/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.BOUNDED-12.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:40:52,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:40:52,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:40:52,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:40:52,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:40:52,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:40:52,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:40:52,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:40:52,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:40:52,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:40:52,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:40:52,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:40:52,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:40:52,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:40:52,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:40:52,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:40:52,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:40:52,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:40:52,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:40:52,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:40:52,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:40:52,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:40:52,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:40:52,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:40:52,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:40:52,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:40:52,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:40:52,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:40:52,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:40:52,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:40:52,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:40:52,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:40:52,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:40:52,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:40:52,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:40:52,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:40:52,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:40:52,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:40:52,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:40:52,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:40:52,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:40:52,807 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 06:40:52,835 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:40:52,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:40:52,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:40:52,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:40:52,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:40:52,837 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:40:52,837 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:40:52,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:40:52,837 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:40:52,837 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:40:52,838 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:40:52,838 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:40:52,838 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:40:52,838 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:40:52,838 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:40:52,839 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:40:52,839 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:40:52,839 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:40:52,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:40:52,840 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:40:52,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:40:52,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:40:52,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:40:52,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:40:52,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:40:52,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:40:52,841 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:40:52,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:40:52,841 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:40:52,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:40:52,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:40:52,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:40:52,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:40:52,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:40:52,842 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:40:52,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:40:52,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:40:52,842 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:40:52,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:40:52,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:40:52,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:40:52,843 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:40:53,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:40:53,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:40:53,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:40:53,063 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:40:53,063 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:40:53,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-01 06:40:54,108 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:40:54,270 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:40:54,271 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-01 06:40:54,280 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d139a73/5a62c6cf92fe4812849243e1afc01563/FLAG68083b5bc [2023-04-01 06:40:54,291 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d139a73/5a62c6cf92fe4812849243e1afc01563 [2023-04-01 06:40:54,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:40:54,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:40:54,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:40:54,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:40:54,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:40:54,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c1205b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54, skipping insertion in model container [2023-04-01 06:40:54,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:40:54,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:40:54,495 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.BOUNDED-12.pals.c.v+nlh-reducer.c[9241,9254] [2023-04-01 06:40:54,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:40:54,544 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:40:54,590 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.BOUNDED-12.pals.c.v+nlh-reducer.c[9241,9254] [2023-04-01 06:40:54,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:40:54,625 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:40:54,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54 WrapperNode [2023-04-01 06:40:54,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:40:54,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:40:54,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:40:54,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:40:54,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,694 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:40:54,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:40:54,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:40:54,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:40:54,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54" (1/1) ... [2023-04-01 06:40:54,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:40:54,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:40:54,745 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 06:40:54,746 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 06:40:54,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:40:54,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:40:54,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:40:54,770 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:40:54,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:40:54,770 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:40:54,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:40:54,770 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:40:54,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:40:54,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:40:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:40:54,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:40:54,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:40:54,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:40:54,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:40:54,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:40:54,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:40:54,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:40:54,915 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:40:54,917 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:40:55,428 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:40:55,540 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:40:55,540 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:40:55,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:40:55 BoogieIcfgContainer [2023-04-01 06:40:55,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:40:55,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:40:55,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:40:55,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:40:55,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:40:54" (1/3) ... [2023-04-01 06:40:55,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464a22f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:40:55, skipping insertion in model container [2023-04-01 06:40:55,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:40:54" (2/3) ... [2023-04-01 06:40:55,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464a22f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:40:55, skipping insertion in model container [2023-04-01 06:40:55,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:40:55" (3/3) ... [2023-04-01 06:40:55,555 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-01 06:40:55,568 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:40:55,569 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:40:55,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:40:55,619 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;@12622f40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:40:55,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:40:55,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 127 states have (on average 1.763779527559055) internal successors, (224), 129 states have internal predecessors, (224), 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 06:40:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 06:40:55,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:40:55,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:40:55,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:40:55,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:40:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1677577655, now seen corresponding path program 1 times [2023-04-01 06:40:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:40:55,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259898466] [2023-04-01 06:40:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:40:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:40:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:40:56,140 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 06:40:56,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:40:56,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259898466] [2023-04-01 06:40:56,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259898466] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:40:56,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:40:56,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:40:56,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138849555] [2023-04-01 06:40:56,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:40:56,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:40:56,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:40:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:40:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:40:56,179 INFO L87 Difference]: Start difference. First operand has 134 states, 127 states have (on average 1.763779527559055) internal successors, (224), 129 states have internal predecessors, (224), 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 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 06:40:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:40:56,422 INFO L93 Difference]: Finished difference Result 206 states and 332 transitions. [2023-04-01 06:40:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:40:56,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2023-04-01 06:40:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:40:56,436 INFO L225 Difference]: With dead ends: 206 [2023-04-01 06:40:56,436 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 06:40:56,442 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 06:40:56,447 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 508 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:40:56,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 238 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:40:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 06:40:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 06:40:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.208) internal successors, (151), 125 states have internal predecessors, (151), 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 06:40:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2023-04-01 06:40:56,515 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 82 [2023-04-01 06:40:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:40:56,515 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2023-04-01 06:40:56,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 06:40:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2023-04-01 06:40:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-01 06:40:56,517 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:40:56,517 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] [2023-04-01 06:40:56,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:40:56,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:40:56,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:40:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash 785829471, now seen corresponding path program 1 times [2023-04-01 06:40:56,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:40:56,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267595188] [2023-04-01 06:40:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:40:56,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:40:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:40:56,755 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 06:40:56,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:40:56,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267595188] [2023-04-01 06:40:56,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267595188] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:40:56,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:40:56,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:40:56,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714315882] [2023-04-01 06:40:56,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:40:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:40:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:40:56,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:40:56,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:40:56,760 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 06:40:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:40:56,886 INFO L93 Difference]: Finished difference Result 204 states and 252 transitions. [2023-04-01 06:40:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:40:56,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 83 [2023-04-01 06:40:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:40:56,893 INFO L225 Difference]: With dead ends: 204 [2023-04-01 06:40:56,894 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 06:40:56,897 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 06:40:56,899 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 381 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:40:56,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 94 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:40:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 06:40:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 06:40:56,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.192) internal successors, (149), 125 states have internal predecessors, (149), 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 06:40:56,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2023-04-01 06:40:56,916 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 83 [2023-04-01 06:40:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:40:56,916 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2023-04-01 06:40:56,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 06:40:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2023-04-01 06:40:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-01 06:40:56,924 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:40:56,924 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] [2023-04-01 06:40:56,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:40:56,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:40:56,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:40:56,926 INFO L85 PathProgramCache]: Analyzing trace with hash 243732681, now seen corresponding path program 1 times [2023-04-01 06:40:56,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:40:56,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943043842] [2023-04-01 06:40:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:40:56,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:40:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:40:57,099 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 06:40:57,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:40:57,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943043842] [2023-04-01 06:40:57,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943043842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:40:57,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:40:57,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:40:57,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492888443] [2023-04-01 06:40:57,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:40:57,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:40:57,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:40:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:40:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:40:57,102 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 06:40:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:40:57,198 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2023-04-01 06:40:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:40:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 84 [2023-04-01 06:40:57,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:40:57,201 INFO L225 Difference]: With dead ends: 200 [2023-04-01 06:40:57,201 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 06:40:57,203 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 06:40:57,206 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 363 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:40:57,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 102 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:40:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 06:40:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 06:40:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.176) internal successors, (147), 125 states have internal predecessors, (147), 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 06:40:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2023-04-01 06:40:57,229 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 84 [2023-04-01 06:40:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:40:57,231 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2023-04-01 06:40:57,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 06:40:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2023-04-01 06:40:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 06:40:57,232 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:40:57,233 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] [2023-04-01 06:40:57,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:40:57,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:40:57,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:40:57,234 INFO L85 PathProgramCache]: Analyzing trace with hash -328602288, now seen corresponding path program 1 times [2023-04-01 06:40:57,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:40:57,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772815414] [2023-04-01 06:40:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:40:57,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:40:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:40:57,373 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 06:40:57,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:40:57,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772815414] [2023-04-01 06:40:57,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772815414] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:40:57,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:40:57,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:40:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809038498] [2023-04-01 06:40:57,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:40:57,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:40:57,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:40:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:40:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:40:57,376 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 06:40:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:40:57,464 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2023-04-01 06:40:57,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:40:57,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 85 [2023-04-01 06:40:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:40:57,465 INFO L225 Difference]: With dead ends: 196 [2023-04-01 06:40:57,465 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 06:40:57,468 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 06:40:57,473 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 345 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:40:57,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 110 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:40:57,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 06:40:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 06:40:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.16) internal successors, (145), 125 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 06:40:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2023-04-01 06:40:57,488 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 85 [2023-04-01 06:40:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:40:57,488 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2023-04-01 06:40:57,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 06:40:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2023-04-01 06:40:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:40:57,492 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:40:57,493 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] [2023-04-01 06:40:57,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:40:57,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:40:57,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:40:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2066127336, now seen corresponding path program 1 times [2023-04-01 06:40:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:40:57,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953540291] [2023-04-01 06:40:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:40:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:40:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:40:57,642 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 06:40:57,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:40:57,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953540291] [2023-04-01 06:40:57,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953540291] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:40:57,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:40:57,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:40:57,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372836072] [2023-04-01 06:40:57,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:40:57,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:40:57,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:40:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:40:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:40:57,648 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 06:40:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:40:57,745 INFO L93 Difference]: Finished difference Result 192 states and 228 transitions. [2023-04-01 06:40:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:40:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 86 [2023-04-01 06:40:57,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:40:57,747 INFO L225 Difference]: With dead ends: 192 [2023-04-01 06:40:57,747 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 06:40:57,747 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 06:40:57,748 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 327 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:40:57,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 118 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:40:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 06:40:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 06:40:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.144) internal successors, (143), 125 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:40:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2023-04-01 06:40:57,758 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 86 [2023-04-01 06:40:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:40:57,759 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2023-04-01 06:40:57,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 06:40:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2023-04-01 06:40:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 06:40:57,760 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:40:57,760 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] [2023-04-01 06:40:57,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:40:57,760 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:40:57,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:40:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 710619073, now seen corresponding path program 1 times [2023-04-01 06:40:57,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:40:57,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095191986] [2023-04-01 06:40:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:40:57,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:40:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:40:57,883 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 06:40:57,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:40:57,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095191986] [2023-04-01 06:40:57,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095191986] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:40:57,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:40:57,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:40:57,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155645452] [2023-04-01 06:40:57,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:40:57,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:40:57,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:40:57,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:40:57,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:40:57,885 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 06:40:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:40:57,965 INFO L93 Difference]: Finished difference Result 208 states and 241 transitions. [2023-04-01 06:40:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:40:57,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 87 [2023-04-01 06:40:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:40:57,966 INFO L225 Difference]: With dead ends: 208 [2023-04-01 06:40:57,966 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 06:40:57,967 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 06:40:57,968 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 368 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:40:57,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 86 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:40:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 06:40:57,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 06:40:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.128) internal successors, (141), 125 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:40:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2023-04-01 06:40:57,978 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 87 [2023-04-01 06:40:57,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:40:57,979 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2023-04-01 06:40:57,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 06:40:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2023-04-01 06:40:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 06:40:57,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:40:57,979 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] [2023-04-01 06:40:57,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:40:57,980 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:40:57,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:40:57,980 INFO L85 PathProgramCache]: Analyzing trace with hash -581220228, now seen corresponding path program 1 times [2023-04-01 06:40:57,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:40:57,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446743851] [2023-04-01 06:40:57,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:40:57,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:40:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:07,580 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 06:41:07,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:07,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446743851] [2023-04-01 06:41:07,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446743851] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:07,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:07,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2023-04-01 06:41:07,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76388654] [2023-04-01 06:41:07,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:07,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 06:41:07,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:07,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 06:41:07,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 06:41:07,583 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:18,096 INFO L93 Difference]: Finished difference Result 353 states and 439 transitions. [2023-04-01 06:41:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 06:41:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2023-04-01 06:41:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:18,099 INFO L225 Difference]: With dead ends: 353 [2023-04-01 06:41:18,100 INFO L226 Difference]: Without dead ends: 307 [2023-04-01 06:41:18,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1435, Invalid=4885, Unknown=0, NotChecked=0, Total=6320 [2023-04-01 06:41:18,102 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1485 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:18,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 1310 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 06:41:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-04-01 06:41:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 214. [2023-04-01 06:41:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 210 states have (on average 1.2095238095238094) internal successors, (254), 210 states have internal predecessors, (254), 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 06:41:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 257 transitions. [2023-04-01 06:41:18,136 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 257 transitions. Word has length 88 [2023-04-01 06:41:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:18,136 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 257 transitions. [2023-04-01 06:41:18,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 257 transitions. [2023-04-01 06:41:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 06:41:18,136 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:18,137 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] [2023-04-01 06:41:18,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:41:18,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:18,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1089110750, now seen corresponding path program 1 times [2023-04-01 06:41:18,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:18,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054999782] [2023-04-01 06:41:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:18,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:28,674 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 06:41:28,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:28,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054999782] [2023-04-01 06:41:28,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054999782] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:28,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:28,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2023-04-01 06:41:28,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896225774] [2023-04-01 06:41:28,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:28,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-01 06:41:28,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-01 06:41:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1821, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 06:41:28,677 INFO L87 Difference]: Start difference. First operand 214 states and 257 transitions. Second operand has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 45 states have internal predecessors, (87), 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 06:41:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:45,169 INFO L93 Difference]: Finished difference Result 568 states and 725 transitions. [2023-04-01 06:41:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-01 06:41:45,169 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 45 states have internal predecessors, (87), 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 90 [2023-04-01 06:41:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:45,171 INFO L225 Difference]: With dead ends: 568 [2023-04-01 06:41:45,171 INFO L226 Difference]: Without dead ends: 437 [2023-04-01 06:41:45,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=1713, Invalid=5597, Unknown=0, NotChecked=0, Total=7310 [2023-04-01 06:41:45,173 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1167 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:45,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1167 Valid, 1285 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2492 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 06:41:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-04-01 06:41:45,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 302. [2023-04-01 06:41:45,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 298 states have (on average 1.2416107382550337) internal successors, (370), 298 states have internal predecessors, (370), 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 06:41:45,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 373 transitions. [2023-04-01 06:41:45,235 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 373 transitions. Word has length 90 [2023-04-01 06:41:45,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:45,235 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 373 transitions. [2023-04-01 06:41:45,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 45 states have internal predecessors, (87), 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 06:41:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 373 transitions. [2023-04-01 06:41:45,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 06:41:45,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:45,236 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] [2023-04-01 06:41:45,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:41:45,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:45,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash 847893023, now seen corresponding path program 1 times [2023-04-01 06:41:45,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:45,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354793623] [2023-04-01 06:41:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:45,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:45,283 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 06:41:45,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:45,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354793623] [2023-04-01 06:41:45,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354793623] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:45,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:45,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:45,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83449889] [2023-04-01 06:41:45,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:45,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:45,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:45,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:45,285 INFO L87 Difference]: Start difference. First operand 302 states and 373 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:45,360 INFO L93 Difference]: Finished difference Result 523 states and 665 transitions. [2023-04-01 06:41:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:45,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2023-04-01 06:41:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:45,362 INFO L225 Difference]: With dead ends: 523 [2023-04-01 06:41:45,362 INFO L226 Difference]: Without dead ends: 300 [2023-04-01 06:41:45,363 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 06:41:45,364 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:45,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 255 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:41:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-04-01 06:41:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2023-04-01 06:41:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 296 states have (on average 1.2297297297297298) internal successors, (364), 296 states have internal predecessors, (364), 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 06:41:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 367 transitions. [2023-04-01 06:41:45,422 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 367 transitions. Word has length 90 [2023-04-01 06:41:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:45,422 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 367 transitions. [2023-04-01 06:41:45,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:45,422 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 367 transitions. [2023-04-01 06:41:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 06:41:45,423 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:45,423 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] [2023-04-01 06:41:45,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:41:45,423 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:45,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:45,423 INFO L85 PathProgramCache]: Analyzing trace with hash -599214352, now seen corresponding path program 1 times [2023-04-01 06:41:45,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:45,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895484991] [2023-04-01 06:41:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:45,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:45,593 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 06:41:45,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:45,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895484991] [2023-04-01 06:41:45,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895484991] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:45,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:45,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:41:45,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761276065] [2023-04-01 06:41:45,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:45,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:41:45,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:45,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:41:45,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:41:45,594 INFO L87 Difference]: Start difference. First operand 300 states and 367 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 06:41:45,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:45,741 INFO L93 Difference]: Finished difference Result 353 states and 432 transitions. [2023-04-01 06:41:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:41:45,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 91 [2023-04-01 06:41:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:45,743 INFO L225 Difference]: With dead ends: 353 [2023-04-01 06:41:45,743 INFO L226 Difference]: Without dead ends: 351 [2023-04-01 06:41:45,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:41:45,743 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 108 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:45,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 513 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:41:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-04-01 06:41:45,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 300. [2023-04-01 06:41:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 296 states have (on average 1.222972972972973) internal successors, (362), 296 states have internal predecessors, (362), 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 06:41:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 365 transitions. [2023-04-01 06:41:45,801 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 365 transitions. Word has length 91 [2023-04-01 06:41:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:45,801 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 365 transitions. [2023-04-01 06:41:45,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 06:41:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 365 transitions. [2023-04-01 06:41:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 06:41:45,802 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:45,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:45,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:41:45,802 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:45,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash -313128002, now seen corresponding path program 1 times [2023-04-01 06:41:45,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:45,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917270531] [2023-04-01 06:41:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:45,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:45,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917270531] [2023-04-01 06:41:45,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917270531] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:45,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:45,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:45,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74735810] [2023-04-01 06:41:45,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:45,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:45,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:45,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:45,914 INFO L87 Difference]: Start difference. First operand 300 states and 365 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:46,012 INFO L93 Difference]: Finished difference Result 505 states and 630 transitions. [2023-04-01 06:41:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:46,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2023-04-01 06:41:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:46,013 INFO L225 Difference]: With dead ends: 505 [2023-04-01 06:41:46,014 INFO L226 Difference]: Without dead ends: 375 [2023-04-01 06:41:46,014 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 06:41:46,014 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 52 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:46,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 291 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:41:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-04-01 06:41:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 357. [2023-04-01 06:41:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.226628895184136) internal successors, (433), 353 states have internal predecessors, (433), 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 06:41:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 436 transitions. [2023-04-01 06:41:46,082 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 436 transitions. Word has length 108 [2023-04-01 06:41:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:46,082 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 436 transitions. [2023-04-01 06:41:46,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 436 transitions. [2023-04-01 06:41:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 06:41:46,083 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:46,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:46,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:41:46,083 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:46,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash -125440771, now seen corresponding path program 1 times [2023-04-01 06:41:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:46,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450759231] [2023-04-01 06:41:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:46,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:46,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:46,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450759231] [2023-04-01 06:41:46,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450759231] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:46,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:46,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:46,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089873723] [2023-04-01 06:41:46,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:46,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:46,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:46,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:46,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:46,189 INFO L87 Difference]: Start difference. First operand 357 states and 436 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:46,311 INFO L93 Difference]: Finished difference Result 667 states and 839 transitions. [2023-04-01 06:41:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2023-04-01 06:41:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:46,314 INFO L225 Difference]: With dead ends: 667 [2023-04-01 06:41:46,314 INFO L226 Difference]: Without dead ends: 489 [2023-04-01 06:41:46,314 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 06:41:46,315 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 47 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:46,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 284 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:41:46,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2023-04-01 06:41:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 467. [2023-04-01 06:41:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 463 states have (on average 1.2397408207343412) internal successors, (574), 463 states have internal predecessors, (574), 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 06:41:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 577 transitions. [2023-04-01 06:41:46,404 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 577 transitions. Word has length 111 [2023-04-01 06:41:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:46,404 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 577 transitions. [2023-04-01 06:41:46,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:41:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 577 transitions. [2023-04-01 06:41:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 06:41:46,405 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:46,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:46,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 06:41:46,405 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:46,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:46,406 INFO L85 PathProgramCache]: Analyzing trace with hash -24209882, now seen corresponding path program 1 times [2023-04-01 06:41:46,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:46,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046969833] [2023-04-01 06:41:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:46,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:46,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:46,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046969833] [2023-04-01 06:41:46,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046969833] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:46,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:46,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:46,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433296244] [2023-04-01 06:41:46,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:46,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:46,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:46,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:46,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:46,510 INFO L87 Difference]: Start difference. First operand 467 states and 577 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 06:41:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:46,680 INFO L93 Difference]: Finished difference Result 997 states and 1264 transitions. [2023-04-01 06:41:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:46,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 114 [2023-04-01 06:41:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:46,683 INFO L225 Difference]: With dead ends: 997 [2023-04-01 06:41:46,683 INFO L226 Difference]: Without dead ends: 715 [2023-04-01 06:41:46,683 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 06:41:46,684 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 42 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:46,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 277 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:41:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2023-04-01 06:41:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 685. [2023-04-01 06:41:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 681 states have (on average 1.2525697503671072) internal successors, (853), 681 states have internal predecessors, (853), 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 06:41:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 856 transitions. [2023-04-01 06:41:46,815 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 856 transitions. Word has length 114 [2023-04-01 06:41:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:46,815 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 856 transitions. [2023-04-01 06:41:46,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 06:41:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 856 transitions. [2023-04-01 06:41:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-01 06:41:46,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:46,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:46,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 06:41:46,816 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:46,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1346682246, now seen corresponding path program 1 times [2023-04-01 06:41:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:46,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259658121] [2023-04-01 06:41:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:46,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:46,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:46,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259658121] [2023-04-01 06:41:46,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259658121] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:46,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:46,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:46,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474237318] [2023-04-01 06:41:46,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:46,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:46,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:46,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:46,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:46,930 INFO L87 Difference]: Start difference. First operand 685 states and 856 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 06:41:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:47,182 INFO L93 Difference]: Finished difference Result 1651 states and 2103 transitions. [2023-04-01 06:41:47,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:47,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 117 [2023-04-01 06:41:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:47,185 INFO L225 Difference]: With dead ends: 1651 [2023-04-01 06:41:47,185 INFO L226 Difference]: Without dead ends: 1157 [2023-04-01 06:41:47,186 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 06:41:47,186 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 37 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:47,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 270 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:41:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2023-04-01 06:41:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1111. [2023-04-01 06:41:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1107 states have (on average 1.2610659439927732) internal successors, (1396), 1107 states have internal predecessors, (1396), 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 06:41:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1399 transitions. [2023-04-01 06:41:47,402 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1399 transitions. Word has length 117 [2023-04-01 06:41:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:47,403 INFO L495 AbstractCegarLoop]: Abstraction has 1111 states and 1399 transitions. [2023-04-01 06:41:47,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 06:41:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1399 transitions. [2023-04-01 06:41:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-01 06:41:47,403 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:47,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:41:47,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 06:41:47,404 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:47,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:47,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1286185723, now seen corresponding path program 1 times [2023-04-01 06:41:47,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:47,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789445337] [2023-04-01 06:41:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:47,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:47,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:47,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789445337] [2023-04-01 06:41:47,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789445337] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:47,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:47,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:47,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444289926] [2023-04-01 06:41:47,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:47,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:47,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:47,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:47,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:47,510 INFO L87 Difference]: Start difference. First operand 1111 states and 1399 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 06:41:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:47,923 INFO L93 Difference]: Finished difference Result 2929 states and 3734 transitions. [2023-04-01 06:41:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 120 [2023-04-01 06:41:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:47,928 INFO L225 Difference]: With dead ends: 2929 [2023-04-01 06:41:47,929 INFO L226 Difference]: Without dead ends: 2015 [2023-04-01 06:41:47,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:47,931 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 32 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:47,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 262 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:41:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2023-04-01 06:41:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1937. [2023-04-01 06:41:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1933 states have (on average 1.263838592860838) internal successors, (2443), 1933 states have internal predecessors, (2443), 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 06:41:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2446 transitions. [2023-04-01 06:41:48,335 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2446 transitions. Word has length 120 [2023-04-01 06:41:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:48,335 INFO L495 AbstractCegarLoop]: Abstraction has 1937 states and 2446 transitions. [2023-04-01 06:41:48,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 06:41:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2446 transitions. [2023-04-01 06:41:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 06:41:48,336 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:48,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:48,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 06:41:48,336 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:48,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:48,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1674400679, now seen corresponding path program 1 times [2023-04-01 06:41:48,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:48,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824703264] [2023-04-01 06:41:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:48,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:41:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:41:48,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:41:48,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824703264] [2023-04-01 06:41:48,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824703264] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:41:48,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:41:48,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:41:48,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013398913] [2023-04-01 06:41:48,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:41:48,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:41:48,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:41:48,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:41:48,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:41:48,452 INFO L87 Difference]: Start difference. First operand 1937 states and 2446 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 06:41:49,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:41:49,238 INFO L93 Difference]: Finished difference Result 5566 states and 7085 transitions. [2023-04-01 06:41:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:41:49,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-01 06:41:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:41:49,248 INFO L225 Difference]: With dead ends: 5566 [2023-04-01 06:41:49,248 INFO L226 Difference]: Without dead ends: 3745 [2023-04-01 06:41:49,251 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 06:41:49,251 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 27 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:41:49,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 252 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:41:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2023-04-01 06:41:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3599. [2023-04-01 06:41:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3599 states, 3595 states have (on average 1.262586926286509) internal successors, (4539), 3595 states have internal predecessors, (4539), 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 06:41:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 4542 transitions. [2023-04-01 06:41:50,079 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 4542 transitions. Word has length 125 [2023-04-01 06:41:50,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:41:50,079 INFO L495 AbstractCegarLoop]: Abstraction has 3599 states and 4542 transitions. [2023-04-01 06:41:50,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 06:41:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 4542 transitions. [2023-04-01 06:41:50,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 06:41:50,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:41:50,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:50,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 06:41:50,081 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:41:50,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:41:50,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2131727988, now seen corresponding path program 1 times [2023-04-01 06:41:50,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:41:50,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373248288] [2023-04-01 06:41:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:41:50,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:41:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat