/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 IntervalDomain -i ../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:31:53,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:31:53,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:31:53,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:31:53,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:31:53,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:31:53,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:31:53,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:31:53,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:31:53,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:31:53,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:31:53,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:31:53,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:31:53,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:31:53,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:31:53,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:31:53,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:31:53,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:31:53,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:31:53,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:31:53,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:31:53,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:31:53,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:31:53,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:31:53,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:31:53,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:31:53,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:31:53,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:31:53,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:31:53,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:31:53,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:31:53,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:31:53,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:31:53,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:31:53,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:31:53,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:31:53,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:31:53,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:31:53,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:31:53,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:31:53,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:31:53,623 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 [2023-03-31 23:31:53,637 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:31:53,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:31:53,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:31:53,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:31:53,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:31:53,638 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:31:53,638 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:31:53,639 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:31:53,639 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:31:53,639 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:31:53,639 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:31:53,639 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:31:53,639 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:31:53,639 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:31:53,639 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:31:53,639 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:31:53,639 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:31:53,640 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:31:53,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:31:53,640 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:31:53,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:31:53,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:31:53,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:31:53,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:31:53,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:31:53,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:31:53,641 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:31:53,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:31:53,641 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:31:53,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:31:53,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:31:53,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:31:53,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:31:53,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:31:53,642 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:31:53,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:31:53,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:31:53,643 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:31:53,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:31:53,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:31:53,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:31:53,643 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:31:53,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:31:53,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:31:53,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:31:53,843 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:31:53,846 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:31:53,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2023-03-31 23:31:54,901 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:31:55,175 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:31:55,175 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2023-03-31 23:31:55,187 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f351120e/85ce9318a9f845a9a61a4365c72f05e7/FLAG7d72d82c4 [2023-03-31 23:31:55,196 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f351120e/85ce9318a9f845a9a61a4365c72f05e7 [2023-03-31 23:31:55,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:31:55,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:31:55,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:31:55,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:31:55,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:31:55,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b0942f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55, skipping insertion in model container [2023-03-31 23:31:55,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:31:55,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:31:55,393 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/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2023-03-31 23:31:55,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:31:55,590 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:31:55,617 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/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2023-03-31 23:31:55,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:31:55,712 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:31:55,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55 WrapperNode [2023-03-31 23:31:55,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:31:55,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:31:55,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:31:55,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:31:55,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,862 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:31:55,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:31:55,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:31:55,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:31:55,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55" (1/1) ... [2023-03-31 23:31:55,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:31:55,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:31:55,954 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) [2023-03-31 23:31:55,980 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 [2023-03-31 23:31:56,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:31:56,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:31:56,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:31:56,004 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:31:56,005 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:31:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:31:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-03-31 23:31:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-03-31 23:31:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-03-31 23:31:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-03-31 23:31:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-03-31 23:31:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-03-31 23:31:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-03-31 23:31:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-03-31 23:31:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-03-31 23:31:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-03-31 23:31:56,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-03-31 23:31:56,009 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-03-31 23:31:56,009 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-03-31 23:31:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-03-31 23:31:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-03-31 23:31:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-03-31 23:31:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-03-31 23:31:56,011 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-03-31 23:31:56,011 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-03-31 23:31:56,011 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-03-31 23:31:56,011 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-03-31 23:31:56,011 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-03-31 23:31:56,011 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-03-31 23:31:56,012 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-03-31 23:31:56,012 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-03-31 23:31:56,012 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-03-31 23:31:56,012 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-03-31 23:31:56,012 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-03-31 23:31:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-03-31 23:31:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-03-31 23:31:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-03-31 23:31:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-03-31 23:31:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-03-31 23:31:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-03-31 23:31:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:31:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-03-31 23:31:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-03-31 23:31:56,013 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-03-31 23:31:56,014 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-03-31 23:31:56,014 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-03-31 23:31:56,014 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-03-31 23:31:56,014 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-03-31 23:31:56,014 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:31:56,014 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:31:56,014 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:31:56,014 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:31:56,014 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:31:56,014 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:31:56,014 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:31:56,014 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:31:56,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:31:56,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:31:56,015 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 23:31:56,015 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-03-31 23:31:56,015 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-03-31 23:31:56,015 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-03-31 23:31:56,015 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-03-31 23:31:56,016 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-03-31 23:31:56,016 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-03-31 23:31:56,016 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-03-31 23:31:56,016 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-03-31 23:31:56,016 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-03-31 23:31:56,016 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:31:56,016 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-03-31 23:31:56,016 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-03-31 23:31:56,016 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-03-31 23:31:56,016 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:31:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-03-31 23:31:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-03-31 23:31:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-03-31 23:31:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-03-31 23:31:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-03-31 23:31:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:31:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-03-31 23:31:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:31:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-03-31 23:31:56,019 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-03-31 23:31:56,019 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-03-31 23:31:56,020 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-03-31 23:31:56,020 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2023-03-31 23:31:56,020 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:31:56,022 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:31:56,022 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:31:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:31:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:31:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:31:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:31:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:31:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:31:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-03-31 23:31:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-03-31 23:31:56,029 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-03-31 23:31:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-03-31 23:31:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-03-31 23:31:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-03-31 23:31:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-03-31 23:31:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-03-31 23:31:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-03-31 23:31:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-03-31 23:31:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-03-31 23:31:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:31:56,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:31:56,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:31:56,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:31:56,248 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:31:56,250 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:31:57,207 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:31:57,807 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:31:57,807 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-03-31 23:31:57,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:31:57 BoogieIcfgContainer [2023-03-31 23:31:57,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:31:57,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:31:57,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:31:57,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:31:57,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:31:55" (1/3) ... [2023-03-31 23:31:57,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ac8a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:31:57, skipping insertion in model container [2023-03-31 23:31:57,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:31:55" (2/3) ... [2023-03-31 23:31:57,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ac8a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:31:57, skipping insertion in model container [2023-03-31 23:31:57,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:31:57" (3/3) ... [2023-03-31 23:31:57,817 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product23.cil.c [2023-03-31 23:31:57,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:31:57,834 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:31:57,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:31:57,891 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;@5b7559bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:31:57,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:31:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 565 states, 327 states have (on average 1.4587155963302751) internal successors, (477), 350 states have internal predecessors, (477), 174 states have call successors, (174), 52 states have call predecessors, (174), 52 states have return successors, (174), 169 states have call predecessors, (174), 174 states have call successors, (174) [2023-03-31 23:31:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-03-31 23:31:57,920 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:31:57,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:31:57,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:31:57,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:31:57,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1739132428, now seen corresponding path program 1 times [2023-03-31 23:31:57,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:31:57,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727644432] [2023-03-31 23:31:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:31:57,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:31:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:31:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:31:58,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:31:58,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727644432] [2023-03-31 23:31:58,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727644432] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:31:58,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:31:58,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:31:58,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779361810] [2023-03-31 23:31:58,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:31:58,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:31:58,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:31:58,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:31:58,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:31:58,754 INFO L87 Difference]: Start difference. First operand has 565 states, 327 states have (on average 1.4587155963302751) internal successors, (477), 350 states have internal predecessors, (477), 174 states have call successors, (174), 52 states have call predecessors, (174), 52 states have return successors, (174), 169 states have call predecessors, (174), 174 states have call successors, (174) Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-03-31 23:31:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:31:59,240 INFO L93 Difference]: Finished difference Result 1297 states and 1945 transitions. [2023-03-31 23:31:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:31:59,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 110 [2023-03-31 23:31:59,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:31:59,254 INFO L225 Difference]: With dead ends: 1297 [2023-03-31 23:31:59,254 INFO L226 Difference]: Without dead ends: 854 [2023-03-31 23:31:59,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:31:59,261 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 631 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:31:59,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 2529 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 23:31:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2023-03-31 23:31:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 847. [2023-03-31 23:31:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 534 states have (on average 1.4925093632958801) internal successors, (797), 563 states have internal predecessors, (797), 230 states have call successors, (230), 87 states have call predecessors, (230), 82 states have return successors, (233), 220 states have call predecessors, (233), 224 states have call successors, (233) [2023-03-31 23:31:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1260 transitions. [2023-03-31 23:31:59,327 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1260 transitions. Word has length 110 [2023-03-31 23:31:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:31:59,327 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1260 transitions. [2023-03-31 23:31:59,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-03-31 23:31:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1260 transitions. [2023-03-31 23:31:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-03-31 23:31:59,331 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:31:59,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:31:59,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:31:59,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:31:59,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:31:59,331 INFO L85 PathProgramCache]: Analyzing trace with hash 379931813, now seen corresponding path program 1 times [2023-03-31 23:31:59,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:31:59,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449741577] [2023-03-31 23:31:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:31:59,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:31:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:31:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:31:59,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:31:59,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449741577] [2023-03-31 23:31:59,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449741577] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:31:59,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:31:59,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:31:59,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839365748] [2023-03-31 23:31:59,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:31:59,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:31:59,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:31:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:31:59,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:31:59,788 INFO L87 Difference]: Start difference. First operand 847 states and 1260 transitions. Second operand has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-03-31 23:32:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:00,485 INFO L93 Difference]: Finished difference Result 989 states and 1435 transitions. [2023-03-31 23:32:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:32:00,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 114 [2023-03-31 23:32:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:00,491 INFO L225 Difference]: With dead ends: 989 [2023-03-31 23:32:00,491 INFO L226 Difference]: Without dead ends: 986 [2023-03-31 23:32:00,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:32:00,492 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 775 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 3168 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:00,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 3168 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 23:32:00,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2023-03-31 23:32:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 978. [2023-03-31 23:32:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 610 states have (on average 1.4540983606557376) internal successors, (887), 638 states have internal predecessors, (887), 263 states have call successors, (263), 109 states have call predecessors, (263), 104 states have return successors, (273), 254 states have call predecessors, (273), 256 states have call successors, (273) [2023-03-31 23:32:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1423 transitions. [2023-03-31 23:32:00,533 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1423 transitions. Word has length 114 [2023-03-31 23:32:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:00,534 INFO L495 AbstractCegarLoop]: Abstraction has 978 states and 1423 transitions. [2023-03-31 23:32:00,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-03-31 23:32:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1423 transitions. [2023-03-31 23:32:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-03-31 23:32:00,544 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:00,544 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:00,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:32:00,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:00,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1594750555, now seen corresponding path program 1 times [2023-03-31 23:32:00,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:00,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878512829] [2023-03-31 23:32:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:00,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-03-31 23:32:00,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:00,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878512829] [2023-03-31 23:32:00,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878512829] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:00,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:00,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:32:00,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605596965] [2023-03-31 23:32:00,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:00,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:32:00,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:00,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:32:00,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:32:00,849 INFO L87 Difference]: Start difference. First operand 978 states and 1423 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2023-03-31 23:32:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:00,976 INFO L93 Difference]: Finished difference Result 1935 states and 2833 transitions. [2023-03-31 23:32:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:00,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 150 [2023-03-31 23:32:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:00,982 INFO L225 Difference]: With dead ends: 1935 [2023-03-31 23:32:00,982 INFO L226 Difference]: Without dead ends: 988 [2023-03-31 23:32:00,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:32:00,989 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 10 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2423 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:00,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2423 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:32:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2023-03-31 23:32:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 988. [2023-03-31 23:32:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 617 states have (on average 1.4489465153970826) internal successors, (894), 646 states have internal predecessors, (894), 263 states have call successors, (263), 109 states have call predecessors, (263), 107 states have return successors, (276), 256 states have call predecessors, (276), 256 states have call successors, (276) [2023-03-31 23:32:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1433 transitions. [2023-03-31 23:32:01,031 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1433 transitions. Word has length 150 [2023-03-31 23:32:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:01,032 INFO L495 AbstractCegarLoop]: Abstraction has 988 states and 1433 transitions. [2023-03-31 23:32:01,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2023-03-31 23:32:01,032 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1433 transitions. [2023-03-31 23:32:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-03-31 23:32:01,037 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:01,037 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:01,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 23:32:01,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:01,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:01,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2059783209, now seen corresponding path program 1 times [2023-03-31 23:32:01,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:01,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812797152] [2023-03-31 23:32:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-03-31 23:32:01,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:01,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812797152] [2023-03-31 23:32:01,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812797152] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:01,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325718916] [2023-03-31 23:32:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:01,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:01,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:01,563 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) [2023-03-31 23:32:01,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:32:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:02,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:32:02,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-31 23:32:02,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:02,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325718916] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:02,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:02,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-03-31 23:32:02,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308291046] [2023-03-31 23:32:02,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:02,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:02,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:02,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:02,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:32:02,071 INFO L87 Difference]: Start difference. First operand 988 states and 1433 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:32:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:02,291 INFO L93 Difference]: Finished difference Result 2023 states and 2999 transitions. [2023-03-31 23:32:02,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:02,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 159 [2023-03-31 23:32:02,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:02,296 INFO L225 Difference]: With dead ends: 2023 [2023-03-31 23:32:02,296 INFO L226 Difference]: Without dead ends: 1066 [2023-03-31 23:32:02,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:32:02,300 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 213 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:02,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1611 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:32:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2023-03-31 23:32:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1066. [2023-03-31 23:32:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 693 states have (on average 1.5007215007215007) internal successors, (1040), 722 states have internal predecessors, (1040), 263 states have call successors, (263), 111 states have call predecessors, (263), 109 states have return successors, (276), 256 states have call predecessors, (276), 256 states have call successors, (276) [2023-03-31 23:32:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1579 transitions. [2023-03-31 23:32:02,338 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1579 transitions. Word has length 159 [2023-03-31 23:32:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:02,339 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1579 transitions. [2023-03-31 23:32:02,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:32:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1579 transitions. [2023-03-31 23:32:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-03-31 23:32:02,343 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:02,343 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:02,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 23:32:02,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:02,552 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:02,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:02,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1002710224, now seen corresponding path program 1 times [2023-03-31 23:32:02,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:02,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818308585] [2023-03-31 23:32:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:02,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-03-31 23:32:02,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818308585] [2023-03-31 23:32:02,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818308585] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693054951] [2023-03-31 23:32:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:02,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:02,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:02,735 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) [2023-03-31 23:32:02,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:32:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:03,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 2617 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:32:03,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 23:32:03,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:03,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693054951] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:03,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:03,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:32:03,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469940527] [2023-03-31 23:32:03,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:03,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:03,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:03,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:32:03,192 INFO L87 Difference]: Start difference. First operand 1066 states and 1579 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:32:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:03,391 INFO L93 Difference]: Finished difference Result 2179 states and 3289 transitions. [2023-03-31 23:32:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:03,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 164 [2023-03-31 23:32:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:03,396 INFO L225 Difference]: With dead ends: 2179 [2023-03-31 23:32:03,396 INFO L226 Difference]: Without dead ends: 1144 [2023-03-31 23:32:03,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:32:03,399 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 211 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:03,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1611 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:32:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2023-03-31 23:32:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1144. [2023-03-31 23:32:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 769 states have (on average 1.542262678803641) internal successors, (1186), 798 states have internal predecessors, (1186), 263 states have call successors, (263), 113 states have call predecessors, (263), 111 states have return successors, (276), 256 states have call predecessors, (276), 256 states have call successors, (276) [2023-03-31 23:32:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1725 transitions. [2023-03-31 23:32:03,428 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1725 transitions. Word has length 164 [2023-03-31 23:32:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:03,428 INFO L495 AbstractCegarLoop]: Abstraction has 1144 states and 1725 transitions. [2023-03-31 23:32:03,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:32:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1725 transitions. [2023-03-31 23:32:03,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-03-31 23:32:03,431 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:03,432 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:03,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:03,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:03,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:03,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:03,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1528789792, now seen corresponding path program 1 times [2023-03-31 23:32:03,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:03,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031172086] [2023-03-31 23:32:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-03-31 23:32:03,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:03,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031172086] [2023-03-31 23:32:03,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031172086] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:03,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017549034] [2023-03-31 23:32:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:03,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:03,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:03,817 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) [2023-03-31 23:32:03,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:32:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:04,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:32:04,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-03-31 23:32:04,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:04,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017549034] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:04,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:04,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:32:04,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248710429] [2023-03-31 23:32:04,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:04,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:04,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:32:04,248 INFO L87 Difference]: Start difference. First operand 1144 states and 1725 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:32:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:04,444 INFO L93 Difference]: Finished difference Result 2335 states and 3579 transitions. [2023-03-31 23:32:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 168 [2023-03-31 23:32:04,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:04,449 INFO L225 Difference]: With dead ends: 2335 [2023-03-31 23:32:04,449 INFO L226 Difference]: Without dead ends: 1222 [2023-03-31 23:32:04,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:32:04,452 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 209 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:04,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1611 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:32:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2023-03-31 23:32:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1222. [2023-03-31 23:32:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 845 states have (on average 1.5763313609467455) internal successors, (1332), 874 states have internal predecessors, (1332), 263 states have call successors, (263), 115 states have call predecessors, (263), 113 states have return successors, (276), 256 states have call predecessors, (276), 256 states have call successors, (276) [2023-03-31 23:32:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1871 transitions. [2023-03-31 23:32:04,482 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1871 transitions. Word has length 168 [2023-03-31 23:32:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:04,482 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 1871 transitions. [2023-03-31 23:32:04,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:32:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1871 transitions. [2023-03-31 23:32:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-03-31 23:32:04,485 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:04,486 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:04,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:04,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:04,695 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:04,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:04,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1367550921, now seen corresponding path program 1 times [2023-03-31 23:32:04,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:04,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191151391] [2023-03-31 23:32:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-03-31 23:32:04,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:04,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191151391] [2023-03-31 23:32:04,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191151391] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:04,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853858726] [2023-03-31 23:32:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:04,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:04,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:04,827 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) [2023-03-31 23:32:04,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:32:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:05,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 2624 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:32:05,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-03-31 23:32:05,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:05,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853858726] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:05,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:05,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-03-31 23:32:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223028277] [2023-03-31 23:32:05,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:05,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:05,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:05,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:05,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:32:05,269 INFO L87 Difference]: Start difference. First operand 1222 states and 1871 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:32:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:05,457 INFO L93 Difference]: Finished difference Result 2491 states and 3869 transitions. [2023-03-31 23:32:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:05,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 171 [2023-03-31 23:32:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:05,463 INFO L225 Difference]: With dead ends: 2491 [2023-03-31 23:32:05,463 INFO L226 Difference]: Without dead ends: 1300 [2023-03-31 23:32:05,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:32:05,466 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 207 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:05,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1611 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:32:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2023-03-31 23:32:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1300. [2023-03-31 23:32:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 921 states have (on average 1.6047774158523345) internal successors, (1478), 950 states have internal predecessors, (1478), 263 states have call successors, (263), 117 states have call predecessors, (263), 115 states have return successors, (276), 256 states have call predecessors, (276), 256 states have call successors, (276) [2023-03-31 23:32:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 2017 transitions. [2023-03-31 23:32:05,497 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 2017 transitions. Word has length 171 [2023-03-31 23:32:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:05,497 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 2017 transitions. [2023-03-31 23:32:05,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:32:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 2017 transitions. [2023-03-31 23:32:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-03-31 23:32:05,500 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:05,500 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:05,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:05,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:05,709 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:05,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1653538855, now seen corresponding path program 1 times [2023-03-31 23:32:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:05,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637256001] [2023-03-31 23:32:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:05,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-03-31 23:32:06,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:06,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637256001] [2023-03-31 23:32:06,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637256001] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:06,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:06,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:32:06,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306345846] [2023-03-31 23:32:06,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:06,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:06,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:06,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:32:06,071 INFO L87 Difference]: Start difference. First operand 1300 states and 2017 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-03-31 23:32:06,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:06,267 INFO L93 Difference]: Finished difference Result 2653 states and 4157 transitions. [2023-03-31 23:32:06,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:06,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 173 [2023-03-31 23:32:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:06,272 INFO L225 Difference]: With dead ends: 2653 [2023-03-31 23:32:06,272 INFO L226 Difference]: Without dead ends: 1368 [2023-03-31 23:32:06,275 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 [2023-03-31 23:32:06,276 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 99 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:06,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1624 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:32:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2023-03-31 23:32:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1368. [2023-03-31 23:32:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 987 states have (on average 1.5339412360688955) internal successors, (1514), 1016 states have internal predecessors, (1514), 263 states have call successors, (263), 119 states have call predecessors, (263), 117 states have return successors, (276), 256 states have call predecessors, (276), 256 states have call successors, (276) [2023-03-31 23:32:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2053 transitions. [2023-03-31 23:32:06,305 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2053 transitions. Word has length 173 [2023-03-31 23:32:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:06,305 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2053 transitions. [2023-03-31 23:32:06,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-03-31 23:32:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2053 transitions. [2023-03-31 23:32:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-03-31 23:32:06,308 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:06,308 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 23:32:06,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:06,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:06,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1496687338, now seen corresponding path program 1 times [2023-03-31 23:32:06,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:06,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426960326] [2023-03-31 23:32:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:06,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-03-31 23:32:06,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:06,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426960326] [2023-03-31 23:32:06,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426960326] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:06,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:06,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:32:06,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969976123] [2023-03-31 23:32:06,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:06,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:32:06,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:32:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:32:06,607 INFO L87 Difference]: Start difference. First operand 1368 states and 2053 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 5 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-03-31 23:32:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:07,202 INFO L93 Difference]: Finished difference Result 2916 states and 4424 transitions. [2023-03-31 23:32:07,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:32:07,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 5 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) Word has length 173 [2023-03-31 23:32:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:07,208 INFO L225 Difference]: With dead ends: 2916 [2023-03-31 23:32:07,208 INFO L226 Difference]: Without dead ends: 1336 [2023-03-31 23:32:07,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-03-31 23:32:07,214 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 843 mSDsluCounter, 3026 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 3716 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:07,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 3716 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 23:32:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2023-03-31 23:32:07,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1320. [2023-03-31 23:32:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 884 states have (on average 1.4287330316742082) internal successors, (1263), 921 states have internal predecessors, (1263), 302 states have call successors, (302), 135 states have call predecessors, (302), 133 states have return successors, (330), 292 states have call predecessors, (330), 295 states have call successors, (330) [2023-03-31 23:32:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1895 transitions. [2023-03-31 23:32:07,256 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1895 transitions. Word has length 173 [2023-03-31 23:32:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:07,257 INFO L495 AbstractCegarLoop]: Abstraction has 1320 states and 1895 transitions. [2023-03-31 23:32:07,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 5 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-03-31 23:32:07,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1895 transitions. [2023-03-31 23:32:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-03-31 23:32:07,262 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:07,262 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:07,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 23:32:07,262 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:07,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash 446729040, now seen corresponding path program 1 times [2023-03-31 23:32:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:07,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795134642] [2023-03-31 23:32:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:07,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-03-31 23:32:09,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795134642] [2023-03-31 23:32:09,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795134642] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214667375] [2023-03-31 23:32:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:09,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:09,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:09,026 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:09,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:32:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:09,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 2627 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 23:32:09,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-03-31 23:32:09,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:09,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214667375] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:09,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:09,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2023-03-31 23:32:09,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133726965] [2023-03-31 23:32:09,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:09,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:32:09,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:09,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:32:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2023-03-31 23:32:09,770 INFO L87 Difference]: Start difference. First operand 1320 states and 1895 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:32:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:10,380 INFO L93 Difference]: Finished difference Result 3883 states and 5643 transitions. [2023-03-31 23:32:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 23:32:10,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) Word has length 174 [2023-03-31 23:32:10,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:10,397 INFO L225 Difference]: With dead ends: 3883 [2023-03-31 23:32:10,397 INFO L226 Difference]: Without dead ends: 2593 [2023-03-31 23:32:10,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2023-03-31 23:32:10,403 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 574 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:10,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1617 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 23:32:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2023-03-31 23:32:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2495. [2023-03-31 23:32:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1717 states have (on average 1.4397204426324985) internal successors, (2472), 1778 states have internal predecessors, (2472), 529 states have call successors, (529), 247 states have call predecessors, (529), 248 states have return successors, (602), 498 states have call predecessors, (602), 519 states have call successors, (602) [2023-03-31 23:32:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3603 transitions. [2023-03-31 23:32:10,619 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3603 transitions. Word has length 174 [2023-03-31 23:32:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:10,619 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 3603 transitions. [2023-03-31 23:32:10,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:32:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3603 transitions. [2023-03-31 23:32:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-03-31 23:32:10,640 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:10,640 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:10,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:32:10,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 23:32:10,849 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:10,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash 61821830, now seen corresponding path program 1 times [2023-03-31 23:32:10,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:10,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680045749] [2023-03-31 23:32:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:10,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-03-31 23:32:11,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:11,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680045749] [2023-03-31 23:32:11,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680045749] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:11,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630463365] [2023-03-31 23:32:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:11,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:11,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:11,169 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:11,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:32:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:11,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 2642 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:32:11,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-03-31 23:32:11,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:32:11,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630463365] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:11,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:32:11,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-03-31 23:32:11,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996774023] [2023-03-31 23:32:11,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:11,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:32:11,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:32:11,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:32:11,781 INFO L87 Difference]: Start difference. First operand 2495 states and 3603 transitions. Second operand has 6 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-03-31 23:32:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:12,605 INFO L93 Difference]: Finished difference Result 4979 states and 7218 transitions. [2023-03-31 23:32:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:32:12,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 181 [2023-03-31 23:32:12,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:12,616 INFO L225 Difference]: With dead ends: 4979 [2023-03-31 23:32:12,616 INFO L226 Difference]: Without dead ends: 2514 [2023-03-31 23:32:12,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:32:12,623 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 437 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 2044 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:12,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 2044 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 23:32:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2023-03-31 23:32:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2487. [2023-03-31 23:32:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 1715 states have (on average 1.439067055393586) internal successors, (2468), 1772 states have internal predecessors, (2468), 523 states have call successors, (523), 247 states have call predecessors, (523), 248 states have return successors, (592), 496 states have call predecessors, (592), 513 states have call successors, (592) [2023-03-31 23:32:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3583 transitions. [2023-03-31 23:32:12,762 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3583 transitions. Word has length 181 [2023-03-31 23:32:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:12,763 INFO L495 AbstractCegarLoop]: Abstraction has 2487 states and 3583 transitions. [2023-03-31 23:32:12,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-03-31 23:32:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3583 transitions. [2023-03-31 23:32:12,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-03-31 23:32:12,768 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:12,768 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:12,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-31 23:32:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:12,976 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:12,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash 726043807, now seen corresponding path program 1 times [2023-03-31 23:32:12,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:12,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394965347] [2023-03-31 23:32:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:12,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-03-31 23:32:15,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394965347] [2023-03-31 23:32:15,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394965347] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:32:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893968252] [2023-03-31 23:32:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:15,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:32:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:15,731 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:32:15,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:32:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:16,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 23:32:16,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:32:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-03-31 23:32:17,228 INFO L327 TraceCheckSpWp]: Computing backward predicates...