/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:49:40,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:49:40,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:49:40,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:49:40,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:49:40,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:49:40,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:49:40,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:49:40,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:49:40,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:49:40,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:49:40,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:49:40,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:49:40,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:49:40,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:49:40,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:49:40,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:49:40,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:49:40,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:49:40,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:49:40,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:49:40,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:49:40,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:49:40,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:49:40,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:49:40,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:49:40,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:49:40,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:49:40,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:49:40,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:49:40,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:49:40,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:49:40,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:49:40,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:49:40,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:49:40,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:49:40,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:49:40,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:49:40,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:49:40,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:49:40,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:49:40,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:49:40,650 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:49:40,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:49:40,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:49:40,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:49:40,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:49:40,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:49:40,652 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:49:40,652 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:49:40,652 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:49:40,652 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:49:40,652 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:49:40,653 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:49:40,653 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:49:40,653 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:49:40,653 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:49:40,653 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:49:40,653 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:49:40,653 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:49:40,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:49:40,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:49:40,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:49:40,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:49:40,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:49:40,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:49:40,655 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:49:40,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:49:40,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:49:40,655 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:49:40,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:49:40,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:49:40,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:49:40,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:49:40,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:49:40,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:49:40,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:49:40,871 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:49:40,872 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:49:40,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:49:42,002 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:49:42,205 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:49:42,205 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:49:42,212 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bee7ef271/4e54b325ee024208a97839b8eeba5ea1/FLAGbf0860542 [2023-04-01 12:49:42,226 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bee7ef271/4e54b325ee024208a97839b8eeba5ea1 [2023-04-01 12:49:42,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:49:42,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:49:42,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:49:42,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:49:42,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:49:42,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4282e5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42, skipping insertion in model container [2023-04-01 12:49:42,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:49:42,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:49:42,425 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_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-01 12:49:42,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:49:42,486 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:49:42,519 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_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-01 12:49:42,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:49:42,554 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:49:42,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42 WrapperNode [2023-04-01 12:49:42,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:49:42,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:49:42,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:49:42,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:49:42,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,624 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:49:42,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:49:42,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:49:42,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:49:42,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42" (1/1) ... [2023-04-01 12:49:42,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:49:42,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:49:42,667 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:49:42,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:49:42,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:49:42,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:49:42,696 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:49:42,696 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:49:42,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:49:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:49:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:49:42,697 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:49:42,698 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:49:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:49:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:49:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:49:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:49:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:49:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:49:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:49:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:49:42,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:49:42,810 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:49:42,811 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:49:43,366 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:49:43,533 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:49:43,533 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:49:43,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:49:43 BoogieIcfgContainer [2023-04-01 12:49:43,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:49:43,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:49:43,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:49:43,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:49:43,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:49:42" (1/3) ... [2023-04-01 12:49:43,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee55c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:49:43, skipping insertion in model container [2023-04-01 12:49:43,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:49:42" (2/3) ... [2023-04-01 12:49:43,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee55c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:49:43, skipping insertion in model container [2023-04-01 12:49:43,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:49:43" (3/3) ... [2023-04-01 12:49:43,542 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:49:43,555 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:49:43,556 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:49:43,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:49:43,603 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;@7203ded0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:49:43,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:49:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 98 states have (on average 1.7551020408163265) internal successors, (172), 105 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:49:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 12:49:43,613 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:43,614 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] [2023-04-01 12:49:43,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:43,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:43,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1843659318, now seen corresponding path program 1 times [2023-04-01 12:49:43,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:43,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573337334] [2023-04-01 12:49:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:43,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:43,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573337334] [2023-04-01 12:49:43,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573337334] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:43,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:43,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:43,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530553654] [2023-04-01 12:49:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:43,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:43,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:43,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:43,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:43,960 INFO L87 Difference]: Start difference. First operand has 110 states, 98 states have (on average 1.7551020408163265) internal successors, (172), 105 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:44,077 INFO L93 Difference]: Finished difference Result 244 states and 371 transitions. [2023-04-01 12:49:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:44,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 47 [2023-04-01 12:49:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:44,089 INFO L225 Difference]: With dead ends: 244 [2023-04-01 12:49:44,090 INFO L226 Difference]: Without dead ends: 150 [2023-04-01 12:49:44,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:44,096 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 113 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:44,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 376 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:49:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-04-01 12:49:44,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2023-04-01 12:49:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.4305555555555556) internal successors, (206), 144 states have internal predecessors, (206), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2023-04-01 12:49:44,165 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 47 [2023-04-01 12:49:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:44,166 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2023-04-01 12:49:44,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2023-04-01 12:49:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 12:49:44,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:44,168 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] [2023-04-01 12:49:44,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:49:44,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:44,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:44,169 INFO L85 PathProgramCache]: Analyzing trace with hash 448384753, now seen corresponding path program 1 times [2023-04-01 12:49:44,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:44,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761488146] [2023-04-01 12:49:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:44,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:44,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:44,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761488146] [2023-04-01 12:49:44,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761488146] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:44,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:44,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:44,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140054438] [2023-04-01 12:49:44,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:44,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:44,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:44,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:44,367 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:44,451 INFO L93 Difference]: Finished difference Result 325 states and 482 transitions. [2023-04-01 12:49:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:44,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 49 [2023-04-01 12:49:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:44,459 INFO L225 Difference]: With dead ends: 325 [2023-04-01 12:49:44,462 INFO L226 Difference]: Without dead ends: 213 [2023-04-01 12:49:44,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:44,463 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 93 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:44,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 219 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-04-01 12:49:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2023-04-01 12:49:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 207 states have (on average 1.4541062801932367) internal successors, (301), 207 states have internal predecessors, (301), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 304 transitions. [2023-04-01 12:49:44,483 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 304 transitions. Word has length 49 [2023-04-01 12:49:44,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:44,483 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 304 transitions. [2023-04-01 12:49:44,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,484 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 304 transitions. [2023-04-01 12:49:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:49:44,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:44,489 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] [2023-04-01 12:49:44,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:49:44,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:44,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:44,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1705082450, now seen corresponding path program 1 times [2023-04-01 12:49:44,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:44,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131210077] [2023-04-01 12:49:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:44,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:44,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:44,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131210077] [2023-04-01 12:49:44,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131210077] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:44,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:44,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:44,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336540014] [2023-04-01 12:49:44,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:44,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:44,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:44,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:44,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:44,589 INFO L87 Difference]: Start difference. First operand 211 states and 304 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:44,656 INFO L93 Difference]: Finished difference Result 515 states and 767 transitions. [2023-04-01 12:49:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:44,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 51 [2023-04-01 12:49:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:44,659 INFO L225 Difference]: With dead ends: 515 [2023-04-01 12:49:44,659 INFO L226 Difference]: Without dead ends: 342 [2023-04-01 12:49:44,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:44,666 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 92 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:44,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 269 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:44,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-04-01 12:49:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 340. [2023-04-01 12:49:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 336 states have (on average 1.4702380952380953) internal successors, (494), 336 states have internal predecessors, (494), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 497 transitions. [2023-04-01 12:49:44,708 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 497 transitions. Word has length 51 [2023-04-01 12:49:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:44,709 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 497 transitions. [2023-04-01 12:49:44,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 497 transitions. [2023-04-01 12:49:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 12:49:44,712 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:44,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:49:44,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:44,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:44,715 INFO L85 PathProgramCache]: Analyzing trace with hash 973578143, now seen corresponding path program 1 times [2023-04-01 12:49:44,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:44,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348052941] [2023-04-01 12:49:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:44,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:44,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:44,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348052941] [2023-04-01 12:49:44,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348052941] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:44,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:44,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:44,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182403989] [2023-04-01 12:49:44,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:44,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:44,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:44,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:44,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:44,804 INFO L87 Difference]: Start difference. First operand 340 states and 497 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:44,856 INFO L93 Difference]: Finished difference Result 831 states and 1246 transitions. [2023-04-01 12:49:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 12:49:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:44,859 INFO L225 Difference]: With dead ends: 831 [2023-04-01 12:49:44,859 INFO L226 Difference]: Without dead ends: 529 [2023-04-01 12:49:44,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:44,868 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 91 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:44,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 236 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-04-01 12:49:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 527. [2023-04-01 12:49:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 523 states have (on average 1.491395793499044) internal successors, (780), 523 states have internal predecessors, (780), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 783 transitions. [2023-04-01 12:49:44,903 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 783 transitions. Word has length 53 [2023-04-01 12:49:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:44,904 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 783 transitions. [2023-04-01 12:49:44,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 783 transitions. [2023-04-01 12:49:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:49:44,908 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:44,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:44,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:49:44,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:44,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1580093760, now seen corresponding path program 1 times [2023-04-01 12:49:44,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:44,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365486457] [2023-04-01 12:49:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:44,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:44,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:44,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365486457] [2023-04-01 12:49:44,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365486457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:44,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:44,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:44,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043388335] [2023-04-01 12:49:44,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:44,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:44,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:44,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:44,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:44,978 INFO L87 Difference]: Start difference. First operand 527 states and 783 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:45,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:45,059 INFO L93 Difference]: Finished difference Result 1347 states and 2018 transitions. [2023-04-01 12:49:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:45,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 55 [2023-04-01 12:49:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:45,065 INFO L225 Difference]: With dead ends: 1347 [2023-04-01 12:49:45,065 INFO L226 Difference]: Without dead ends: 874 [2023-04-01 12:49:45,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:45,067 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 86 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:45,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 245 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2023-04-01 12:49:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2023-04-01 12:49:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 868 states have (on average 1.4792626728110598) internal successors, (1284), 868 states have internal predecessors, (1284), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1287 transitions. [2023-04-01 12:49:45,145 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1287 transitions. Word has length 55 [2023-04-01 12:49:45,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:45,145 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1287 transitions. [2023-04-01 12:49:45,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1287 transitions. [2023-04-01 12:49:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 12:49:45,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:45,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:45,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:49:45,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:45,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash 888083464, now seen corresponding path program 1 times [2023-04-01 12:49:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:45,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934327378] [2023-04-01 12:49:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:45,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:45,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934327378] [2023-04-01 12:49:45,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934327378] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:45,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:45,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:45,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674104277] [2023-04-01 12:49:45,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:45,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:45,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:45,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:45,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:45,227 INFO L87 Difference]: Start difference. First operand 872 states and 1287 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:45,366 INFO L93 Difference]: Finished difference Result 2179 states and 3257 transitions. [2023-04-01 12:49:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:45,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 57 [2023-04-01 12:49:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:45,371 INFO L225 Difference]: With dead ends: 2179 [2023-04-01 12:49:45,371 INFO L226 Difference]: Without dead ends: 1361 [2023-04-01 12:49:45,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:45,374 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 85 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:45,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 238 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2023-04-01 12:49:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1359. [2023-04-01 12:49:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1355 states have (on average 1.4900369003690037) internal successors, (2019), 1355 states have internal predecessors, (2019), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2022 transitions. [2023-04-01 12:49:45,473 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2022 transitions. Word has length 57 [2023-04-01 12:49:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:45,474 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 2022 transitions. [2023-04-01 12:49:45,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2022 transitions. [2023-04-01 12:49:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 12:49:45,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:45,474 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] [2023-04-01 12:49:45,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:49:45,474 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:45,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2038268759, now seen corresponding path program 1 times [2023-04-01 12:49:45,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:45,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591932105] [2023-04-01 12:49:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:45,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:45,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:45,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591932105] [2023-04-01 12:49:45,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591932105] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:45,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:45,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:49:45,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422466932] [2023-04-01 12:49:45,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:45,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:49:45,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:45,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:49:45,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:49:45,649 INFO L87 Difference]: Start difference. First operand 1359 states and 2022 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:45,956 INFO L93 Difference]: Finished difference Result 3447 states and 5166 transitions. [2023-04-01 12:49:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:49:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 59 [2023-04-01 12:49:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:45,964 INFO L225 Difference]: With dead ends: 3447 [2023-04-01 12:49:45,964 INFO L226 Difference]: Without dead ends: 2140 [2023-04-01 12:49:45,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:49:45,967 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 525 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:45,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 960 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:49:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2023-04-01 12:49:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2114. [2023-04-01 12:49:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2110 states have (on average 1.4985781990521327) internal successors, (3162), 2110 states have internal predecessors, (3162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3165 transitions. [2023-04-01 12:49:46,141 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3165 transitions. Word has length 59 [2023-04-01 12:49:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:46,142 INFO L495 AbstractCegarLoop]: Abstraction has 2114 states and 3165 transitions. [2023-04-01 12:49:46,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3165 transitions. [2023-04-01 12:49:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:49:46,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:46,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:46,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:49:46,143 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:46,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1176567476, now seen corresponding path program 1 times [2023-04-01 12:49:46,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:46,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579558153] [2023-04-01 12:49:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:46,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:46,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:46,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579558153] [2023-04-01 12:49:46,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579558153] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:46,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:46,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:49:46,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213399418] [2023-04-01 12:49:46,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:46,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:49:46,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:46,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:49:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:49:46,224 INFO L87 Difference]: Start difference. First operand 2114 states and 3165 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:46,462 INFO L93 Difference]: Finished difference Result 4160 states and 6245 transitions. [2023-04-01 12:49:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:49:46,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-01 12:49:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:46,469 INFO L225 Difference]: With dead ends: 4160 [2023-04-01 12:49:46,469 INFO L226 Difference]: Without dead ends: 2116 [2023-04-01 12:49:46,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:49:46,474 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 174 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:46,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 347 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2023-04-01 12:49:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 2111. [2023-04-01 12:49:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2107 states have (on average 1.4935927859515898) internal successors, (3147), 2107 states have internal predecessors, (3147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3150 transitions. [2023-04-01 12:49:46,620 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3150 transitions. Word has length 60 [2023-04-01 12:49:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:46,620 INFO L495 AbstractCegarLoop]: Abstraction has 2111 states and 3150 transitions. [2023-04-01 12:49:46,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3150 transitions. [2023-04-01 12:49:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 12:49:46,621 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:46,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:49:46,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:49:46,621 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:46,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:46,621 INFO L85 PathProgramCache]: Analyzing trace with hash 286675144, now seen corresponding path program 1 times [2023-04-01 12:49:46,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:46,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959189094] [2023-04-01 12:49:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:46,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:46,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959189094] [2023-04-01 12:49:46,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959189094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:46,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:46,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:49:46,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623006511] [2023-04-01 12:49:46,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:46,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:49:46,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:46,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:49:46,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:49:46,857 INFO L87 Difference]: Start difference. First operand 2111 states and 3150 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:47,174 INFO L93 Difference]: Finished difference Result 3444 states and 5086 transitions. [2023-04-01 12:49:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:49:47,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-01 12:49:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:47,186 INFO L225 Difference]: With dead ends: 3444 [2023-04-01 12:49:47,186 INFO L226 Difference]: Without dead ends: 3442 [2023-04-01 12:49:47,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:49:47,189 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 176 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:47,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 686 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:49:47,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2023-04-01 12:49:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 2155. [2023-04-01 12:49:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2151 states have (on average 1.4728033472803348) internal successors, (3168), 2151 states have internal predecessors, (3168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 3171 transitions. [2023-04-01 12:49:47,465 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 3171 transitions. Word has length 68 [2023-04-01 12:49:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:47,465 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 3171 transitions. [2023-04-01 12:49:47,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 3171 transitions. [2023-04-01 12:49:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 12:49:47,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:47,469 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:49:47,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:49:47,470 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:47,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash -451444386, now seen corresponding path program 1 times [2023-04-01 12:49:47,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:47,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394194342] [2023-04-01 12:49:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:47,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:48,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:48,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394194342] [2023-04-01 12:49:48,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394194342] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:49:48,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227773811] [2023-04-01 12:49:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:48,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:49:48,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:49:48,399 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) [2023-04-01 12:49:48,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:49:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:48,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 12:49:48,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:49:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:49:48,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:49:48,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227773811] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:48,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:49:48,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2023-04-01 12:49:48,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848964943] [2023-04-01 12:49:48,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:48,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:49:48,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:48,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:49:48,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:49:48,977 INFO L87 Difference]: Start difference. First operand 2155 states and 3171 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:49,635 INFO L93 Difference]: Finished difference Result 6187 states and 9117 transitions. [2023-04-01 12:49:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:49:49,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-01 12:49:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:49,647 INFO L225 Difference]: With dead ends: 6187 [2023-04-01 12:49:49,648 INFO L226 Difference]: Without dead ends: 4099 [2023-04-01 12:49:49,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:49:49,651 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 306 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:49,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 331 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2023-04-01 12:49:50,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 4097. [2023-04-01 12:49:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4093 states have (on average 1.464695822135353) internal successors, (5995), 4093 states have internal predecessors, (5995), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 5998 transitions. [2023-04-01 12:49:50,181 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 5998 transitions. Word has length 78 [2023-04-01 12:49:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:50,182 INFO L495 AbstractCegarLoop]: Abstraction has 4097 states and 5998 transitions. [2023-04-01 12:49:50,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 5998 transitions. [2023-04-01 12:49:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 12:49:50,183 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:50,183 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:49:50,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:49:50,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 12:49:50,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:50,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash 470585833, now seen corresponding path program 1 times [2023-04-01 12:49:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:50,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425598930] [2023-04-01 12:49:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:50,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:49:50,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:50,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425598930] [2023-04-01 12:49:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425598930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:50,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:50,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:50,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105629697] [2023-04-01 12:49:50,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:50,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:50,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:50,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:50,465 INFO L87 Difference]: Start difference. First operand 4097 states and 5998 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:51,057 INFO L93 Difference]: Finished difference Result 9501 states and 13966 transitions. [2023-04-01 12:49:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:51,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 79 [2023-04-01 12:49:51,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:51,073 INFO L225 Difference]: With dead ends: 9501 [2023-04-01 12:49:51,073 INFO L226 Difference]: Without dead ends: 5466 [2023-04-01 12:49:51,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:51,079 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 86 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:51,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 250 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2023-04-01 12:49:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 5464. [2023-04-01 12:49:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5464 states, 5460 states have (on average 1.4558608058608058) internal successors, (7949), 5460 states have internal predecessors, (7949), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5464 states to 5464 states and 7952 transitions. [2023-04-01 12:49:51,656 INFO L78 Accepts]: Start accepts. Automaton has 5464 states and 7952 transitions. Word has length 79 [2023-04-01 12:49:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:51,656 INFO L495 AbstractCegarLoop]: Abstraction has 5464 states and 7952 transitions. [2023-04-01 12:49:51,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5464 states and 7952 transitions. [2023-04-01 12:49:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 12:49:51,657 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:51,657 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:49:51,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:49:51,657 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:51,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1778228531, now seen corresponding path program 1 times [2023-04-01 12:49:51,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:51,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510221222] [2023-04-01 12:49:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:51,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:49:52,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:52,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510221222] [2023-04-01 12:49:52,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510221222] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:49:52,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215222944] [2023-04-01 12:49:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:52,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:49:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:49:52,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:49:52,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 12:49:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:52,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 12:49:52,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:49:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 12:49:52,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:49:52,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215222944] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:52,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:49:52,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 12:49:52,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094178100] [2023-04-01 12:49:52,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:52,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:49:52,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:52,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:49:52,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:49:52,957 INFO L87 Difference]: Start difference. First operand 5464 states and 7952 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:54,373 INFO L93 Difference]: Finished difference Result 15821 states and 22988 transitions. [2023-04-01 12:49:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:49:54,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2023-04-01 12:49:54,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:54,403 INFO L225 Difference]: With dead ends: 15821 [2023-04-01 12:49:54,403 INFO L226 Difference]: Without dead ends: 10408 [2023-04-01 12:49:54,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:49:54,412 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 314 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:54,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 331 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10408 states. [2023-04-01 12:49:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10408 to 10406. [2023-04-01 12:49:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10406 states, 10402 states have (on average 1.4416458373389733) internal successors, (14996), 10402 states have internal predecessors, (14996), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10406 states to 10406 states and 14999 transitions. [2023-04-01 12:49:55,801 INFO L78 Accepts]: Start accepts. Automaton has 10406 states and 14999 transitions. Word has length 82 [2023-04-01 12:49:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:55,801 INFO L495 AbstractCegarLoop]: Abstraction has 10406 states and 14999 transitions. [2023-04-01 12:49:55,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 10406 states and 14999 transitions. [2023-04-01 12:49:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-01 12:49:55,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:55,803 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:49:55,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 12:49:56,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 12:49:56,009 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:56,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash -648476326, now seen corresponding path program 1 times [2023-04-01 12:49:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:56,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134360561] [2023-04-01 12:49:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 12:49:56,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:56,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134360561] [2023-04-01 12:49:56,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134360561] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:56,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:56,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:49:56,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398853501] [2023-04-01 12:49:56,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:56,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:49:56,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:56,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:49:56,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:56,063 INFO L87 Difference]: Start difference. First operand 10406 states and 14999 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:49:57,731 INFO L93 Difference]: Finished difference Result 24564 states and 35573 transitions. [2023-04-01 12:49:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:49:57,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 83 [2023-04-01 12:49:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:49:57,755 INFO L225 Difference]: With dead ends: 24564 [2023-04-01 12:49:57,755 INFO L226 Difference]: Without dead ends: 14204 [2023-04-01 12:49:57,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:49:57,768 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 92 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:49:57,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 251 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:49:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14204 states. [2023-04-01 12:49:59,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14204 to 14202. [2023-04-01 12:49:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14202 states, 14198 states have (on average 1.4323144104803494) internal successors, (20336), 14198 states have internal predecessors, (20336), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14202 states to 14202 states and 20339 transitions. [2023-04-01 12:49:59,544 INFO L78 Accepts]: Start accepts. Automaton has 14202 states and 20339 transitions. Word has length 83 [2023-04-01 12:49:59,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:49:59,544 INFO L495 AbstractCegarLoop]: Abstraction has 14202 states and 20339 transitions. [2023-04-01 12:49:59,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:49:59,545 INFO L276 IsEmpty]: Start isEmpty. Operand 14202 states and 20339 transitions. [2023-04-01 12:49:59,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 12:49:59,546 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:49:59,546 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:49:59,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:49:59,546 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:49:59,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:49:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1401709011, now seen corresponding path program 1 times [2023-04-01 12:49:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:49:59,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489771904] [2023-04-01 12:49:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:59,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:49:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 12:49:59,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:59,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489771904] [2023-04-01 12:49:59,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489771904] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:49:59,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:49:59,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:49:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540080187] [2023-04-01 12:49:59,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:49:59,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:49:59,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:49:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:49:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:49:59,633 INFO L87 Difference]: Start difference. First operand 14202 states and 20339 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:01,517 INFO L93 Difference]: Finished difference Result 28360 states and 40631 transitions. [2023-04-01 12:50:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:50:01,518 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 86 [2023-04-01 12:50:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:01,545 INFO L225 Difference]: With dead ends: 28360 [2023-04-01 12:50:01,545 INFO L226 Difference]: Without dead ends: 14202 [2023-04-01 12:50:01,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:50:01,565 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 329 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:01,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 122 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:50:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14202 states. [2023-04-01 12:50:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14202 to 14202. [2023-04-01 12:50:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14202 states, 14198 states have (on average 1.4123115931821384) internal successors, (20052), 14198 states have internal predecessors, (20052), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14202 states to 14202 states and 20055 transitions. [2023-04-01 12:50:03,635 INFO L78 Accepts]: Start accepts. Automaton has 14202 states and 20055 transitions. Word has length 86 [2023-04-01 12:50:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:03,635 INFO L495 AbstractCegarLoop]: Abstraction has 14202 states and 20055 transitions. [2023-04-01 12:50:03,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 14202 states and 20055 transitions. [2023-04-01 12:50:03,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 12:50:03,637 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:03,637 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:50:03,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:50:03,637 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:03,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:03,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1742919224, now seen corresponding path program 1 times [2023-04-01 12:50:03,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:03,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3194819] [2023-04-01 12:50:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:03,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:50:04,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:04,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3194819] [2023-04-01 12:50:04,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3194819] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:50:04,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848889179] [2023-04-01 12:50:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:04,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:50:04,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:50:04,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:50:04,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 12:50:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:04,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 12:50:04,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:50:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:50:04,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:50:04,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848889179] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:04,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:50:04,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 12:50:04,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101362762] [2023-04-01 12:50:04,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:04,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:50:04,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:04,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:50:04,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:50:04,696 INFO L87 Difference]: Start difference. First operand 14202 states and 20055 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:09,260 INFO L93 Difference]: Finished difference Result 41430 states and 58369 transitions. [2023-04-01 12:50:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:50:09,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 86 [2023-04-01 12:50:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:09,308 INFO L225 Difference]: With dead ends: 41430 [2023-04-01 12:50:09,308 INFO L226 Difference]: Without dead ends: 27326 [2023-04-01 12:50:09,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:50:09,329 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 285 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:09,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 323 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:50:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27326 states. [2023-04-01 12:50:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27326 to 27324. [2023-04-01 12:50:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27324 states, 27320 states have (on average 1.3992679355783308) internal successors, (38228), 27320 states have internal predecessors, (38228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27324 states to 27324 states and 38231 transitions. [2023-04-01 12:50:14,266 INFO L78 Accepts]: Start accepts. Automaton has 27324 states and 38231 transitions. Word has length 86 [2023-04-01 12:50:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:14,266 INFO L495 AbstractCegarLoop]: Abstraction has 27324 states and 38231 transitions. [2023-04-01 12:50:14,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 27324 states and 38231 transitions. [2023-04-01 12:50:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 12:50:14,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:14,267 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:50:14,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 12:50:14,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:50:14,494 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:14,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1237276395, now seen corresponding path program 1 times [2023-04-01 12:50:14,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:14,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007276358] [2023-04-01 12:50:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:14,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:50:14,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:14,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007276358] [2023-04-01 12:50:14,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007276358] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:14,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:14,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:50:14,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135156539] [2023-04-01 12:50:14,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:14,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:50:14,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:50:14,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:14,651 INFO L87 Difference]: Start difference. First operand 27324 states and 38231 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:20,582 INFO L93 Difference]: Finished difference Result 63456 states and 88981 transitions. [2023-04-01 12:50:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:50:20,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 87 [2023-04-01 12:50:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:20,672 INFO L225 Difference]: With dead ends: 63456 [2023-04-01 12:50:20,672 INFO L226 Difference]: Without dead ends: 36230 [2023-04-01 12:50:20,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:50:20,709 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 70 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:20,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 251 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:50:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36230 states. [2023-04-01 12:50:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36230 to 36228. [2023-04-01 12:50:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36228 states, 36224 states have (on average 1.387809187279152) internal successors, (50272), 36224 states have internal predecessors, (50272), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36228 states to 36228 states and 50275 transitions. [2023-04-01 12:50:27,315 INFO L78 Accepts]: Start accepts. Automaton has 36228 states and 50275 transitions. Word has length 87 [2023-04-01 12:50:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:27,315 INFO L495 AbstractCegarLoop]: Abstraction has 36228 states and 50275 transitions. [2023-04-01 12:50:27,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 36228 states and 50275 transitions. [2023-04-01 12:50:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 12:50:27,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:27,317 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:50:27,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:50:27,317 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:27,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:27,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1036289982, now seen corresponding path program 1 times [2023-04-01 12:50:27,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:27,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873606754] [2023-04-01 12:50:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:27,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:50:27,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:27,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873606754] [2023-04-01 12:50:27,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873606754] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:27,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:50:27,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:50:27,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377440166] [2023-04-01 12:50:27,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:27,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:50:27,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:27,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:50:27,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:50:27,412 INFO L87 Difference]: Start difference. First operand 36228 states and 50275 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:50:34,128 INFO L93 Difference]: Finished difference Result 72358 states and 100436 transitions. [2023-04-01 12:50:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:50:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 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 90 [2023-04-01 12:50:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:50:34,192 INFO L225 Difference]: With dead ends: 72358 [2023-04-01 12:50:34,192 INFO L226 Difference]: Without dead ends: 36228 [2023-04-01 12:50:34,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:50:34,223 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 299 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:50:34,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 126 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:50:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36228 states. [2023-04-01 12:50:40,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36228 to 36228. [2023-04-01 12:50:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36228 states, 36224 states have (on average 1.3715768551236749) internal successors, (49684), 36224 states have internal predecessors, (49684), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36228 states to 36228 states and 49687 transitions. [2023-04-01 12:50:41,076 INFO L78 Accepts]: Start accepts. Automaton has 36228 states and 49687 transitions. Word has length 90 [2023-04-01 12:50:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:50:41,076 INFO L495 AbstractCegarLoop]: Abstraction has 36228 states and 49687 transitions. [2023-04-01 12:50:41,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:50:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 36228 states and 49687 transitions. [2023-04-01 12:50:41,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 12:50:41,079 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:50:41,079 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 12:50:41,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:50:41,079 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:50:41,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:50:41,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1787979299, now seen corresponding path program 1 times [2023-04-01 12:50:41,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:50:41,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719297843] [2023-04-01 12:50:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:41,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:50:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:50:41,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:50:41,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719297843] [2023-04-01 12:50:41,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719297843] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:50:41,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4646150] [2023-04-01 12:50:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:50:41,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:50:41,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:50:41,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:50:41,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 12:50:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:50:42,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 12:50:42,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:50:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:50:42,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:50:42,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4646150] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:50:42,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:50:42,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-04-01 12:50:42,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86131591] [2023-04-01 12:50:42,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:50:42,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:50:42,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:50:42,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:50:42,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:50:42,465 INFO L87 Difference]: Start difference. First operand 36228 states and 49687 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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)