023-04-01 06:41:20,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3421a5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:41:20, skipping insertion in model container [2023-04-01 06:41:20,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:19" (2/3) ... [2023-04-01 06:41:20,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3421a5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:41:20, skipping insertion in model container [2023-04-01 06:41:20,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:41:20" (3/3) ... [2023-04-01 06:41:20,666 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-04-01 06:41:20,682 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:41:20,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:41:20,748 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:41:20,754 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;@69656384, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:41:20,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:41:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 264 states, 216 states have (on average 1.6203703703703705) internal successors, (350), 259 states have internal predecessors, (350), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:41:20,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 06:41:20,783 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:20,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:20,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:20,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:20,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1595821782, now seen corresponding path program 1 times [2023-04-01 06:41:20,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:20,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190815731] [2023-04-01 06:41:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:20,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:21,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:21,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190815731] [2023-04-01 06:41:21,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190815731] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:21,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:21,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:41:21,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955839537] [2023-04-01 06:41:21,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:21,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:41:21,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:21,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:41:21,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:41:21,508 INFO L87 Difference]: Start difference. First operand has 264 states, 216 states have (on average 1.6203703703703705) internal successors, (350), 259 states have internal predecessors, (350), 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 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:21,776 INFO L93 Difference]: Finished difference Result 447 states and 625 transitions. [2023-04-01 06:41:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:21,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-01 06:41:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:21,790 INFO L225 Difference]: With dead ends: 447 [2023-04-01 06:41:21,790 INFO L226 Difference]: Without dead ends: 218 [2023-04-01 06:41:21,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:21,800 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 268 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:21,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 688 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-04-01 06:41:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2023-04-01 06:41:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 214 states have (on average 1.397196261682243) internal successors, (299), 214 states have internal predecessors, (299), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 302 transitions. [2023-04-01 06:41:21,867 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 302 transitions. Word has length 70 [2023-04-01 06:41:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:21,868 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 302 transitions. [2023-04-01 06:41:21,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 302 transitions. [2023-04-01 06:41:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-01 06:41:21,871 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:21,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:21,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:41:21,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:21,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash -856320728, now seen corresponding path program 1 times [2023-04-01 06:41:21,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:21,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496179789] [2023-04-01 06:41:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:21,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:22,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:22,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496179789] [2023-04-01 06:41:22,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496179789] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:22,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:22,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:22,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880835746] [2023-04-01 06:41:22,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:22,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:22,043 INFO L87 Difference]: Start difference. First operand 218 states and 302 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:22,219 INFO L93 Difference]: Finished difference Result 500 states and 721 transitions. [2023-04-01 06:41:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2023-04-01 06:41:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:22,228 INFO L225 Difference]: With dead ends: 500 [2023-04-01 06:41:22,228 INFO L226 Difference]: Without dead ends: 334 [2023-04-01 06:41:22,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:22,234 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 192 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:22,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 534 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-04-01 06:41:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2023-04-01 06:41:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 328 states have (on average 1.423780487804878) internal successors, (467), 328 states have internal predecessors, (467), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 470 transitions. [2023-04-01 06:41:22,274 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 470 transitions. Word has length 109 [2023-04-01 06:41:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:22,275 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 470 transitions. [2023-04-01 06:41:22,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 470 transitions. [2023-04-01 06:41:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 06:41:22,279 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:22,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:22,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:41:22,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:22,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash 808249919, now seen corresponding path program 1 times [2023-04-01 06:41:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:22,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432277170] [2023-04-01 06:41:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:22,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:22,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432277170] [2023-04-01 06:41:22,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432277170] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:22,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:22,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:22,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25403214] [2023-04-01 06:41:22,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:22,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:22,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:22,428 INFO L87 Difference]: Start difference. First operand 332 states and 470 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:22,596 INFO L93 Difference]: Finished difference Result 816 states and 1188 transitions. [2023-04-01 06:41:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:22,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2023-04-01 06:41:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:22,599 INFO L225 Difference]: With dead ends: 816 [2023-04-01 06:41:22,599 INFO L226 Difference]: Without dead ends: 542 [2023-04-01 06:41:22,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:22,601 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 186 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:22,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 530 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-04-01 06:41:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2023-04-01 06:41:22,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 536 states have (on average 1.4402985074626866) internal successors, (772), 536 states have internal predecessors, (772), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 775 transitions. [2023-04-01 06:41:22,660 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 775 transitions. Word has length 115 [2023-04-01 06:41:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:22,661 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 775 transitions. [2023-04-01 06:41:22,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 775 transitions. [2023-04-01 06:41:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 06:41:22,663 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:22,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:22,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:41:22,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:22,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1504035490, now seen corresponding path program 1 times [2023-04-01 06:41:22,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:22,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791523484] [2023-04-01 06:41:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:22,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:22,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:22,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791523484] [2023-04-01 06:41:22,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791523484] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:22,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:22,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:22,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128588695] [2023-04-01 06:41:22,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:22,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:22,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:22,776 INFO L87 Difference]: Start difference. First operand 540 states and 775 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:22,967 INFO L93 Difference]: Finished difference Result 1394 states and 2036 transitions. [2023-04-01 06:41:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2023-04-01 06:41:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:22,974 INFO L225 Difference]: With dead ends: 1394 [2023-04-01 06:41:22,974 INFO L226 Difference]: Without dead ends: 918 [2023-04-01 06:41:22,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:22,983 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 181 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:22,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 474 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-04-01 06:41:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 916. [2023-04-01 06:41:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 912 states have (on average 1.4462719298245614) internal successors, (1319), 912 states have internal predecessors, (1319), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1322 transitions. [2023-04-01 06:41:23,086 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1322 transitions. Word has length 121 [2023-04-01 06:41:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:23,088 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1322 transitions. [2023-04-01 06:41:23,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1322 transitions. [2023-04-01 06:41:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-01 06:41:23,092 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:23,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:23,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:41:23,092 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:23,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash 345362315, now seen corresponding path program 1 times [2023-04-01 06:41:23,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:23,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574810076] [2023-04-01 06:41:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:23,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:23,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:23,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574810076] [2023-04-01 06:41:23,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574810076] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:23,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:23,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:23,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471928984] [2023-04-01 06:41:23,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:23,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:23,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:23,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:23,244 INFO L87 Difference]: Start difference. First operand 916 states and 1322 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:23,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:23,505 INFO L93 Difference]: Finished difference Result 2436 states and 3550 transitions. [2023-04-01 06:41:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:23,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2023-04-01 06:41:23,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:23,512 INFO L225 Difference]: With dead ends: 2436 [2023-04-01 06:41:23,512 INFO L226 Difference]: Without dead ends: 1590 [2023-04-01 06:41:23,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:23,517 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 174 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:23,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 522 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2023-04-01 06:41:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1588. [2023-04-01 06:41:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1584 states have (on average 1.4431818181818181) internal successors, (2286), 1584 states have internal predecessors, (2286), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 2289 transitions. [2023-04-01 06:41:23,727 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 2289 transitions. Word has length 127 [2023-04-01 06:41:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:23,727 INFO L495 AbstractCegarLoop]: Abstraction has 1588 states and 2289 transitions. [2023-04-01 06:41:23,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 2289 transitions. [2023-04-01 06:41:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 06:41:23,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:23,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:23,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:41:23,734 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:23,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:23,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1982107757, now seen corresponding path program 1 times [2023-04-01 06:41:23,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:23,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465098194] [2023-04-01 06:41:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:23,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:23,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:23,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465098194] [2023-04-01 06:41:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465098194] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:23,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:23,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485061227] [2023-04-01 06:41:23,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:23,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:23,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:23,875 INFO L87 Difference]: Start difference. First operand 1588 states and 2289 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:24,318 INFO L93 Difference]: Finished difference Result 4286 states and 6204 transitions. [2023-04-01 06:41:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:24,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2023-04-01 06:41:24,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:24,330 INFO L225 Difference]: With dead ends: 4286 [2023-04-01 06:41:24,330 INFO L226 Difference]: Without dead ends: 2774 [2023-04-01 06:41:24,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:24,334 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 168 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:24,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 518 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2023-04-01 06:41:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 2772. [2023-04-01 06:41:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2768 states have (on average 1.432442196531792) internal successors, (3965), 2768 states have internal predecessors, (3965), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 3968 transitions. [2023-04-01 06:41:24,767 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 3968 transitions. Word has length 133 [2023-04-01 06:41:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:24,769 INFO L495 AbstractCegarLoop]: Abstraction has 2772 states and 3968 transitions. [2023-04-01 06:41:24,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 3968 transitions. [2023-04-01 06:41:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-01 06:41:24,776 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:24,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:24,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:41:24,777 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:24,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 888969231, now seen corresponding path program 1 times [2023-04-01 06:41:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:24,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528394109] [2023-04-01 06:41:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:24,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:24,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:24,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528394109] [2023-04-01 06:41:24,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528394109] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:24,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:24,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:24,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798930000] [2023-04-01 06:41:24,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:24,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:24,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:24,910 INFO L87 Difference]: Start difference. First operand 2772 states and 3968 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:25,674 INFO L93 Difference]: Finished difference Result 7512 states and 10754 transitions. [2023-04-01 06:41:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2023-04-01 06:41:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:25,692 INFO L225 Difference]: With dead ends: 7512 [2023-04-01 06:41:25,693 INFO L226 Difference]: Without dead ends: 4822 [2023-04-01 06:41:25,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:25,700 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 162 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:25,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 514 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2023-04-01 06:41:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 4820. [2023-04-01 06:41:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4820 states, 4816 states have (on average 1.4144518272425248) internal successors, (6812), 4816 states have internal predecessors, (6812), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4820 states to 4820 states and 6815 transitions. [2023-04-01 06:41:26,290 INFO L78 Accepts]: Start accepts. Automaton has 4820 states and 6815 transitions. Word has length 139 [2023-04-01 06:41:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:26,290 INFO L495 AbstractCegarLoop]: Abstraction has 4820 states and 6815 transitions. [2023-04-01 06:41:26,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4820 states and 6815 transitions. [2023-04-01 06:41:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 06:41:26,301 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:26,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:26,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:41:26,301 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:26,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:26,302 INFO L85 PathProgramCache]: Analyzing trace with hash 456173157, now seen corresponding path program 1 times [2023-04-01 06:41:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:26,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419674844] [2023-04-01 06:41:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:26,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:26,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:26,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419674844] [2023-04-01 06:41:26,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419674844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:26,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:26,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 06:41:26,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184476473] [2023-04-01 06:41:26,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:26,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:41:26,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:26,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:41:26,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:41:26,639 INFO L87 Difference]: Start difference. First operand 4820 states and 6815 transitions. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:29,125 INFO L93 Difference]: Finished difference Result 17189 states and 24159 transitions. [2023-04-01 06:41:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 06:41:29,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2023-04-01 06:41:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:29,176 INFO L225 Difference]: With dead ends: 17189 [2023-04-01 06:41:29,176 INFO L226 Difference]: Without dead ends: 12456 [2023-04-01 06:41:29,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:41:29,190 INFO L413 NwaCegarLoop]: 1643 mSDtfsCounter, 1529 mSDsluCounter, 4718 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 6361 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:29,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1529 Valid, 6361 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:41:29,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12456 states. [2023-04-01 06:41:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12456 to 6344. [2023-04-01 06:41:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6344 states, 6340 states have (on average 1.3847003154574133) internal successors, (8779), 6340 states have internal predecessors, (8779), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6344 states to 6344 states and 8782 transitions. [2023-04-01 06:41:30,327 INFO L78 Accepts]: Start accepts. Automaton has 6344 states and 8782 transitions. Word has length 145 [2023-04-01 06:41:30,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:30,327 INFO L495 AbstractCegarLoop]: Abstraction has 6344 states and 8782 transitions. [2023-04-01 06:41:30,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6344 states and 8782 transitions. [2023-04-01 06:41:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 06:41:30,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:30,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:30,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:41:30,362 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:30,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1752957886, now seen corresponding path program 1 times [2023-04-01 06:41:30,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:30,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840666513] [2023-04-01 06:41:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:30,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:30,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:30,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840666513] [2023-04-01 06:41:30,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840666513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:30,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:30,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 06:41:30,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936710364] [2023-04-01 06:41:30,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:30,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:41:30,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:41:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:41:30,830 INFO L87 Difference]: Start difference. First operand 6344 states and 8782 transitions. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:32,059 INFO L93 Difference]: Finished difference Result 12603 states and 17464 transitions. [2023-04-01 06:41:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 06:41:32,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2023-04-01 06:41:32,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:32,093 INFO L225 Difference]: With dead ends: 12603 [2023-04-01 06:41:32,093 INFO L226 Difference]: Without dead ends: 6346 [2023-04-01 06:41:32,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-01 06:41:32,111 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 230 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:32,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1416 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:41:32,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6346 states. [2023-04-01 06:41:32,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6346 to 6344. [2023-04-01 06:41:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6344 states, 6340 states have (on average 1.3840694006309149) internal successors, (8775), 6340 states have internal predecessors, (8775), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6344 states to 6344 states and 8778 transitions. [2023-04-01 06:41:32,981 INFO L78 Accepts]: Start accepts. Automaton has 6344 states and 8778 transitions. Word has length 147 [2023-04-01 06:41:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:32,981 INFO L495 AbstractCegarLoop]: Abstraction has 6344 states and 8778 transitions. [2023-04-01 06:41:32,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 6344 states and 8778 transitions. [2023-04-01 06:41:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 06:41:32,994 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:32,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:32,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:41:32,995 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:32,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1165244701, now seen corresponding path program 1 times [2023-04-01 06:41:32,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:32,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419006013] [2023-04-01 06:41:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:32,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:33,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:33,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419006013] [2023-04-01 06:41:33,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419006013] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:33,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:33,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:33,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053108966] [2023-04-01 06:41:33,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:33,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:33,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:33,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:33,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:33,149 INFO L87 Difference]: Start difference. First operand 6344 states and 8778 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:34,652 INFO L93 Difference]: Finished difference Result 15567 states and 21662 transitions. [2023-04-01 06:41:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2023-04-01 06:41:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:34,675 INFO L225 Difference]: With dead ends: 15567 [2023-04-01 06:41:34,675 INFO L226 Difference]: Without dead ends: 9309 [2023-04-01 06:41:34,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:34,692 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 211 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:34,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 589 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9309 states. [2023-04-01 06:41:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9309 to 9307. [2023-04-01 06:41:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9307 states, 9303 states have (on average 1.3844996237772762) internal successors, (12880), 9303 states have internal predecessors, (12880), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9307 states to 9307 states and 12883 transitions. [2023-04-01 06:41:36,117 INFO L78 Accepts]: Start accepts. Automaton has 9307 states and 12883 transitions. Word has length 147 [2023-04-01 06:41:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:36,117 INFO L495 AbstractCegarLoop]: Abstraction has 9307 states and 12883 transitions. [2023-04-01 06:41:36,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 9307 states and 12883 transitions. [2023-04-01 06:41:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 06:41:36,136 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:36,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:36,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:41:36,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:36,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:36,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1814154826, now seen corresponding path program 1 times [2023-04-01 06:41:36,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:36,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52069025] [2023-04-01 06:41:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:36,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:36,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:36,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52069025] [2023-04-01 06:41:36,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52069025] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:36,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:36,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:36,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75649529] [2023-04-01 06:41:36,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:36,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:36,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:36,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:36,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:36,336 INFO L87 Difference]: Start difference. First operand 9307 states and 12883 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:38,167 INFO L93 Difference]: Finished difference Result 18534 states and 25674 transitions. [2023-04-01 06:41:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:38,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 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 148 [2023-04-01 06:41:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:38,191 INFO L225 Difference]: With dead ends: 18534 [2023-04-01 06:41:38,192 INFO L226 Difference]: Without dead ends: 9307 [2023-04-01 06:41:38,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:41:38,213 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 737 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:38,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 191 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:41:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2023-04-01 06:41:39,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 9307. [2023-04-01 06:41:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9307 states, 9303 states have (on average 1.3702031602708804) internal successors, (12747), 9303 states have internal predecessors, (12747), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9307 states to 9307 states and 12750 transitions. [2023-04-01 06:41:39,876 INFO L78 Accepts]: Start accepts. Automaton has 9307 states and 12750 transitions. Word has length 148 [2023-04-01 06:41:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:39,876 INFO L495 AbstractCegarLoop]: Abstraction has 9307 states and 12750 transitions. [2023-04-01 06:41:39,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:39,877 INFO L276 IsEmpty]: Start isEmpty. Operand 9307 states and 12750 transitions. [2023-04-01 06:41:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 06:41:39,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:39,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:39,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:41:39,896 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:39,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:39,897 INFO L85 PathProgramCache]: Analyzing trace with hash 63268394, now seen corresponding path program 1 times [2023-04-01 06:41:39,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:39,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724185698] [2023-04-01 06:41:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:39,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:40,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:40,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724185698] [2023-04-01 06:41:40,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724185698] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:40,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:40,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:40,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893476804] [2023-04-01 06:41:40,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:40,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:40,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:40,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:40,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:40,095 INFO L87 Difference]: Start difference. First operand 9307 states and 12750 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:41,700 INFO L93 Difference]: Finished difference Result 18558 states and 25440 transitions. [2023-04-01 06:41:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 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 148 [2023-04-01 06:41:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:41,723 INFO L225 Difference]: With dead ends: 18558 [2023-04-01 06:41:41,723 INFO L226 Difference]: Without dead ends: 9307 [2023-04-01 06:41:41,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:41:41,740 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 777 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:41,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 159 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:41:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2023-04-01 06:41:43,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 9307. [2023-04-01 06:41:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9307 states, 9303 states have (on average 1.3526819305600344) internal successors, (12584), 9303 states have internal predecessors, (12584), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9307 states to 9307 states and 12587 transitions. [2023-04-01 06:41:43,205 INFO L78 Accepts]: Start accepts. Automaton has 9307 states and 12587 transitions. Word has length 148 [2023-04-01 06:41:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:43,205 INFO L495 AbstractCegarLoop]: Abstraction has 9307 states and 12587 transitions. [2023-04-01 06:41:43,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9307 states and 12587 transitions. [2023-04-01 06:41:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 06:41:43,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:43,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:43,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 06:41:43,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:43,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1433514486, now seen corresponding path program 1 times [2023-04-01 06:41:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:43,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601728341] [2023-04-01 06:41:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:43,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:43,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:43,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601728341] [2023-04-01 06:41:43,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601728341] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:43,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:43,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:43,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657155957] [2023-04-01 06:41:43,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:43,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:43,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:43,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:43,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:43,396 INFO L87 Difference]: Start difference. First operand 9307 states and 12587 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:45,130 INFO L93 Difference]: Finished difference Result 18546 states and 25099 transitions. [2023-04-01 06:41:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:45,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 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 148 [2023-04-01 06:41:45,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:45,151 INFO L225 Difference]: With dead ends: 18546 [2023-04-01 06:41:45,152 INFO L226 Difference]: Without dead ends: 9307 [2023-04-01 06:41:45,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:41:45,168 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 739 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:45,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 175 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:41:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2023-04-01 06:41:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 9307. [2023-04-01 06:41:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9307 states, 9303 states have (on average 1.3396753735354188) internal successors, (12463), 9303 states have internal predecessors, (12463), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9307 states to 9307 states and 12466 transitions. [2023-04-01 06:41:46,860 INFO L78 Accepts]: Start accepts. Automaton has 9307 states and 12466 transitions. Word has length 148 [2023-04-01 06:41:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:46,861 INFO L495 AbstractCegarLoop]: Abstraction has 9307 states and 12466 transitions. [2023-04-01 06:41:46,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 9307 states and 12466 transitions. [2023-04-01 06:41:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 06:41:46,878 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:46,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:46,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 06:41:46,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:46,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2147323370, now seen corresponding path program 1 times [2023-04-01 06:41:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:46,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592148463] [2023-04-01 06:41:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:46,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:47,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:47,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592148463] [2023-04-01 06:41:47,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592148463] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:47,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:47,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:47,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322259] [2023-04-01 06:41:47,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:47,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:47,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:47,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:47,051 INFO L87 Difference]: Start difference. First operand 9307 states and 12466 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:48,775 INFO L93 Difference]: Finished difference Result 18540 states and 24850 transitions. [2023-04-01 06:41:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:48,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 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 148 [2023-04-01 06:41:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:48,793 INFO L225 Difference]: With dead ends: 18540 [2023-04-01 06:41:48,793 INFO L226 Difference]: Without dead ends: 9307 [2023-04-01 06:41:48,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:41:48,812 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 714 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:48,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 183 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:41:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2023-04-01 06:41:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 9307. [2023-04-01 06:41:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9307 states, 9303 states have (on average 1.326668816510803) internal successors, (12342), 9303 states have internal predecessors, (12342), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9307 states to 9307 states and 12345 transitions. [2023-04-01 06:41:50,585 INFO L78 Accepts]: Start accepts. Automaton has 9307 states and 12345 transitions. Word has length 148 [2023-04-01 06:41:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:50,585 INFO L495 AbstractCegarLoop]: Abstraction has 9307 states and 12345 transitions. [2023-04-01 06:41:50,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 9307 states and 12345 transitions. [2023-04-01 06:41:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 06:41:50,604 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:50,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:50,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 06:41:50,604 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:50,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:50,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1614668298, now seen corresponding path program 1 times [2023-04-01 06:41:50,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:50,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144020311] [2023-04-01 06:41:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:50,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:51,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:51,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144020311] [2023-04-01 06:41:51,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144020311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:51,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:51,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:41:51,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81088600] [2023-04-01 06:41:51,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:51,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:41:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:41:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:41:51,217 INFO L87 Difference]: Start difference. First operand 9307 states and 12345 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:52,692 INFO L93 Difference]: Finished difference Result 16338 states and 21638 transitions. [2023-04-01 06:41:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:41:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2023-04-01 06:41:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:52,705 INFO L225 Difference]: With dead ends: 16338 [2023-04-01 06:41:52,705 INFO L226 Difference]: Without dead ends: 8838 [2023-04-01 06:41:52,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:52,720 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 1 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:52,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 766 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8838 states. [2023-04-01 06:41:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8838 to 8838. [2023-04-01 06:41:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8838 states, 8834 states have (on average 1.3111840615802581) internal successors, (11583), 8834 states have internal predecessors, (11583), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8838 states to 8838 states and 11586 transitions. [2023-04-01 06:41:54,199 INFO L78 Accepts]: Start accepts. Automaton has 8838 states and 11586 transitions. Word has length 148 [2023-04-01 06:41:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:54,200 INFO L495 AbstractCegarLoop]: Abstraction has 8838 states and 11586 transitions. [2023-04-01 06:41:54,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 8838 states and 11586 transitions. [2023-04-01 06:41:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 06:41:54,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:54,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:54,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 06:41:54,213 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:54,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:54,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1895434057, now seen corresponding path program 1 times [2023-04-01 06:41:54,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:54,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752756474] [2023-04-01 06:41:54,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:54,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:54,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:54,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752756474] [2023-04-01 06:41:54,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752756474] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:54,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:54,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:54,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062541087] [2023-04-01 06:41:54,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:54,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:54,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:54,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:54,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:54,302 INFO L87 Difference]: Start difference. First operand 8838 states and 11586 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:55,666 INFO L93 Difference]: Finished difference Result 12295 states and 16176 transitions. [2023-04-01 06:41:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:55,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2023-04-01 06:41:55,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:55,677 INFO L225 Difference]: With dead ends: 12295 [2023-04-01 06:41:55,678 INFO L226 Difference]: Without dead ends: 8200 [2023-04-01 06:41:55,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:55,684 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 0 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:55,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 499 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:41:55,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8200 states. [2023-04-01 06:41:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8200 to 5582. [2023-04-01 06:41:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5582 states, 5578 states have (on average 1.2837934743635713) internal successors, (7161), 5578 states have internal predecessors, (7161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5582 states to 5582 states and 7164 transitions. [2023-04-01 06:41:56,520 INFO L78 Accepts]: Start accepts. Automaton has 5582 states and 7164 transitions. Word has length 150 [2023-04-01 06:41:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:56,520 INFO L495 AbstractCegarLoop]: Abstraction has 5582 states and 7164 transitions. [2023-04-01 06:41:56,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 5582 states and 7164 transitions. [2023-04-01 06:41:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-01 06:41:56,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:56,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:56,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 06:41:56,527 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:56,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1052827893, now seen corresponding path program 1 times [2023-04-01 06:41:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:56,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095442525] [2023-04-01 06:41:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:56,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:56,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:56,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095442525] [2023-04-01 06:41:56,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095442525] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:56,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:56,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:56,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749592156] [2023-04-01 06:41:56,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:56,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:56,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:56,649 INFO L87 Difference]: Start difference. First operand 5582 states and 7164 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:58,652 INFO L93 Difference]: Finished difference Result 15806 states and 20308 transitions. [2023-04-01 06:41:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:58,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (2), 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 154 [2023-04-01 06:41:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:58,665 INFO L225 Difference]: With dead ends: 15806 [2023-04-01 06:41:58,665 INFO L226 Difference]: Without dead ends: 11026 [2023-04-01 06:41:58,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:58,673 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 174 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:58,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 305 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:41:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11026 states. [2023-04-01 06:42:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11026 to 11024. [2023-04-01 06:42:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11024 states, 11020 states have (on average 1.2730490018148821) internal successors, (14029), 11020 states have internal predecessors, (14029), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:42:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11024 states to 11024 states and 14032 transitions. [2023-04-01 06:42:00,446 INFO L78 Accepts]: Start accepts. Automaton has 11024 states and 14032 transitions. Word has length 154 [2023-04-01 06:42:00,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:00,446 INFO L495 AbstractCegarLoop]: Abstraction has 11024 states and 14032 transitions. [2023-04-01 06:42:00,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:42:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 11024 states and 14032 transitions. [2023-04-01 06:42:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-01 06:42:00,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:00,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:42:00,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 06:42:00,459 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:00,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:00,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1868601665, now seen corresponding path program 1 times [2023-04-01 06:42:00,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:00,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522732991] [2023-04-01 06:42:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:00,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:42:00,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:00,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522732991] [2023-04-01 06:42:00,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522732991] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:00,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:00,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:42:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923314321] [2023-04-01 06:42:00,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:00,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:42:00,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:42:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:00,614 INFO L87 Difference]: Start difference. First operand 11024 states and 14032 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:42:02,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:02,029 INFO L93 Difference]: Finished difference Result 17792 states and 22838 transitions. [2023-04-01 06:42:02,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:42:02,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (2), 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 154 [2023-04-01 06:42:02,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:02,039 INFO L225 Difference]: With dead ends: 17792 [2023-04-01 06:42:02,039 INFO L226 Difference]: Without dead ends: 8294 [2023-04-01 06:42:02,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:02,048 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 105 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:02,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 443 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:42:02,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8294 states. [2023-04-01 06:42:03,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8294 to 7624. [2023-04-01 06:42:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7624 states, 7620 states have (on average 1.270997375328084) internal successors, (9685), 7620 states have internal predecessors, (9685), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:42:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7624 states to 7624 states and 9688 transitions. [2023-04-01 06:42:03,319 INFO L78 Accepts]: Start accepts. Automaton has 7624 states and 9688 transitions. Word has length 154 [2023-04-01 06:42:03,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:03,320 INFO L495 AbstractCegarLoop]: Abstraction has 7624 states and 9688 transitions. [2023-04-01 06:42:03,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:42:03,320 INFO L276 IsEmpty]: Start isEmpty. Operand 7624 states and 9688 transitions. [2023-04-01 06:42:03,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-01 06:42:03,326 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:03,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:42:03,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 06:42:03,327 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:03,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash -684302620, now seen corresponding path program 1 times [2023-04-01 06:42:03,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:03,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238631427] [2023-04-01 06:42:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:03,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat