/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:32:13,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:32:13,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:32:13,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:32:13,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:32:13,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:32:13,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:32:13,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:32:13,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:32:13,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:32:13,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:32:13,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:32:13,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:32:13,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:32:13,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:32:13,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:32:13,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:32:13,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:32:13,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:32:13,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:32:13,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:32:13,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:32:13,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:32:13,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:32:13,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-03 02:32:13,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:32:13,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:32:13,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:32:13,965 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 02:32:13,988 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:32:13,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:32:13,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:32:13,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:32:13,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:32:13,990 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:32:13,990 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:32:13,990 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:32:13,990 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:32:13,990 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:32:13,991 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:32:13,991 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:32:13,991 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:32:13,991 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:32:13,991 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:32:13,991 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:32:13,992 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:32:13,992 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:32:13,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:32:13,992 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:32:13,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:32:13,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:32:13,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:32:13,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:32:13,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:32:13,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:32:13,993 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:32:13,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:32:13,994 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:32:13,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:32:13,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:32:13,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:32:13,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:32:13,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:32:13,995 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:32:13,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:32:13,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:32:13,995 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:32:13,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:32:13,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:32:13,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:32:13,995 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:32:14,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:32:14,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:32:14,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:32:14,237 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:32:14,237 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:32:14,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:32:15,372 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:32:15,578 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:32:15,579 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:32:15,586 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/299c792c2/6b3fbd991f0947f29df4c590d0ab84fb/FLAG1c05df59e [2023-04-03 02:32:15,599 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/299c792c2/6b3fbd991f0947f29df4c590d0ab84fb [2023-04-03 02:32:15,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:32:15,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:32:15,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:32:15,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:32:15,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:32:15,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6361fa0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15, skipping insertion in model container [2023-04-03 02:32:15,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:32:15,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:32:15,843 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.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2023-04-03 02:32:15,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:32:15,882 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:32:15,907 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.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2023-04-03 02:32:15,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:32:15,934 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:32:15,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15 WrapperNode [2023-04-03 02:32:15,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:32:15,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:32:15,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:32:15,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:32:15,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,970 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:32:15,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:32:15,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:32:15,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:32:15,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15" (1/1) ... [2023-04-03 02:32:15,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:32:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:32:16,022 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 02:32:16,027 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 02:32:16,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:32:16,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:32:16,056 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:32:16,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:32:16,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:32:16,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:32:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:32:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:32:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:32:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:32:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:32:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:32:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:32:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:32:16,057 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:32:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:32:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:32:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:32:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:32:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:32:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:32:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:32:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:32:16,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:32:16,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:32:16,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:32:16,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:32:16,169 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:32:16,171 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:32:16,568 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:32:16,681 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:32:16,681 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:32:16,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:32:16 BoogieIcfgContainer [2023-04-03 02:32:16,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:32:16,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:32:16,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:32:16,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:32:16,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:32:15" (1/3) ... [2023-04-03 02:32:16,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dfbf62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:32:16, skipping insertion in model container [2023-04-03 02:32:16,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:32:15" (2/3) ... [2023-04-03 02:32:16,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dfbf62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:32:16, skipping insertion in model container [2023-04-03 02:32:16,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:32:16" (3/3) ... [2023-04-03 02:32:16,695 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:32:16,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:32:16,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:32:16,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:32:16,769 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;@26578e37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:32:16,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:32:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 60 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:32:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-03 02:32:16,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:16,780 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] [2023-04-03 02:32:16,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:16,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:16,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1812862276, now seen corresponding path program 1 times [2023-04-03 02:32:16,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:16,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254040842] [2023-04-03 02:32:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:16,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:17,142 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 02:32:17,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:17,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254040842] [2023-04-03 02:32:17,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254040842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:17,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:17,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:17,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106880597] [2023-04-03 02:32:17,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:17,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:17,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:17,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:17,181 INFO L87 Difference]: Start difference. First operand has 65 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 60 states have internal predecessors, (98), 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 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:17,259 INFO L93 Difference]: Finished difference Result 143 states and 215 transitions. [2023-04-03 02:32:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2023-04-03 02:32:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:17,269 INFO L225 Difference]: With dead ends: 143 [2023-04-03 02:32:17,269 INFO L226 Difference]: Without dead ends: 93 [2023-04-03 02:32:17,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:17,274 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 71 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:17,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 196 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-03 02:32:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2023-04-03 02:32:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.3908045977011494) internal successors, (121), 87 states have internal predecessors, (121), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2023-04-03 02:32:17,312 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 32 [2023-04-03 02:32:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:17,312 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2023-04-03 02:32:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2023-04-03 02:32:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-03 02:32:17,314 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:17,314 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] [2023-04-03 02:32:17,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:32:17,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:17,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash 247058356, now seen corresponding path program 1 times [2023-04-03 02:32:17,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:17,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872157229] [2023-04-03 02:32:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:17,409 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 02:32:17,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:17,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872157229] [2023-04-03 02:32:17,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872157229] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:17,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:17,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:17,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057911776] [2023-04-03 02:32:17,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:17,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:17,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:17,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:17,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:17,414 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:17,469 INFO L93 Difference]: Finished difference Result 205 states and 292 transitions. [2023-04-03 02:32:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:17,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2023-04-03 02:32:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:17,472 INFO L225 Difference]: With dead ends: 205 [2023-04-03 02:32:17,472 INFO L226 Difference]: Without dead ends: 137 [2023-04-03 02:32:17,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:17,474 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 51 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:17,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 139 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-04-03 02:32:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2023-04-03 02:32:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.4122137404580153) internal successors, (185), 131 states have internal predecessors, (185), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 188 transitions. [2023-04-03 02:32:17,503 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 188 transitions. Word has length 34 [2023-04-03 02:32:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:17,504 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 188 transitions. [2023-04-03 02:32:17,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 188 transitions. [2023-04-03 02:32:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-03 02:32:17,505 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:17,505 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] [2023-04-03 02:32:17,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:32:17,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:17,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash 231137967, now seen corresponding path program 1 times [2023-04-03 02:32:17,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:17,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556966487] [2023-04-03 02:32:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:17,617 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 02:32:17,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:17,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556966487] [2023-04-03 02:32:17,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556966487] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:17,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:17,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:17,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650261520] [2023-04-03 02:32:17,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:17,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:17,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:17,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:17,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:17,620 INFO L87 Difference]: Start difference. First operand 135 states and 188 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:17,676 INFO L93 Difference]: Finished difference Result 315 states and 450 transitions. [2023-04-03 02:32:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 37 [2023-04-03 02:32:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:17,680 INFO L225 Difference]: With dead ends: 315 [2023-04-03 02:32:17,680 INFO L226 Difference]: Without dead ends: 203 [2023-04-03 02:32:17,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:17,682 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 46 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:17,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 124 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:17,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-04-03 02:32:17,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2023-04-03 02:32:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.4060913705583757) internal successors, (277), 197 states have internal predecessors, (277), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 280 transitions. [2023-04-03 02:32:17,721 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 280 transitions. Word has length 37 [2023-04-03 02:32:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:17,721 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 280 transitions. [2023-04-03 02:32:17,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 280 transitions. [2023-04-03 02:32:17,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-03 02:32:17,722 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:17,723 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] [2023-04-03 02:32:17,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:32:17,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:17,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:17,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1005505411, now seen corresponding path program 1 times [2023-04-03 02:32:17,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:17,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461549251] [2023-04-03 02:32:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:17,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:17,920 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 02:32:17,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:17,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461549251] [2023-04-03 02:32:17,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461549251] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:17,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:17,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:32:17,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913640239] [2023-04-03 02:32:17,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:17,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:32:17,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:17,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:32:17,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:32:17,924 INFO L87 Difference]: Start difference. First operand 201 states and 280 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:18,090 INFO L93 Difference]: Finished difference Result 647 states and 915 transitions. [2023-04-03 02:32:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:32:18,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 40 [2023-04-03 02:32:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:18,095 INFO L225 Difference]: With dead ends: 647 [2023-04-03 02:32:18,095 INFO L226 Difference]: Without dead ends: 469 [2023-04-03 02:32:18,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:32:18,107 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 132 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:18,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 195 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-04-03 02:32:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 465. [2023-04-03 02:32:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.4078091106290673) internal successors, (649), 461 states have internal predecessors, (649), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 652 transitions. [2023-04-03 02:32:18,250 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 652 transitions. Word has length 40 [2023-04-03 02:32:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:18,252 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 652 transitions. [2023-04-03 02:32:18,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 652 transitions. [2023-04-03 02:32:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 02:32:18,259 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:18,260 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] [2023-04-03 02:32:18,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:32:18,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:18,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash -3421146, now seen corresponding path program 1 times [2023-04-03 02:32:18,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:18,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257028685] [2023-04-03 02:32:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:18,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:18,411 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 02:32:18,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:18,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257028685] [2023-04-03 02:32:18,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257028685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:18,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:18,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:32:18,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465201096] [2023-04-03 02:32:18,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:18,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:32:18,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:18,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:32:18,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:32:18,415 INFO L87 Difference]: Start difference. First operand 465 states and 652 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:18,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:18,692 INFO L93 Difference]: Finished difference Result 1190 states and 1692 transitions. [2023-04-03 02:32:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:32:18,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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 42 [2023-04-03 02:32:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:18,701 INFO L225 Difference]: With dead ends: 1190 [2023-04-03 02:32:18,701 INFO L226 Difference]: Without dead ends: 748 [2023-04-03 02:32:18,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:32:18,707 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 286 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:18,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 89 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:18,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-04-03 02:32:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2023-04-03 02:32:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 742 states have (on average 1.4056603773584906) internal successors, (1043), 742 states have internal predecessors, (1043), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1046 transitions. [2023-04-03 02:32:18,907 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1046 transitions. Word has length 42 [2023-04-03 02:32:18,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:18,907 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1046 transitions. [2023-04-03 02:32:18,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1046 transitions. [2023-04-03 02:32:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 02:32:18,910 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:18,910 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] [2023-04-03 02:32:18,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:32:18,910 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:18,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:18,911 INFO L85 PathProgramCache]: Analyzing trace with hash -190787509, now seen corresponding path program 1 times [2023-04-03 02:32:18,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:18,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772602146] [2023-04-03 02:32:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:18,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:19,324 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 02:32:19,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:19,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772602146] [2023-04-03 02:32:19,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772602146] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:19,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:19,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:32:19,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144875771] [2023-04-03 02:32:19,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:19,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:32:19,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:19,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:32:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:32:19,327 INFO L87 Difference]: Start difference. First operand 746 states and 1046 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:19,780 INFO L93 Difference]: Finished difference Result 1575 states and 2232 transitions. [2023-04-03 02:32:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:32:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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 42 [2023-04-03 02:32:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:19,788 INFO L225 Difference]: With dead ends: 1575 [2023-04-03 02:32:19,788 INFO L226 Difference]: Without dead ends: 1573 [2023-04-03 02:32:19,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:32:19,791 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 332 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:19,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 806 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2023-04-03 02:32:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 857. [2023-04-03 02:32:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 853 states have (on average 1.4044548651817117) internal successors, (1198), 853 states have internal predecessors, (1198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1201 transitions. [2023-04-03 02:32:19,967 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1201 transitions. Word has length 42 [2023-04-03 02:32:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:19,968 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1201 transitions. [2023-04-03 02:32:19,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1201 transitions. [2023-04-03 02:32:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-03 02:32:19,970 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:19,970 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:32:19,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:32:19,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:19,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash 193436074, now seen corresponding path program 1 times [2023-04-03 02:32:19,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:19,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833826463] [2023-04-03 02:32:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:19,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:20,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833826463] [2023-04-03 02:32:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833826463] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:32:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625189032] [2023-04-03 02:32:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:20,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:32:20,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:32:20,949 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 02:32:20,972 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 02:32:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:21,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-03 02:32:21,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:32:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:22,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:32:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:25,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625189032] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:32:25,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [553407507] [2023-04-03 02:32:25,295 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-04-03 02:32:25,295 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:32:25,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:32:25,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:32:25,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:32:25,919 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 120 for LOIs [2023-04-03 02:32:48,782 WARN L223 SmtUtils]: Spent 20.88s on a formula simplification. DAG size of input: 6195 DAG size of output: 269 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:32:54,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 103 for LOIs [2023-04-03 02:32:54,516 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:33:03,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10966#(and (= ~nomsg~0 ~p1_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (= main_~main__c1~0 0) (= main_~__tmp_1~0 0) (= ~nomsg~0 ~p2_new~0) (= ~nomsg~0 ~p1_old~0) (<= ~mode1~0 1) (or (< 1 (+ ~st3~0 ~st2~0 ~st1~0)) (and (<= 3 ~r1~0) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (= ~p3_old~0 ~nomsg~0) (= ~__return_6163~0 main_~check__tmp~0) (<= 0 ~mode2~0) (= main_~main__c1~0 ~__return_6163~0) (= main_~__tmp_1~0 main_~assert__arg~0))' at error location [2023-04-03 02:33:03,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 02:33:03,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:33:03,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 41 [2023-04-03 02:33:03,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825248872] [2023-04-03 02:33:03,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 02:33:03,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-03 02:33:03,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-03 02:33:03,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=5611, Unknown=0, NotChecked=0, Total=6480 [2023-04-03 02:33:03,162 INFO L87 Difference]: Start difference. First operand 857 states and 1201 transitions. Second operand has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:33:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:25,572 INFO L93 Difference]: Finished difference Result 9033 states and 12671 transitions. [2023-04-03 02:33:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2023-04-03 02:33:25,577 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2023-04-03 02:33:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:25,609 INFO L225 Difference]: With dead ends: 9033 [2023-04-03 02:33:25,609 INFO L226 Difference]: Without dead ends: 7762 [2023-04-03 02:33:25,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24242 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=8429, Invalid=48931, Unknown=0, NotChecked=0, Total=57360 [2023-04-03 02:33:25,628 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 5622 mSDsluCounter, 2807 mSDsCounter, 0 mSdLazyCounter, 4369 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5622 SdHoareTripleChecker+Valid, 2950 SdHoareTripleChecker+Invalid, 4692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 4369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:25,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5622 Valid, 2950 Invalid, 4692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 4369 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-03 02:33:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2023-04-03 02:33:26,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 4092. [2023-04-03 02:33:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4088 states have (on average 1.3649706457925637) internal successors, (5580), 4088 states have internal predecessors, (5580), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 5583 transitions. [2023-04-03 02:33:26,881 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 5583 transitions. Word has length 50 [2023-04-03 02:33:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:26,884 INFO L495 AbstractCegarLoop]: Abstraction has 4092 states and 5583 transitions. [2023-04-03 02:33:26,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:33:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 5583 transitions. [2023-04-03 02:33:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-03 02:33:26,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:26,887 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:33:26,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 02:33:27,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:33:27,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:27,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1612983117, now seen corresponding path program 1 times [2023-04-03 02:33:27,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:27,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485603487] [2023-04-03 02:33:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:33:27,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:27,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485603487] [2023-04-03 02:33:27,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485603487] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:27,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:27,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:33:27,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584415311] [2023-04-03 02:33:27,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:27,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:33:27,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:27,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:33:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:33:27,194 INFO L87 Difference]: Start difference. First operand 4092 states and 5583 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:28,869 INFO L93 Difference]: Finished difference Result 10042 states and 13798 transitions. [2023-04-03 02:33:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:33:28,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 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 50 [2023-04-03 02:33:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:28,890 INFO L225 Difference]: With dead ends: 10042 [2023-04-03 02:33:28,890 INFO L226 Difference]: Without dead ends: 6021 [2023-04-03 02:33:28,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:33:28,926 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 265 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:28,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 99 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:33:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6021 states. [2023-04-03 02:33:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6021 to 5947. [2023-04-03 02:33:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5947 states, 5943 states have (on average 1.36479892310281) internal successors, (8111), 5943 states have internal predecessors, (8111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5947 states to 5947 states and 8114 transitions. [2023-04-03 02:33:30,773 INFO L78 Accepts]: Start accepts. Automaton has 5947 states and 8114 transitions. Word has length 50 [2023-04-03 02:33:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:30,775 INFO L495 AbstractCegarLoop]: Abstraction has 5947 states and 8114 transitions. [2023-04-03 02:33:30,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5947 states and 8114 transitions. [2023-04-03 02:33:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-03 02:33:30,776 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:30,776 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:33:30,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:33:30,776 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:30,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash 13181550, now seen corresponding path program 1 times [2023-04-03 02:33:30,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:30,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180541614] [2023-04-03 02:33:30,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:30,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:31,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:31,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180541614] [2023-04-03 02:33:31,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180541614] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:33:31,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674623049] [2023-04-03 02:33:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:31,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:33:31,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:33:31,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:33:31,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:33:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:31,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-03 02:33:31,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:33:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:32,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:33:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:35,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674623049] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:33:35,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128291977] [2023-04-03 02:33:35,652 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-04-03 02:33:35,652 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:33:35,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:33:35,652 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:33:35,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:33:36,003 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 120 for LOIs [2023-04-03 02:33:57,849 WARN L223 SmtUtils]: Spent 20.65s on a formula simplification. DAG size of input: 6093 DAG size of output: 237 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:34:20,662 WARN L223 SmtUtils]: Spent 22.03s on a formula simplification. DAG size of input: 6400 DAG size of output: 281 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:34:48,851 WARN L223 SmtUtils]: Spent 27.35s on a formula simplification. DAG size of input: 7001 DAG size of output: 293 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:35:03,088 WARN L223 SmtUtils]: Spent 14.04s on a formula simplification. DAG size of input: 5352 DAG size of output: 363 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:35:09,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 103 for LOIs [2023-04-03 02:35:09,578 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:35:18,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59066#(and (= ~nomsg~0 ~p1_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (= ~nomsg~0 ~p2_old~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (= main_~main__c1~0 0) (= main_~__tmp_1~0 0) (= ~nomsg~0 ~p2_new~0) (= ~nomsg~0 ~p1_old~0) (<= ~mode1~0 1) (or (< 1 (+ ~st3~0 ~st2~0 ~st1~0)) (and (<= 3 ~r1~0) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (= ~__return_6163~0 main_~check__tmp~0) (<= 0 ~mode2~0) (= main_~main__c1~0 ~__return_6163~0) (= main_~__tmp_1~0 main_~assert__arg~0))' at error location [2023-04-03 02:35:18,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 02:35:18,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:35:18,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 41 [2023-04-03 02:35:18,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629002068] [2023-04-03 02:35:18,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 02:35:18,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-03 02:35:18,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-03 02:35:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=5633, Unknown=0, NotChecked=0, Total=6480 [2023-04-03 02:35:18,014 INFO L87 Difference]: Start difference. First operand 5947 states and 8114 transitions. Second operand has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:35:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:50,292 INFO L93 Difference]: Finished difference Result 31947 states and 43493 transitions. [2023-04-03 02:35:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-04-03 02:35:50,293 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2023-04-03 02:35:50,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:50,379 INFO L225 Difference]: With dead ends: 31947 [2023-04-03 02:35:50,379 INFO L226 Difference]: Without dead ends: 27537 [2023-04-03 02:35:50,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31738 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=12170, Invalid=61542, Unknown=0, NotChecked=0, Total=73712 [2023-04-03 02:35:50,404 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 5892 mSDsluCounter, 2792 mSDsCounter, 0 mSdLazyCounter, 4290 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5892 SdHoareTripleChecker+Valid, 2943 SdHoareTripleChecker+Invalid, 4694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 4290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:50,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5892 Valid, 2943 Invalid, 4694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 4290 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-03 02:35:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27537 states. [2023-04-03 02:35:55,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27537 to 16553. [2023-04-03 02:35:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16553 states, 16549 states have (on average 1.35851108828328) internal successors, (22482), 16549 states have internal predecessors, (22482), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16553 states to 16553 states and 22485 transitions. [2023-04-03 02:35:55,535 INFO L78 Accepts]: Start accepts. Automaton has 16553 states and 22485 transitions. Word has length 50 [2023-04-03 02:35:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:55,536 INFO L495 AbstractCegarLoop]: Abstraction has 16553 states and 22485 transitions. [2023-04-03 02:35:55,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:35:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 16553 states and 22485 transitions. [2023-04-03 02:35:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:35:55,538 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:55,538 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:35:55,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 02:35:55,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-03 02:35:55,747 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:55,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1774217561, now seen corresponding path program 1 times [2023-04-03 02:35:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:55,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920153619] [2023-04-03 02:35:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:55,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:35:55,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:55,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920153619] [2023-04-03 02:35:55,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920153619] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:55,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:55,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:35:55,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493794987] [2023-04-03 02:35:55,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:55,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:35:55,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:55,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:35:55,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:55,830 INFO L87 Difference]: Start difference. First operand 16553 states and 22485 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:01,503 INFO L93 Difference]: Finished difference Result 33234 states and 45263 transitions. [2023-04-03 02:36:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:36:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 53 [2023-04-03 02:36:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:01,550 INFO L225 Difference]: With dead ends: 33234 [2023-04-03 02:36:01,550 INFO L226 Difference]: Without dead ends: 17092 [2023-04-03 02:36:01,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:36:01,584 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 283 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:01,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 88 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:36:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17092 states. [2023-04-03 02:36:06,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17092 to 17090. [2023-04-03 02:36:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17090 states, 17086 states have (on average 1.3497600374575676) internal successors, (23062), 17086 states have internal predecessors, (23062), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17090 states to 17090 states and 23065 transitions. [2023-04-03 02:36:06,943 INFO L78 Accepts]: Start accepts. Automaton has 17090 states and 23065 transitions. Word has length 53 [2023-04-03 02:36:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:06,943 INFO L495 AbstractCegarLoop]: Abstraction has 17090 states and 23065 transitions. [2023-04-03 02:36:06,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 17090 states and 23065 transitions. [2023-04-03 02:36:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:36:06,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:06,946 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:36:06,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:36:06,946 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:06,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:06,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1909978772, now seen corresponding path program 1 times [2023-04-03 02:36:06,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:06,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163736779] [2023-04-03 02:36:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:06,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:07,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:07,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163736779] [2023-04-03 02:36:07,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163736779] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:36:07,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528379552] [2023-04-03 02:36:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:07,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:36:07,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:36:07,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:36:07,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:36:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:07,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-03 02:36:07,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:36:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:08,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:36:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:11,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528379552] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:36:11,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946206338] [2023-04-03 02:36:11,751 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-04-03 02:36:11,751 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:36:11,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:36:11,752 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:36:11,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:36:11,999 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 120 for LOIs