/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.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:41:33,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:41:33,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:41:33,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:41:33,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:41:33,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:41:33,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:41:33,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:41:33,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:41:33,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:41:33,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:41:33,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:41:33,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:41:33,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:41:33,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:41:33,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:41:33,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:41:33,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:41:33,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:41:33,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:41:33,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:41:33,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:41:33,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:41:33,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:41:33,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:41:33,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:41:33,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:41:33,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:41:33,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:41:33,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:41:33,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:41:33,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:41:33,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:41:33,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:41:33,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:41:33,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:41:33,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:41:33,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:41:33,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:41:33,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:41:33,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:41:33,878 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 06:41:33,897 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:41:33,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:41:33,898 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:41:33,898 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:41:33,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:41:33,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:41:33,899 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:41:33,899 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:41:33,899 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:41:33,899 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:41:33,900 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:41:33,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:41:33,900 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:41:33,900 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:41:33,900 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:41:33,900 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:41:33,900 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:41:33,901 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:41:33,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:41:33,901 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:41:33,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:41:33,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:41:33,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:41:33,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:41:33,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:41:33,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:41:33,902 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:41:33,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:41:33,903 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:41:33,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:41:33,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:41:33,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:41:33,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:41:33,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:41:33,903 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:41:33,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:41:33,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:41:33,904 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:41:33,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:41:33,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:41:33,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:41:33,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:41:34,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:41:34,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:41:34,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:41:34,131 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:41:34,132 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:41:34,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2023-04-01 06:41:35,111 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:41:35,273 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:41:35,274 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2023-04-01 06:41:35,281 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a06d48a4/2443aef600a44e62a5509ef3ba494975/FLAGa8e999194 [2023-04-01 06:41:35,294 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a06d48a4/2443aef600a44e62a5509ef3ba494975 [2023-04-01 06:41:35,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:41:35,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:41:35,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:41:35,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:41:35,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:41:35,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a83b25b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35, skipping insertion in model container [2023-04-01 06:41:35,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:41:35,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:41:35,571 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.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10527,10540] [2023-04-01 06:41:35,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:41:35,649 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:41:35,693 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.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10527,10540] [2023-04-01 06:41:35,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:41:35,732 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:41:35,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35 WrapperNode [2023-04-01 06:41:35,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:41:35,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:41:35,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:41:35,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:41:35,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,771 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:41:35,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:41:35,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:41:35,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:41:35,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35" (1/1) ... [2023-04-01 06:41:35,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:41:35,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:41:35,798 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 06:41:35,814 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 06:41:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:41:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:41:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:41:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:41:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:41:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:41:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:41:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:41:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:41:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:41:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:41:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:41:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:41:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:41:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:41:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:41:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:41:35,830 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:41:35,830 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:41:35,830 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:41:35,830 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-01 06:41:35,830 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2023-04-01 06:41:35,830 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:41:35,830 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:41:35,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:41:35,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:41:35,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:41:35,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:41:35,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:41:35,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:41:35,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:41:35,929 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:41:35,931 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:41:36,550 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:41:36,668 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:41:36,668 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:41:36,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:41:36 BoogieIcfgContainer [2023-04-01 06:41:36,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:41:36,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:41:36,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:41:36,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:41:36,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:41:35" (1/3) ... [2023-04-01 06:41:36,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392f91e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:41:36, skipping insertion in model container [2023-04-01 06:41:36,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:41:35" (2/3) ... [2023-04-01 06:41:36,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392f91e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:41:36, skipping insertion in model container [2023-04-01 06:41:36,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:41:36" (3/3) ... [2023-04-01 06:41:36,677 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2023-04-01 06:41:36,690 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:41:36,691 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:41:36,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:41:36,736 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;@3ccf04e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:41:36,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:41:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 147 states have (on average 1.7687074829931972) internal successors, (260), 149 states have internal predecessors, (260), 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 06:41:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 06:41:36,749 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:36,749 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] [2023-04-01 06:41:36,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:36,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:36,754 INFO L85 PathProgramCache]: Analyzing trace with hash 942289555, now seen corresponding path program 1 times [2023-04-01 06:41:36,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:36,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658472284] [2023-04-01 06:41:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:36,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:37,308 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 06:41:37,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:37,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658472284] [2023-04-01 06:41:37,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658472284] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:37,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:37,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:37,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778083378] [2023-04-01 06:41:37,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:37,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:37,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:37,336 INFO L87 Difference]: Start difference. First operand has 154 states, 147 states have (on average 1.7687074829931972) internal successors, (260), 149 states have internal predecessors, (260), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 06:41:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:37,593 INFO L93 Difference]: Finished difference Result 236 states and 384 transitions. [2023-04-01 06:41:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 97 [2023-04-01 06:41:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:37,603 INFO L225 Difference]: With dead ends: 236 [2023-04-01 06:41:37,603 INFO L226 Difference]: Without dead ends: 149 [2023-04-01 06:41:37,606 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 06:41:37,610 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 606 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:37,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 261 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:41:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-01 06:41:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-04-01 06:41:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.206896551724138) internal successors, (175), 145 states have internal predecessors, (175), 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 06:41:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2023-04-01 06:41:37,664 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 97 [2023-04-01 06:41:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:37,665 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2023-04-01 06:41:37,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 06:41:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2023-04-01 06:41:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 06:41:37,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:37,669 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] [2023-04-01 06:41:37,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:41:37,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:37,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:37,671 INFO L85 PathProgramCache]: Analyzing trace with hash 608585704, now seen corresponding path program 1 times [2023-04-01 06:41:37,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:37,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022841345] [2023-04-01 06:41:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:37,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:37,888 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 06:41:37,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:37,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022841345] [2023-04-01 06:41:37,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022841345] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:37,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:37,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:37,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443348550] [2023-04-01 06:41:37,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:37,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:37,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:37,890 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 06:41:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:38,004 INFO L93 Difference]: Finished difference Result 234 states and 290 transitions. [2023-04-01 06:41:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:38,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 98 [2023-04-01 06:41:38,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:38,011 INFO L225 Difference]: With dead ends: 234 [2023-04-01 06:41:38,011 INFO L226 Difference]: Without dead ends: 149 [2023-04-01 06:41:38,014 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 06:41:38,016 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 443 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:38,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 107 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-01 06:41:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-04-01 06:41:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 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 06:41:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 176 transitions. [2023-04-01 06:41:38,030 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 176 transitions. Word has length 98 [2023-04-01 06:41:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:38,031 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 176 transitions. [2023-04-01 06:41:38,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 06:41:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 176 transitions. [2023-04-01 06:41:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 06:41:38,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:38,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:38,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:41:38,032 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:38,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:38,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2021082765, now seen corresponding path program 1 times [2023-04-01 06:41:38,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:38,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908277931] [2023-04-01 06:41:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:38,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:38,189 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 06:41:38,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908277931] [2023-04-01 06:41:38,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908277931] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:38,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:38,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:38,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139053914] [2023-04-01 06:41:38,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:38,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:38,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:38,191 INFO L87 Difference]: Start difference. First operand 149 states and 176 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 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 06:41:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:38,284 INFO L93 Difference]: Finished difference Result 230 states and 282 transitions. [2023-04-01 06:41:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 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 99 [2023-04-01 06:41:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:38,286 INFO L225 Difference]: With dead ends: 230 [2023-04-01 06:41:38,286 INFO L226 Difference]: Without dead ends: 149 [2023-04-01 06:41:38,286 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 06:41:38,287 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 425 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:38,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 115 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:38,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-01 06:41:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-04-01 06:41:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.1793103448275861) internal successors, (171), 145 states have internal predecessors, (171), 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 06:41:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2023-04-01 06:41:38,296 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 99 [2023-04-01 06:41:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:38,297 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2023-04-01 06:41:38,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 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 06:41:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2023-04-01 06:41:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 06:41:38,298 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:38,298 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] [2023-04-01 06:41:38,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:41:38,299 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:38,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:38,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1018486967, now seen corresponding path program 1 times [2023-04-01 06:41:38,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:38,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482951685] [2023-04-01 06:41:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:38,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:38,419 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 06:41:38,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:38,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482951685] [2023-04-01 06:41:38,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482951685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:38,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:38,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:38,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390444730] [2023-04-01 06:41:38,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:38,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:38,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:38,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:38,421 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 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 06:41:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:38,525 INFO L93 Difference]: Finished difference Result 214 states and 260 transitions. [2023-04-01 06:41:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:38,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 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 100 [2023-04-01 06:41:38,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:38,528 INFO L225 Difference]: With dead ends: 214 [2023-04-01 06:41:38,528 INFO L226 Difference]: Without dead ends: 149 [2023-04-01 06:41:38,530 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 06:41:38,535 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 374 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:38,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 147 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-01 06:41:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-04-01 06:41:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.1655172413793105) internal successors, (169), 145 states have internal predecessors, (169), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2023-04-01 06:41:38,554 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 100 [2023-04-01 06:41:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:38,554 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2023-04-01 06:41:38,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 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 06:41:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2023-04-01 06:41:38,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-01 06:41:38,558 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:38,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:38,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:41:38,558 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:38,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:38,559 INFO L85 PathProgramCache]: Analyzing trace with hash 207228021, now seen corresponding path program 1 times [2023-04-01 06:41:38,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:38,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668310685] [2023-04-01 06:41:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:38,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:38,738 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 06:41:38,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:38,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668310685] [2023-04-01 06:41:38,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668310685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:38,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:38,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:38,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677691101] [2023-04-01 06:41:38,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:38,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:38,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:38,745 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 06:41:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:38,832 INFO L93 Difference]: Finished difference Result 226 states and 270 transitions. [2023-04-01 06:41:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:38,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 101 [2023-04-01 06:41:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:38,834 INFO L225 Difference]: With dead ends: 226 [2023-04-01 06:41:38,834 INFO L226 Difference]: Without dead ends: 149 [2023-04-01 06:41:38,835 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 06:41:38,836 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 401 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:38,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 123 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:38,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-01 06:41:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-04-01 06:41:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 145 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2023-04-01 06:41:38,851 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 101 [2023-04-01 06:41:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:38,851 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2023-04-01 06:41:38,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 06:41:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2023-04-01 06:41:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-01 06:41:38,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:38,852 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] [2023-04-01 06:41:38,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:41:38,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:38,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:38,853 INFO L85 PathProgramCache]: Analyzing trace with hash 618289768, now seen corresponding path program 1 times [2023-04-01 06:41:38,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:38,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953073010] [2023-04-01 06:41:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:38,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:38,962 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 06:41:38,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953073010] [2023-04-01 06:41:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953073010] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:38,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:38,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795527230] [2023-04-01 06:41:38,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:38,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:38,964 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 06:41:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:39,053 INFO L93 Difference]: Finished difference Result 222 states and 262 transitions. [2023-04-01 06:41:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 102 [2023-04-01 06:41:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:39,054 INFO L225 Difference]: With dead ends: 222 [2023-04-01 06:41:39,054 INFO L226 Difference]: Without dead ends: 149 [2023-04-01 06:41:39,054 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 06:41:39,055 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 383 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:39,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 131 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-01 06:41:39,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-04-01 06:41:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 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 06:41:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 168 transitions. [2023-04-01 06:41:39,081 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 168 transitions. Word has length 102 [2023-04-01 06:41:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:39,081 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 168 transitions. [2023-04-01 06:41:39,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 06:41:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 168 transitions. [2023-04-01 06:41:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 06:41:39,082 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:39,082 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] [2023-04-01 06:41:39,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:41:39,082 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:39,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:39,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2082666758, now seen corresponding path program 1 times [2023-04-01 06:41:39,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:39,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407039234] [2023-04-01 06:41:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:39,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:39,181 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 06:41:39,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:39,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407039234] [2023-04-01 06:41:39,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407039234] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:39,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:39,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:39,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352477634] [2023-04-01 06:41:39,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:39,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:39,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:39,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:39,182 INFO L87 Difference]: Start difference. First operand 149 states and 168 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 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 06:41:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:39,282 INFO L93 Difference]: Finished difference Result 238 states and 275 transitions. [2023-04-01 06:41:39,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:41:39,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 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 103 [2023-04-01 06:41:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:39,283 INFO L225 Difference]: With dead ends: 238 [2023-04-01 06:41:39,283 INFO L226 Difference]: Without dead ends: 149 [2023-04-01 06:41:39,283 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 06:41:39,284 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 353 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:39,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 132 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-01 06:41:39,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-04-01 06:41:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 145 states have internal predecessors, (164), 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 06:41:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2023-04-01 06:41:39,295 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 103 [2023-04-01 06:41:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:39,295 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2023-04-01 06:41:39,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 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 06:41:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2023-04-01 06:41:39,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 06:41:39,296 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:39,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:39,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:41:39,297 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:39,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:39,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1050145172, now seen corresponding path program 1 times [2023-04-01 06:41:39,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:39,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528158622] [2023-04-01 06:41:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:39,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:50,460 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 06:41:50,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:50,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528158622] [2023-04-01 06:41:50,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528158622] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:50,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:50,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2023-04-01 06:41:50,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081244640] [2023-04-01 06:41:50,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:50,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 06:41:50,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:50,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 06:41:50,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2228, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 06:41:50,463 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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 06:42:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:04,532 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2023-04-01 06:42:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-04-01 06:42:04,532 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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 104 [2023-04-01 06:42:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:04,533 INFO L225 Difference]: With dead ends: 257 [2023-04-01 06:42:04,533 INFO L226 Difference]: Without dead ends: 205 [2023-04-01 06:42:04,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1751, Invalid=6439, Unknown=0, NotChecked=0, Total=8190 [2023-04-01 06:42:04,536 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 1405 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:04,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1405 Valid, 1473 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 3226 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 06:42:04,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-04-01 06:42:04,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 198. [2023-04-01 06:42:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.1855670103092784) internal successors, (230), 194 states have internal predecessors, (230), 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 06:42:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 233 transitions. [2023-04-01 06:42:04,560 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 233 transitions. Word has length 104 [2023-04-01 06:42:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:04,560 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 233 transitions. [2023-04-01 06:42:04,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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 06:42:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 233 transitions. [2023-04-01 06:42:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 06:42:04,561 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:04,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:42:04,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:42:04,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:04,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:04,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1423807406, now seen corresponding path program 1 times [2023-04-01 06:42:04,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:04,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005465350] [2023-04-01 06:42:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:04,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:17,388 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 06:42:17,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:17,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005465350] [2023-04-01 06:42:17,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005465350] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:17,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:17,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2023-04-01 06:42:17,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408178305] [2023-04-01 06:42:17,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:17,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-04-01 06:42:17,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:17,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-04-01 06:42:17,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2507, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 06:42:17,390 INFO L87 Difference]: Start difference. First operand 198 states and 233 transitions. Second operand has 53 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 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)