/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:38:26,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:38:26,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:38:26,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:38:26,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:38:26,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:38:26,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:38:26,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:38:26,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:38:26,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:38:26,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:38:26,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:38:26,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:38:26,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:38:26,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:38:26,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:38:26,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:38:26,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:38:26,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:38:26,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:38:26,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:38:26,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:38:26,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:38:26,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:38:26,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:38:26,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:38:26,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:38:26,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:38:26,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:38:26,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:38:26,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:38:26,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:38:26,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:38:26,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:38:26,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:38:26,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:38:26,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:38:26,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:38:26,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:38:26,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:38:26,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:38:26,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:38:26,859 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:38:26,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:38:26,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:38:26,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:38:26,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:38:26,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:38:26,860 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:38:26,860 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:38:26,860 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:38:26,860 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:38:26,861 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:38:26,861 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:38:26,861 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:38:26,861 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:38:26,861 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:38:26,862 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:38:26,862 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:38:26,862 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:38:26,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:38:26,862 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:38:26,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:38:26,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:38:26,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:38:26,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:38:26,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:38:26,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:38:26,863 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:38:26,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:38:26,863 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:38:26,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:38:26,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:38:26,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:38:26,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:38:26,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:38:26,864 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:38:26,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:38:26,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:38:26,864 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:38:26,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:38:26,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:38:26,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:38:26,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:38:27,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:38:27,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:38:27,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:38:27,064 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:38:27,064 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:38:27,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 12:38:28,065 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:38:28,201 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:38:28,201 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 12:38:28,208 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f837c9430/4c63126a173e44d49415f6e3978fbaa4/FLAG8b7159e7a [2023-04-01 12:38:28,219 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f837c9430/4c63126a173e44d49415f6e3978fbaa4 [2023-04-01 12:38:28,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:38:28,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:38:28,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:38:28,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:38:28,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:38:28,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590c7368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28, skipping insertion in model container [2023-04-01 12:38:28,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:38:28,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:38:28,382 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5339,5352] [2023-04-01 12:38:28,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:38:28,443 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:38:28,482 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5339,5352] [2023-04-01 12:38:28,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:38:28,531 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:38:28,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28 WrapperNode [2023-04-01 12:38:28,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:38:28,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:38:28,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:38:28,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:38:28,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,582 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:38:28,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:38:28,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:38:28,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:38:28,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28" (1/1) ... [2023-04-01 12:38:28,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:38:28,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:38:28,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:38:28,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:38:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:38:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:38:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:38:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:38:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:38:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:38:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:38:28,793 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:38:28,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:38:29,231 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:38:29,364 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:38:29,365 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:38:29,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:38:29 BoogieIcfgContainer [2023-04-01 12:38:29,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:38:29,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:38:29,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:38:29,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:38:29,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:38:28" (1/3) ... [2023-04-01 12:38:29,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea8c252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:38:29, skipping insertion in model container [2023-04-01 12:38:29,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:28" (2/3) ... [2023-04-01 12:38:29,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea8c252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:38:29, skipping insertion in model container [2023-04-01 12:38:29,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:38:29" (3/3) ... [2023-04-01 12:38:29,373 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 12:38:29,390 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:38:29,390 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:38:29,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:38:29,427 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;@d09142f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:38:29,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:38:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 85 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:38:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 12:38:29,438 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:29,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:29,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:29,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:29,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1245326662, now seen corresponding path program 1 times [2023-04-01 12:38:29,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:29,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571471534] [2023-04-01 12:38:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:29,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:29,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:29,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571471534] [2023-04-01 12:38:29,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571471534] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:29,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:29,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:29,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294574089] [2023-04-01 12:38:29,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:29,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:29,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:29,781 INFO L87 Difference]: Start difference. First operand has 90 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 85 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:29,887 INFO L93 Difference]: Finished difference Result 199 states and 305 transitions. [2023-04-01 12:38:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:29,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-01 12:38:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:29,897 INFO L225 Difference]: With dead ends: 199 [2023-04-01 12:38:29,897 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 12:38:29,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:29,902 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 106 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:29,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 275 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 12:38:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-04-01 12:38:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.408) internal successors, (176), 125 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2023-04-01 12:38:29,957 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 41 [2023-04-01 12:38:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:29,957 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2023-04-01 12:38:29,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2023-04-01 12:38:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 12:38:29,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:29,959 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] [2023-04-01 12:38:29,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:38:29,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:29,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1703562877, now seen corresponding path program 1 times [2023-04-01 12:38:29,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:29,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083355338] [2023-04-01 12:38:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:29,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:30,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:30,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083355338] [2023-04-01 12:38:30,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083355338] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:30,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:30,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:30,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937777500] [2023-04-01 12:38:30,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:30,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:30,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:30,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:30,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:30,101 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:30,152 INFO L93 Difference]: Finished difference Result 305 states and 443 transitions. [2023-04-01 12:38:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:30,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-04-01 12:38:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:30,154 INFO L225 Difference]: With dead ends: 305 [2023-04-01 12:38:30,154 INFO L226 Difference]: Without dead ends: 206 [2023-04-01 12:38:30,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:30,156 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 78 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:30,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 219 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-04-01 12:38:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2023-04-01 12:38:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.44) internal successors, (288), 200 states have internal predecessors, (288), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 291 transitions. [2023-04-01 12:38:30,179 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 291 transitions. Word has length 44 [2023-04-01 12:38:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:30,180 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 291 transitions. [2023-04-01 12:38:30,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 291 transitions. [2023-04-01 12:38:30,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 12:38:30,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:30,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:30,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:38:30,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:30,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:30,182 INFO L85 PathProgramCache]: Analyzing trace with hash -826012535, now seen corresponding path program 1 times [2023-04-01 12:38:30,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:30,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456813708] [2023-04-01 12:38:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:30,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:30,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:30,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456813708] [2023-04-01 12:38:30,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456813708] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:30,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:30,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:30,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433130053] [2023-04-01 12:38:30,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:30,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:30,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:30,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:30,269 INFO L87 Difference]: Start difference. First operand 204 states and 291 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:30,335 INFO L93 Difference]: Finished difference Result 508 states and 745 transitions. [2023-04-01 12:38:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:30,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-01 12:38:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:30,341 INFO L225 Difference]: With dead ends: 508 [2023-04-01 12:38:30,341 INFO L226 Difference]: Without dead ends: 334 [2023-04-01 12:38:30,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:30,348 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 73 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:30,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 204 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-04-01 12:38:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2023-04-01 12:38:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 328 states have (on average 1.451219512195122) internal successors, (476), 328 states have internal predecessors, (476), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 479 transitions. [2023-04-01 12:38:30,404 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 479 transitions. Word has length 47 [2023-04-01 12:38:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:30,405 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 479 transitions. [2023-04-01 12:38:30,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 479 transitions. [2023-04-01 12:38:30,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 12:38:30,408 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:30,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:30,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:38:30,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:30,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:30,411 INFO L85 PathProgramCache]: Analyzing trace with hash 649159320, now seen corresponding path program 1 times [2023-04-01 12:38:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:30,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299007753] [2023-04-01 12:38:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:30,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:30,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:30,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299007753] [2023-04-01 12:38:30,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299007753] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:30,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:30,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:30,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625024827] [2023-04-01 12:38:30,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:30,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:30,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:30,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:30,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:30,540 INFO L87 Difference]: Start difference. First operand 332 states and 479 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:30,625 INFO L93 Difference]: Finished difference Result 848 states and 1241 transitions. [2023-04-01 12:38:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-01 12:38:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:30,629 INFO L225 Difference]: With dead ends: 848 [2023-04-01 12:38:30,629 INFO L226 Difference]: Without dead ends: 546 [2023-04-01 12:38:30,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:30,634 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 68 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:30,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 189 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-04-01 12:38:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2023-04-01 12:38:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 540 states have (on average 1.4444444444444444) internal successors, (780), 540 states have internal predecessors, (780), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 783 transitions. [2023-04-01 12:38:30,685 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 783 transitions. Word has length 50 [2023-04-01 12:38:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:30,685 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 783 transitions. [2023-04-01 12:38:30,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 783 transitions. [2023-04-01 12:38:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 12:38:30,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:30,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:30,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:38:30,690 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:30,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:30,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1827151653, now seen corresponding path program 1 times [2023-04-01 12:38:30,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:30,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049158890] [2023-04-01 12:38:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:30,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:30,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:30,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049158890] [2023-04-01 12:38:30,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049158890] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:30,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:30,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:38:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470766250] [2023-04-01 12:38:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:30,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:38:30,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:30,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:38:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:38:30,846 INFO L87 Difference]: Start difference. First operand 544 states and 783 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:31,229 INFO L93 Difference]: Finished difference Result 2248 states and 3251 transitions. [2023-04-01 12:38:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:38:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 12:38:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:31,239 INFO L225 Difference]: With dead ends: 2248 [2023-04-01 12:38:31,239 INFO L226 Difference]: Without dead ends: 1734 [2023-04-01 12:38:31,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:38:31,242 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 285 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:31,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 393 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2023-04-01 12:38:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1728. [2023-04-01 12:38:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1724 states have (on average 1.4408352668213458) internal successors, (2484), 1724 states have internal predecessors, (2484), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2487 transitions. [2023-04-01 12:38:31,492 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2487 transitions. Word has length 53 [2023-04-01 12:38:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:31,493 INFO L495 AbstractCegarLoop]: Abstraction has 1728 states and 2487 transitions. [2023-04-01 12:38:31,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2487 transitions. [2023-04-01 12:38:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:38:31,495 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:31,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:31,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:38:31,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:31,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:31,497 INFO L85 PathProgramCache]: Analyzing trace with hash -274295076, now seen corresponding path program 1 times [2023-04-01 12:38:31,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:31,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611631857] [2023-04-01 12:38:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:31,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:31,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:31,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611631857] [2023-04-01 12:38:31,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611631857] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:31,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:31,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:31,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312538510] [2023-04-01 12:38:31,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:31,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:31,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:31,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:31,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:31,606 INFO L87 Difference]: Start difference. First operand 1728 states and 2487 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:32,075 INFO L93 Difference]: Finished difference Result 4434 states and 6429 transitions. [2023-04-01 12:38:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:32,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 12:38:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:32,084 INFO L225 Difference]: With dead ends: 4434 [2023-04-01 12:38:32,084 INFO L226 Difference]: Without dead ends: 2736 [2023-04-01 12:38:32,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:32,088 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 437 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:32,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 123 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:32,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2023-04-01 12:38:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2734. [2023-04-01 12:38:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2730 states have (on average 1.435897435897436) internal successors, (3920), 2730 states have internal predecessors, (3920), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3923 transitions. [2023-04-01 12:38:32,451 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3923 transitions. Word has length 55 [2023-04-01 12:38:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:32,451 INFO L495 AbstractCegarLoop]: Abstraction has 2734 states and 3923 transitions. [2023-04-01 12:38:32,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:32,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3923 transitions. [2023-04-01 12:38:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:38:32,452 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:32,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:32,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:38:32,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:32,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:32,453 INFO L85 PathProgramCache]: Analyzing trace with hash -898145833, now seen corresponding path program 1 times [2023-04-01 12:38:32,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:32,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184517189] [2023-04-01 12:38:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:32,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:32,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184517189] [2023-04-01 12:38:32,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184517189] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:32,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:32,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:38:32,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863472696] [2023-04-01 12:38:32,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:32,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:38:32,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:38:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:38:32,781 INFO L87 Difference]: Start difference. First operand 2734 states and 3923 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:33,659 INFO L93 Difference]: Finished difference Result 5934 states and 8601 transitions. [2023-04-01 12:38:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:38:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 12:38:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:33,678 INFO L225 Difference]: With dead ends: 5934 [2023-04-01 12:38:33,678 INFO L226 Difference]: Without dead ends: 5932 [2023-04-01 12:38:33,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:38:33,684 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 839 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:33,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 1377 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:33,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2023-04-01 12:38:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 2965. [2023-04-01 12:38:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2961 states have (on average 1.4363390746369469) internal successors, (4253), 2961 states have internal predecessors, (4253), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 4256 transitions. [2023-04-01 12:38:34,123 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 4256 transitions. Word has length 55 [2023-04-01 12:38:34,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:34,123 INFO L495 AbstractCegarLoop]: Abstraction has 2965 states and 4256 transitions. [2023-04-01 12:38:34,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:38:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 4256 transitions. [2023-04-01 12:38:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 12:38:34,125 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:34,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:34,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:38:34,125 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:34,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:34,125 INFO L85 PathProgramCache]: Analyzing trace with hash 831245271, now seen corresponding path program 1 times [2023-04-01 12:38:34,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:34,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250322721] [2023-04-01 12:38:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:34,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:35,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:35,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250322721] [2023-04-01 12:38:35,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250322721] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:38:35,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740313450] [2023-04-01 12:38:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:35,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:38:35,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:38:35,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:38:35,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:38:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:35,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-01 12:38:35,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:38:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:36,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:38:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:38:42,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740313450] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:38:42,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1177779219] [2023-04-01 12:38:42,658 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-04-01 12:38:42,658 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:38:42,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:38:42,664 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:38:42,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:38:43,852 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 184 for LOIs [2023-04-01 12:38:56,607 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 12:38:57,200 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:38:57,807 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:38:58,395 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:38:58,944 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:38:59,488 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:39:00,096 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:39:00,640 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:39:01,178 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:39:13,626 WARN L223 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 492 DAG size of output: 507 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)