/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.BOUNDED-12.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:53:53,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:53:53,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:53:53,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:53:53,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:53:53,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:53:53,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:53:53,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:53:53,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:53:53,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:53:53,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:53:53,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:53:53,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:53:53,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:53:53,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:53:53,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:53:53,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:53:53,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:53:53,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:53:53,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:53:53,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:53:53,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:53:53,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:53:53,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:53:53,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:53:53,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:53:53,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:53:53,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:53:53,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:53:53,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:53:53,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:53:53,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:53:53,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:53:53,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:53:53,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:53:53,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:53:53,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:53:53,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:53:53,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:53:53,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:53:53,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:53:53,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:53:53,770 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:53:53,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:53:53,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:53:53,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:53:53,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:53:53,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:53:53,771 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:53:53,771 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:53:53,771 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:53:53,772 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:53:53,772 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:53:53,772 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:53:53,772 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:53:53,772 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:53:53,772 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:53:53,772 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:53:53,772 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:53:53,773 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:53:53,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:53:53,773 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:53:53,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:53:53,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:53:53,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:53:53,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:53:53,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:53:53,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:53:53,774 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:53:53,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:53:53,774 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:53:53,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:53:53,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:53:53,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:53:53,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:53:53,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:53:53,775 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:53:53,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:53:53,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:53:53,775 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:53:53,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:53:53,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:53:53,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:53:53,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:53:53,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:53:53,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:53:53,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:53:53,999 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:53:54,000 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:53:54,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.BOUNDED-12.pals.c [2023-04-03 01:53:55,086 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:53:55,263 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:53:55,263 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.BOUNDED-12.pals.c [2023-04-03 01:53:55,272 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef942baa9/060459cb9e1148d799a1b1f9a640ccbc/FLAG717b3d831 [2023-04-03 01:53:55,284 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef942baa9/060459cb9e1148d799a1b1f9a640ccbc [2023-04-03 01:53:55,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:53:55,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:53:55,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:53:55,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:53:55,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:53:55,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f7b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55, skipping insertion in model container [2023-04-03 01:53:55,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:53:55,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:53:55,521 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.BOUNDED-12.pals.c[15112,15125] [2023-04-03 01:53:55,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:53:55,536 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:53:55,591 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.BOUNDED-12.pals.c[15112,15125] [2023-04-03 01:53:55,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:53:55,605 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:53:55,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55 WrapperNode [2023-04-03 01:53:55,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:53:55,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:53:55,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:53:55,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:53:55,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,681 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:53:55,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:53:55,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:53:55,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:53:55,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55" (1/1) ... [2023-04-03 01:53:55,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:53:55,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:53:55,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:53:55,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:53:55,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:53:55,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:53:55,753 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:53:55,753 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:53:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:53:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:53:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:53:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 01:53:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-03 01:53:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure node6 [2023-04-03 01:53:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:53:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:53:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:53:55,755 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:53:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:53:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:53:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:53:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:53:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:53:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:53:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:53:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:53:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:53:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:53:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:53:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:53:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:53:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 01:53:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 01:53:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 01:53:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:53:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:53:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:53:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:53:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:53:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:53:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:53:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:53:55,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:53:55,840 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:53:55,841 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:53:56,392 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:53:56,887 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:53:56,887 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:53:56,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:53:56 BoogieIcfgContainer [2023-04-03 01:53:56,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:53:56,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:53:56,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:53:56,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:53:56,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:53:55" (1/3) ... [2023-04-03 01:53:56,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:53:56, skipping insertion in model container [2023-04-03 01:53:56,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:53:55" (2/3) ... [2023-04-03 01:53:56,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:53:56, skipping insertion in model container [2023-04-03 01:53:56,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:53:56" (3/3) ... [2023-04-03 01:53:56,902 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c [2023-04-03 01:53:56,917 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:53:56,918 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:53:56,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:53:56,986 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;@7f1028c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:53:56,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:53:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-03 01:53:56,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 01:53:56,999 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:53:57,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:53:57,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:53:57,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:53:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1117000480, now seen corresponding path program 1 times [2023-04-03 01:53:57,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:53:57,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75276197] [2023-04-03 01:53:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:53:57,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:53:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:54:01,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:01,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75276197] [2023-04-03 01:54:01,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75276197] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:01,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:01,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-04-03 01:54:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791199866] [2023-04-03 01:54:01,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:01,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-03 01:54:01,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:01,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-03 01:54:01,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2023-04-03 01:54:01,902 INFO L87 Difference]: Start difference. First operand has 53 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-03 01:54:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:03,572 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2023-04-03 01:54:03,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-03 01:54:03,575 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 43 [2023-04-03 01:54:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:03,588 INFO L225 Difference]: With dead ends: 136 [2023-04-03 01:54:03,588 INFO L226 Difference]: Without dead ends: 87 [2023-04-03 01:54:03,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=615, Invalid=2577, Unknown=0, NotChecked=0, Total=3192 [2023-04-03 01:54:03,597 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 482 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:03,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 174 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:54:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-03 01:54:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2023-04-03 01:54:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-04-03 01:54:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-04-03 01:54:03,668 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 43 [2023-04-03 01:54:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:03,670 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-04-03 01:54:03,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-03 01:54:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-04-03 01:54:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 01:54:03,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:03,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:54:03,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:54:03,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:03,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:03,675 INFO L85 PathProgramCache]: Analyzing trace with hash 818867642, now seen corresponding path program 1 times [2023-04-03 01:54:03,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:03,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639604720] [2023-04-03 01:54:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:03,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:54:04,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:04,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639604720] [2023-04-03 01:54:04,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639604720] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:04,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:04,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:54:04,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770773361] [2023-04-03 01:54:04,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:04,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:54:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:04,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:54:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:54:04,157 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-03 01:54:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:04,505 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2023-04-03 01:54:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:54:04,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45 [2023-04-03 01:54:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:04,509 INFO L225 Difference]: With dead ends: 146 [2023-04-03 01:54:04,509 INFO L226 Difference]: Without dead ends: 107 [2023-04-03 01:54:04,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:54:04,516 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 80 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:04,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 120 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:54:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-03 01:54:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2023-04-03 01:54:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.125) internal successors, (45), 41 states have internal predecessors, (45), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-03 01:54:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2023-04-03 01:54:04,544 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 45 [2023-04-03 01:54:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:04,544 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2023-04-03 01:54:04,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-03 01:54:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2023-04-03 01:54:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 01:54:04,545 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:04,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:54:04,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:54:04,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:04,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1782419928, now seen corresponding path program 1 times [2023-04-03 01:54:04,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:04,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477978201] [2023-04-03 01:54:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:04,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:54:07,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:07,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477978201] [2023-04-03 01:54:07,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477978201] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:07,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:07,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-03 01:54:07,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680711669] [2023-04-03 01:54:07,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:07,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-03 01:54:07,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:07,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-03 01:54:07,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-04-03 01:54:07,265 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 27 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 10 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-03 01:54:08,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:08,388 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2023-04-03 01:54:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-03 01:54:08,389 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 10 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 45 [2023-04-03 01:54:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:08,390 INFO L225 Difference]: With dead ends: 146 [2023-04-03 01:54:08,390 INFO L226 Difference]: Without dead ends: 107 [2023-04-03 01:54:08,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 01:54:08,392 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 438 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:08,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 173 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:54:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-03 01:54:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2023-04-03 01:54:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-03 01:54:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2023-04-03 01:54:08,416 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 45 [2023-04-03 01:54:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:08,417 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2023-04-03 01:54:08,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 10 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-03 01:54:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2023-04-03 01:54:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-03 01:54:08,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:08,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:54:08,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:54:08,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:08,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:08,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1832882895, now seen corresponding path program 1 times [2023-04-03 01:54:08,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:08,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164910205] [2023-04-03 01:54:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:08,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:54:09,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:09,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164910205] [2023-04-03 01:54:09,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164910205] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:09,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:09,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 01:54:09,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936424739] [2023-04-03 01:54:09,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:54:09,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:09,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:54:09,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:54:09,635 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-03 01:54:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:09,902 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2023-04-03 01:54:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 01:54:09,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 46 [2023-04-03 01:54:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:09,907 INFO L225 Difference]: With dead ends: 119 [2023-04-03 01:54:09,907 INFO L226 Difference]: Without dead ends: 117 [2023-04-03 01:54:09,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-03 01:54:09,913 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:09,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 614 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:54:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-03 01:54:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2023-04-03 01:54:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 20 states have call successors, (20), 20 states have call predecessors, (20), 20 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2023-04-03 01:54:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2023-04-03 01:54:09,955 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 46 [2023-04-03 01:54:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:09,956 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2023-04-03 01:54:09,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-03 01:54:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2023-04-03 01:54:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 01:54:09,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:09,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:54:09,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:54:09,964 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:09,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1405053580, now seen corresponding path program 1 times [2023-04-03 01:54:09,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:09,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520311044] [2023-04-03 01:54:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:54:22,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:22,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520311044] [2023-04-03 01:54:22,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520311044] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:54:22,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049601436] [2023-04-03 01:54:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:22,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:54:22,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:54:22,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:54:22,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:54:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:22,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 197 conjunts are in the unsatisfiable core [2023-04-03 01:54:22,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:55:08,188 WARN L223 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 168 DAG size of output: 138 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne)