/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.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:11:37,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:11:37,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:11:37,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 03:11:37,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 03:11:37,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 03:11:37,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 03:11:37,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 03:11:37,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 03:11:37,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 03:11:37,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 03:11:37,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 03:11:37,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:11:37,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:11:37,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:11:37,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:11:37,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:11:37,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:11:37,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:11:37,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:11:37,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:11:37,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:11:37,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:11:37,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:11:37,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:11:37,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:11:37,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:11:37,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:11:37,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:11:37,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 03:11:37,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 03:11:37,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 03:11:37,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 03:11:37,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 03:11:37,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 03:11:37,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 03:11:37,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 03:11:37,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 03:11:37,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:11:37,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:11:37,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:11:37,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 03:11:37,634 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:11:37,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:11:37,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:11:37,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:11:37,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:11:37,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:11:37,636 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:11:37,636 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:11:37,636 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:11:37,636 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:11:37,637 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:11:37,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:11:37,637 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:11:37,637 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:11:37,637 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:11:37,637 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:11:37,637 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:11:37,638 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:11:37,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:11:37,638 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:11:37,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:11:37,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:11:37,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:11:37,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:11:37,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:11:37,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:11:37,639 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:11:37,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:11:37,640 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:11:37,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:11:37,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:11:37,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:11:37,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:11:37,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:11:37,644 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:11:37,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:11:37,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:11:37,645 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:11:37,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:11:37,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:11:37,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:11:37,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:11:37,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:11:37,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:11:37,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:11:37,893 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:11:37,894 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:11:37,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-03 03:11:38,971 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:11:39,217 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:11:39,218 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-03 03:11:39,235 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193de3fb8/ee60014bf80b4265bee0a261d01e320c/FLAGc9cd72e1d [2023-04-03 03:11:39,255 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/193de3fb8/ee60014bf80b4265bee0a261d01e320c [2023-04-03 03:11:39,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:11:39,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:11:39,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:11:39,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:11:39,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:11:39,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f2cc37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39, skipping insertion in model container [2023-04-03 03:11:39,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:11:39,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:11:39,525 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.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[9243,9256] [2023-04-03 03:11:39,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:11:39,598 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:11:39,651 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.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[9243,9256] [2023-04-03 03:11:39,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:11:39,695 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:11:39,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39 WrapperNode [2023-04-03 03:11:39,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:11:39,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:11:39,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:11:39,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:11:39,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:11:39,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:11:39,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:11:39,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:11:39,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39" (1/1) ... [2023-04-03 03:11:39,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:11:39,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:11:39,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 03:11:39,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 03:11:39,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:11:39,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:11:39,852 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:11:39,852 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:11:39,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:11:39,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:11:39,853 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:11:39,853 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:11:39,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:11:39,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:11:39,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:11:39,853 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:11:39,855 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:11:39,855 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:11:39,855 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:11:39,855 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:11:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:11:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:11:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 03:11:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 03:11:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 03:11:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:11:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:11:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:11:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:11:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:11:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:11:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:11:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:11:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:11:39,999 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:11:40,000 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:11:40,556 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:11:40,691 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:11:40,691 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:11:40,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:11:40 BoogieIcfgContainer [2023-04-03 03:11:40,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:11:40,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:11:40,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:11:40,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:11:40,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:11:39" (1/3) ... [2023-04-03 03:11:40,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a56ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:11:40, skipping insertion in model container [2023-04-03 03:11:40,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:11:39" (2/3) ... [2023-04-03 03:11:40,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a56ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:11:40, skipping insertion in model container [2023-04-03 03:11:40,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:11:40" (3/3) ... [2023-04-03 03:11:40,703 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-03 03:11:40,719 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:11:40,719 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:11:40,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:11:40,778 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;@7282a23a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:11:40,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:11:40,783 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) [2023-04-03 03:11:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-03 03:11:40,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:11:40,792 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] [2023-04-03 03:11:40,793 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:11:40,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:11:40,802 INFO L85 PathProgramCache]: Analyzing trace with hash -353465809, now seen corresponding path program 1 times [2023-04-03 03:11:40,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:11:40,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147660823] [2023-04-03 03:11:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:11:40,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:11:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:11:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:11:41,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:11:41,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147660823] [2023-04-03 03:11:41,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147660823] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:11:41,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:11:41,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:11:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480552498] [2023-04-03 03:11:41,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:11:41,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:11:41,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:11:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:11:41,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:11:41,513 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) [2023-04-03 03:11:41,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:11:41,748 INFO L93 Difference]: Finished difference Result 206 states and 332 transitions. [2023-04-03 03:11:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:11:41,750 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 [2023-04-03 03:11:41,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:11:41,760 INFO L225 Difference]: With dead ends: 206 [2023-04-03 03:11:41,760 INFO L226 Difference]: Without dead ends: 129 [2023-04-03 03:11:41,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:11:41,769 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 [2023-04-03 03:11:41,770 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] [2023-04-03 03:11:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-03 03:11:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-03 03:11:41,824 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) [2023-04-03 03:11:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2023-04-03 03:11:41,831 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 82 [2023-04-03 03:11:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:11:41,832 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2023-04-03 03:11:41,833 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) [2023-04-03 03:11:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2023-04-03 03:11:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 03:11:41,836 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:11:41,837 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] [2023-04-03 03:11:41,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:11:41,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:11:41,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:11:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2109941317, now seen corresponding path program 1 times [2023-04-03 03:11:41,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:11:41,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226407177] [2023-04-03 03:11:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:11:41,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:11:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:11:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:11:42,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:11:42,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226407177] [2023-04-03 03:11:42,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226407177] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:11:42,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:11:42,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:11:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570141133] [2023-04-03 03:11:42,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:11:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:11:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:11:42,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:11:42,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:11:42,106 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) [2023-04-03 03:11:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:11:42,234 INFO L93 Difference]: Finished difference Result 204 states and 252 transitions. [2023-04-03 03:11:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:11:42,236 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 [2023-04-03 03:11:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:11:42,244 INFO L225 Difference]: With dead ends: 204 [2023-04-03 03:11:42,244 INFO L226 Difference]: Without dead ends: 129 [2023-04-03 03:11:42,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:11:42,245 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 [2023-04-03 03:11:42,246 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] [2023-04-03 03:11:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-03 03:11:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-03 03:11:42,260 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) [2023-04-03 03:11:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2023-04-03 03:11:42,261 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 83 [2023-04-03 03:11:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:11:42,262 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2023-04-03 03:11:42,262 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) [2023-04-03 03:11:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2023-04-03 03:11:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-03 03:11:42,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:11:42,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:11:42,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:11:42,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:11:42,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:11:42,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1567844527, now seen corresponding path program 1 times [2023-04-03 03:11:42,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:11:42,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005404475] [2023-04-03 03:11:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:11:42,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:11:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:11:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:11:42,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:11:42,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005404475] [2023-04-03 03:11:42,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005404475] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:11:42,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:11:42,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:11:42,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74867137] [2023-04-03 03:11:42,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:11:42,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:11:42,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:11:42,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:11:42,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:11:42,475 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) [2023-04-03 03:11:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:11:42,595 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2023-04-03 03:11:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:11:42,595 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 [2023-04-03 03:11:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:11:42,598 INFO L225 Difference]: With dead ends: 200 [2023-04-03 03:11:42,598 INFO L226 Difference]: Without dead ends: 129 [2023-04-03 03:11:42,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:11:42,600 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 [2023-04-03 03:11:42,601 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] [2023-04-03 03:11:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-03 03:11:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-03 03:11:42,613 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) [2023-04-03 03:11:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2023-04-03 03:11:42,613 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 84 [2023-04-03 03:11:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:11:42,614 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2023-04-03 03:11:42,614 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) [2023-04-03 03:11:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2023-04-03 03:11:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 03:11:42,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:11:42,615 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] [2023-04-03 03:11:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:11:42,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:11:42,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:11:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash 995509558, now seen corresponding path program 1 times [2023-04-03 03:11:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:11:42,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948791588] [2023-04-03 03:11:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:11:42,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:11:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:11:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:11:42,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:11:42,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948791588] [2023-04-03 03:11:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948791588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:11:42,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:11:42,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:11:42,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380780470] [2023-04-03 03:11:42,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:11:42,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:11:42,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:11:42,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:11:42,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:11:42,747 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) [2023-04-03 03:11:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:11:42,854 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2023-04-03 03:11:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:11:42,854 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 [2023-04-03 03:11:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:11:42,855 INFO L225 Difference]: With dead ends: 196 [2023-04-03 03:11:42,855 INFO L226 Difference]: Without dead ends: 129 [2023-04-03 03:11:42,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:11:42,869 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 [2023-04-03 03:11:42,870 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] [2023-04-03 03:11:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-03 03:11:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-03 03:11:42,885 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) [2023-04-03 03:11:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2023-04-03 03:11:42,886 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 85 [2023-04-03 03:11:42,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:11:42,886 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2023-04-03 03:11:42,886 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) [2023-04-03 03:11:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2023-04-03 03:11:42,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 03:11:42,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:11:42,887 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] [2023-04-03 03:11:42,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:11:42,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:11:42,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:11:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash -742015490, now seen corresponding path program 1 times [2023-04-03 03:11:42,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:11:42,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766364766] [2023-04-03 03:11:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:11:42,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:11:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:11:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:11:43,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:11:43,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766364766] [2023-04-03 03:11:43,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766364766] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:11:43,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:11:43,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:11:43,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106139573] [2023-04-03 03:11:43,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:11:43,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:11:43,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:11:43,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:11:43,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:11:43,041 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) [2023-04-03 03:11:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:11:43,161 INFO L93 Difference]: Finished difference Result 192 states and 228 transitions. [2023-04-03 03:11:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:11:43,162 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 [2023-04-03 03:11:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:11:43,163 INFO L225 Difference]: With dead ends: 192 [2023-04-03 03:11:43,163 INFO L226 Difference]: Without dead ends: 129 [2023-04-03 03:11:43,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:11:43,164 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 [2023-04-03 03:11:43,164 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] [2023-04-03 03:11:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-03 03:11:43,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-03 03:11:43,182 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) [2023-04-03 03:11:43,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2023-04-03 03:11:43,183 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 86 [2023-04-03 03:11:43,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:11:43,185 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2023-04-03 03:11:43,185 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) [2023-04-03 03:11:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2023-04-03 03:11:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 03:11:43,190 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:11:43,190 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] [2023-04-03 03:11:43,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:11:43,190 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:11:43,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:11:43,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2034730919, now seen corresponding path program 1 times [2023-04-03 03:11:43,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:11:43,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046519557] [2023-04-03 03:11:43,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:11:43,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:11:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:11:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:11:43,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:11:43,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046519557] [2023-04-03 03:11:43,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046519557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:11:43,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:11:43,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:11:43,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438843307] [2023-04-03 03:11:43,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:11:43,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:11:43,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:11:43,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:11:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:11:43,341 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) [2023-04-03 03:11:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:11:43,460 INFO L93 Difference]: Finished difference Result 208 states and 241 transitions. [2023-04-03 03:11:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:11:43,460 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 [2023-04-03 03:11:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:11:43,461 INFO L225 Difference]: With dead ends: 208 [2023-04-03 03:11:43,461 INFO L226 Difference]: Without dead ends: 129 [2023-04-03 03:11:43,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:11:43,462 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 305 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:11:43,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 116 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:11:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-03 03:11:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-03 03:11:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.136) internal successors, (142), 125 states have internal predecessors, (142), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:11:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2023-04-03 03:11:43,479 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 87 [2023-04-03 03:11:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:11:43,479 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2023-04-03 03:11:43,479 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) [2023-04-03 03:11:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2023-04-03 03:11:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 03:11:43,480 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:11:43,480 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] [2023-04-03 03:11:43,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:11:43,481 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:11:43,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:11:43,481 INFO L85 PathProgramCache]: Analyzing trace with hash 742891618, now seen corresponding path program 1 times [2023-04-03 03:11:43,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:11:43,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814317384] [2023-04-03 03:11:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:11:43,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:11:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:11:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:11:55,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:11:55,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814317384] [2023-04-03 03:11:55,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814317384] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:11:55,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:11:55,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2023-04-03 03:11:55,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112372800] [2023-04-03 03:11:55,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:11:55,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-04-03 03:11:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:11:55,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-04-03 03:11:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2023-04-03 03:11:55,522 INFO L87 Difference]: Start difference. First operand 129 states and 145 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 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) [2023-04-03 03:12:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:14,394 INFO L93 Difference]: Finished difference Result 307 states and 383 transitions. [2023-04-03 03:12:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-04-03 03:12:14,395 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 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 [2023-04-03 03:12:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:14,397 INFO L225 Difference]: With dead ends: 307 [2023-04-03 03:12:14,397 INFO L226 Difference]: Without dead ends: 261 [2023-04-03 03:12:14,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=1655, Invalid=5655, Unknown=0, NotChecked=0, Total=7310 [2023-04-03 03:12:14,401 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1387 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 3278 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 3343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:12:14,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1387 Valid, 1698 Invalid, 3343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3278 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-03 03:12:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-04-03 03:12:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2023-04-03 03:12:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.1867469879518073) internal successors, (197), 166 states have internal predecessors, (197), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 200 transitions. [2023-04-03 03:12:14,438 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 200 transitions. Word has length 88 [2023-04-03 03:12:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:14,438 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 200 transitions. [2023-04-03 03:12:14,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 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) [2023-04-03 03:12:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 200 transitions. [2023-04-03 03:12:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 03:12:14,439 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:14,439 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] [2023-04-03 03:12:14,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:12:14,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:14,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2044692156, now seen corresponding path program 1 times [2023-04-03 03:12:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:14,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347826513] [2023-04-03 03:12:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:12:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:12:26,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:12:26,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347826513] [2023-04-03 03:12:26,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347826513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:12:26,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:12:26,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2023-04-03 03:12:26,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669839210] [2023-04-03 03:12:26,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:12:26,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-03 03:12:26,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:12:26,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-03 03:12:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2023-04-03 03:12:26,629 INFO L87 Difference]: Start difference. First operand 170 states and 200 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) [2023-04-03 03:12:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:43,657 INFO L93 Difference]: Finished difference Result 436 states and 556 transitions. [2023-04-03 03:12:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-03 03:12:43,658 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 [2023-04-03 03:12:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:43,659 INFO L225 Difference]: With dead ends: 436 [2023-04-03 03:12:43,660 INFO L226 Difference]: Without dead ends: 349 [2023-04-03 03:12:43,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=1837, Invalid=6173, Unknown=0, NotChecked=0, Total=8010 [2023-04-03 03:12:43,662 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1402 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 3358 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 3414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:12:43,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1402 Valid, 1680 Invalid, 3414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3358 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-03 03:12:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-04-03 03:12:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 214. [2023-04-03 03:12:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 210 states have (on average 1.2190476190476192) internal successors, (256), 210 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 259 transitions. [2023-04-03 03:12:43,712 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 259 transitions. Word has length 90 [2023-04-03 03:12:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:43,713 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 259 transitions. [2023-04-03 03:12:43,713 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) [2023-04-03 03:12:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 259 transitions. [2023-04-03 03:12:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 03:12:43,714 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:43,714 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] [2023-04-03 03:12:43,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:12:43,714 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:43,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:43,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2009057413, now seen corresponding path program 1 times [2023-04-03 03:12:43,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:43,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246488240] [2023-04-03 03:12:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:43,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:12:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:12:43,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:12:43,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246488240] [2023-04-03 03:12:43,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246488240] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:12:43,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:12:43,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:12:43,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663404956] [2023-04-03 03:12:43,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:12:43,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:12:43,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:12:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:12:43,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:43,783 INFO L87 Difference]: Start difference. First operand 214 states and 259 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) [2023-04-03 03:12:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:43,866 INFO L93 Difference]: Finished difference Result 346 states and 436 transitions. [2023-04-03 03:12:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:12:43,866 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 [2023-04-03 03:12:43,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:43,868 INFO L225 Difference]: With dead ends: 346 [2023-04-03 03:12:43,868 INFO L226 Difference]: Without dead ends: 213 [2023-04-03 03:12:43,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:43,869 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 257 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 [2023-04-03 03:12:43,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 257 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:12:43,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-04-03 03:12:43,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-04-03 03:12:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 209 states have (on average 1.2105263157894737) internal successors, (253), 209 states have internal predecessors, (253), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 256 transitions. [2023-04-03 03:12:43,929 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 256 transitions. Word has length 90 [2023-04-03 03:12:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:43,929 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 256 transitions. [2023-04-03 03:12:43,929 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) [2023-04-03 03:12:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 256 transitions. [2023-04-03 03:12:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-03 03:12:43,930 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:43,930 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] [2023-04-03 03:12:43,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:12:43,930 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:43,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1037143370, now seen corresponding path program 1 times [2023-04-03 03:12:43,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:43,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002766539] [2023-04-03 03:12:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:43,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:12:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:12:44,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:12:44,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002766539] [2023-04-03 03:12:44,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002766539] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:12:44,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:12:44,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:12:44,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285041391] [2023-04-03 03:12:44,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:12:44,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:12:44,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:12:44,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:12:44,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:12:44,162 INFO L87 Difference]: Start difference. First operand 213 states and 256 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) [2023-04-03 03:12:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:44,288 INFO L93 Difference]: Finished difference Result 258 states and 312 transitions. [2023-04-03 03:12:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 03:12:44,289 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 [2023-04-03 03:12:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:44,290 INFO L225 Difference]: With dead ends: 258 [2023-04-03 03:12:44,290 INFO L226 Difference]: Without dead ends: 256 [2023-04-03 03:12:44,290 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 [2023-04-03 03:12:44,291 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 110 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:12:44,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 517 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:12:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-04-03 03:12:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 213. [2023-04-03 03:12:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 209 states have (on average 1.2057416267942584) internal successors, (252), 209 states have internal predecessors, (252), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 255 transitions. [2023-04-03 03:12:44,355 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 255 transitions. Word has length 91 [2023-04-03 03:12:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:44,355 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 255 transitions. [2023-04-03 03:12:44,355 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) [2023-04-03 03:12:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 255 transitions. [2023-04-03 03:12:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-03 03:12:44,356 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:44,356 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] [2023-04-03 03:12:44,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 03:12:44,357 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:44,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:44,357 INFO L85 PathProgramCache]: Analyzing trace with hash 602399850, now seen corresponding path program 1 times [2023-04-03 03:12:44,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:44,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103519878] [2023-04-03 03:12:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:44,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:12:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:12:44,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:12:44,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103519878] [2023-04-03 03:12:44,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103519878] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:12:44,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:12:44,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:12:44,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162665079] [2023-04-03 03:12:44,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:12:44,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:12:44,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:12:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:12:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:44,501 INFO L87 Difference]: Start difference. First operand 213 states and 255 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) [2023-04-03 03:12:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:44,605 INFO L93 Difference]: Finished difference Result 409 states and 515 transitions. [2023-04-03 03:12:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:12:44,606 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 [2023-04-03 03:12:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:44,608 INFO L225 Difference]: With dead ends: 409 [2023-04-03 03:12:44,608 INFO L226 Difference]: Without dead ends: 279 [2023-04-03 03:12:44,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:44,609 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 53 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 293 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 [2023-04-03 03:12:44,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 293 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:12:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-04-03 03:12:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 265. [2023-04-03 03:12:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 261 states have (on average 1.2183908045977012) internal successors, (318), 261 states have internal predecessors, (318), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 321 transitions. [2023-04-03 03:12:44,695 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 321 transitions. Word has length 108 [2023-04-03 03:12:44,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:44,695 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 321 transitions. [2023-04-03 03:12:44,695 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) [2023-04-03 03:12:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 321 transitions. [2023-04-03 03:12:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 03:12:44,696 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:44,696 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] [2023-04-03 03:12:44,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:12:44,696 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:44,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:44,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1268122146, now seen corresponding path program 1 times [2023-04-03 03:12:44,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:44,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827166567] [2023-04-03 03:12:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:44,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:12:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:12:44,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:12:44,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827166567] [2023-04-03 03:12:44,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827166567] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:12:44,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:12:44,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:12:44,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553939384] [2023-04-03 03:12:44,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:12:44,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:12:44,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:12:44,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:12:44,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:44,862 INFO L87 Difference]: Start difference. First operand 265 states and 321 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) [2023-04-03 03:12:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:44,994 INFO L93 Difference]: Finished difference Result 565 states and 717 transitions. [2023-04-03 03:12:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:12:44,995 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 [2023-04-03 03:12:44,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:44,997 INFO L225 Difference]: With dead ends: 565 [2023-04-03 03:12:44,997 INFO L226 Difference]: Without dead ends: 387 [2023-04-03 03:12:44,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:44,998 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 48 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 286 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 [2023-04-03 03:12:44,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 286 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:12:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-04-03 03:12:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 369. [2023-04-03 03:12:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 365 states have (on average 1.2465753424657535) internal successors, (455), 365 states have internal predecessors, (455), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 458 transitions. [2023-04-03 03:12:45,100 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 458 transitions. Word has length 111 [2023-04-03 03:12:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:45,100 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 458 transitions. [2023-04-03 03:12:45,100 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) [2023-04-03 03:12:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 458 transitions. [2023-04-03 03:12:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-03 03:12:45,101 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:45,101 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] [2023-04-03 03:12:45,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 03:12:45,102 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:45,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1507823571, now seen corresponding path program 1 times [2023-04-03 03:12:45,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:45,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817641268] [2023-04-03 03:12:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:45,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:12:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:12:45,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:12:45,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817641268] [2023-04-03 03:12:45,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817641268] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:12:45,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:12:45,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:12:45,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791363672] [2023-04-03 03:12:45,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:12:45,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:12:45,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:12:45,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:12:45,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:45,253 INFO L87 Difference]: Start difference. First operand 369 states and 458 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) [2023-04-03 03:12:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:45,440 INFO L93 Difference]: Finished difference Result 889 states and 1144 transitions. [2023-04-03 03:12:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:12:45,440 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 [2023-04-03 03:12:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:45,443 INFO L225 Difference]: With dead ends: 889 [2023-04-03 03:12:45,443 INFO L226 Difference]: Without dead ends: 607 [2023-04-03 03:12:45,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:45,445 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 43 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 279 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 [2023-04-03 03:12:45,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 279 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:12:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2023-04-03 03:12:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 581. [2023-04-03 03:12:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 577 states have (on average 1.2703639514731369) internal successors, (733), 577 states have internal predecessors, (733), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 736 transitions. [2023-04-03 03:12:45,604 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 736 transitions. Word has length 114 [2023-04-03 03:12:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:45,604 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 736 transitions. [2023-04-03 03:12:45,604 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) [2023-04-03 03:12:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 736 transitions. [2023-04-03 03:12:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-03 03:12:45,605 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:45,605 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] [2023-04-03 03:12:45,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 03:12:45,605 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:45,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:45,606 INFO L85 PathProgramCache]: Analyzing trace with hash 104907238, now seen corresponding path program 1 times [2023-04-03 03:12:45,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:45,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430716210] [2023-04-03 03:12:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:45,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:12:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:12:45,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:12:45,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430716210] [2023-04-03 03:12:45,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430716210] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:12:45,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:12:45,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:12:45,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576822307] [2023-04-03 03:12:45,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:12:45,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:12:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:12:45,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:12:45,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:45,750 INFO L87 Difference]: Start difference. First operand 581 states and 736 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) [2023-04-03 03:12:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:46,062 INFO L93 Difference]: Finished difference Result 1537 states and 1994 transitions. [2023-04-03 03:12:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:12:46,063 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 [2023-04-03 03:12:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:46,067 INFO L225 Difference]: With dead ends: 1537 [2023-04-03 03:12:46,067 INFO L226 Difference]: Without dead ends: 1043 [2023-04-03 03:12:46,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:46,069 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 38 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 272 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 [2023-04-03 03:12:46,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 272 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:12:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2023-04-03 03:12:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1001. [2023-04-03 03:12:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 997 states have (on average 1.2848545636910733) internal successors, (1281), 997 states have internal predecessors, (1281), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1284 transitions. [2023-04-03 03:12:46,358 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1284 transitions. Word has length 117 [2023-04-03 03:12:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:46,358 INFO L495 AbstractCegarLoop]: Abstraction has 1001 states and 1284 transitions. [2023-04-03 03:12:46,358 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) [2023-04-03 03:12:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1284 transitions. [2023-04-03 03:12:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-03 03:12:46,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:46,359 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] [2023-04-03 03:12:46,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 03:12:46,359 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:46,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1887179520, now seen corresponding path program 1 times [2023-04-03 03:12:46,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:46,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900393388] [2023-04-03 03:12:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:46,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:12:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:12:46,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:12:46,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900393388] [2023-04-03 03:12:46,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900393388] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:12:46,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:12:46,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:12:46,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078099197] [2023-04-03 03:12:46,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:12:46,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:12:46,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:12:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:12:46,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:46,501 INFO L87 Difference]: Start difference. First operand 1001 states and 1284 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) [2023-04-03 03:12:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:47,082 INFO L93 Difference]: Finished difference Result 2809 states and 3654 transitions. [2023-04-03 03:12:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:12:47,083 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 [2023-04-03 03:12:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:47,089 INFO L225 Difference]: With dead ends: 2809 [2023-04-03 03:12:47,090 INFO L226 Difference]: Without dead ends: 1895 [2023-04-03 03:12:47,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:47,093 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 33 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 265 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 [2023-04-03 03:12:47,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 265 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:12:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2023-04-03 03:12:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1821. [2023-04-03 03:12:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1817 states have (on average 1.290588882773803) internal successors, (2345), 1817 states have internal predecessors, (2345), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2348 transitions. [2023-04-03 03:12:47,547 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2348 transitions. Word has length 120 [2023-04-03 03:12:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:47,547 INFO L495 AbstractCegarLoop]: Abstraction has 1821 states and 2348 transitions. [2023-04-03 03:12:47,548 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) [2023-04-03 03:12:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2348 transitions. [2023-04-03 03:12:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-03 03:12:47,549 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:47,549 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, 1, 1, 1] [2023-04-03 03:12:47,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 03:12:47,549 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:47,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash -462972392, now seen corresponding path program 1 times [2023-04-03 03:12:47,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:47,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598582235] [2023-04-03 03:12:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:47,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:12:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:12:47,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:12:47,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598582235] [2023-04-03 03:12:47,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598582235] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:12:47,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:12:47,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:12:47,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786134986] [2023-04-03 03:12:47,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:12:47,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:12:47,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:12:47,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:12:47,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:47,691 INFO L87 Difference]: Start difference. First operand 1821 states and 2348 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:48,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:48,646 INFO L93 Difference]: Finished difference Result 5281 states and 6862 transitions. [2023-04-03 03:12:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:12:48,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 123 [2023-04-03 03:12:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:48,659 INFO L225 Difference]: With dead ends: 5281 [2023-04-03 03:12:48,659 INFO L226 Difference]: Without dead ends: 3547 [2023-04-03 03:12:48,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:12:48,663 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 28 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 254 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 [2023-04-03 03:12:48,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 254 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:12:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2023-04-03 03:12:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3409. [2023-04-03 03:12:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 3405 states have (on average 1.2901615271659324) internal successors, (4393), 3405 states have internal predecessors, (4393), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 4396 transitions. [2023-04-03 03:12:49,442 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 4396 transitions. Word has length 123 [2023-04-03 03:12:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:49,442 INFO L495 AbstractCegarLoop]: Abstraction has 3409 states and 4396 transitions. [2023-04-03 03:12:49,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 4396 transitions. [2023-04-03 03:12:49,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-03 03:12:49,444 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:49,444 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] [2023-04-03 03:12:49,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 03:12:49,445 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:49,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:49,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1809776749, now seen corresponding path program 1 times [2023-04-03 03:12:49,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:49,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678551559] [2023-04-03 03:12:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:49,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:12:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-03 03:12:49,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:12:49,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678551559] [2023-04-03 03:12:49,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678551559] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:12:49,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:12:49,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 03:12:49,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092086045] [2023-04-03 03:12:49,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:12:49,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 03:12:49,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:12:49,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 03:12:49,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-03 03:12:49,980 INFO L87 Difference]: Start difference. First operand 3409 states and 4396 transitions. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 10 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:12:51,672 INFO L93 Difference]: Finished difference Result 8842 states and 11515 transitions. [2023-04-03 03:12:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 03:12:51,673 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 10 states have internal predecessors, (135), 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 146 [2023-04-03 03:12:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:12:51,723 INFO L225 Difference]: With dead ends: 8842 [2023-04-03 03:12:51,723 INFO L226 Difference]: Without dead ends: 5520 [2023-04-03 03:12:51,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2023-04-03 03:12:51,741 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 550 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:12:51,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 345 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:12:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5520 states. [2023-04-03 03:12:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5520 to 5518. [2023-04-03 03:12:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5518 states, 5514 states have (on average 1.2887196227783824) internal successors, (7106), 5514 states have internal predecessors, (7106), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 7109 transitions. [2023-04-03 03:12:53,462 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 7109 transitions. Word has length 146 [2023-04-03 03:12:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:12:53,462 INFO L495 AbstractCegarLoop]: Abstraction has 5518 states and 7109 transitions. [2023-04-03 03:12:53,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 10 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:12:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 7109 transitions. [2023-04-03 03:12:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-03 03:12:53,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:12:53,464 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] [2023-04-03 03:12:53,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 03:12:53,465 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:12:53,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:12:53,465 INFO L85 PathProgramCache]: Analyzing trace with hash 630351288, now seen corresponding path program 1 times [2023-04-03 03:12:53,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:12:53,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293580636] [2023-04-03 03:12:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:12:53,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:12:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:14:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:14:02,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:14:02,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293580636] [2023-04-03 03:14:02,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293580636] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:14:02,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082173514] [2023-04-03 03:14:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:14:02,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:14:02,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:14:02,176 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 03:14:02,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 03:14:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:14:02,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 163 conjunts are in the unsatisfiable core [2023-04-03 03:14:02,660 INFO L285 TraceCheckSpWp]: Computing forward predicates...