/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:50:23,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:50:23,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:50:23,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:50:23,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:50:23,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:50:23,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:50:23,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:50:23,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:50:23,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:50:23,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:50:23,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:50:23,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:50:23,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:50:23,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:50:23,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:50:23,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:50:23,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:50:23,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:50:23,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:50:23,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:50:23,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:50:23,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:50:23,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:50:23,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:50:23,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:50:23,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:50:23,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:50:23,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:50:23,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:50:23,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:50:23,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:50:23,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:50:23,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:50:23,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:50:23,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:50:23,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:50:23,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:50:23,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:50:23,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:50:24,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:50:24,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:50:24,026 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:50:24,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:50:24,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:50:24,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:50:24,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:50:24,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:50:24,027 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:50:24,027 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:50:24,027 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:50:24,027 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:50:24,027 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:50:24,027 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:50:24,027 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:50:24,027 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:50:24,027 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:50:24,027 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:50:24,028 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:50:24,028 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:50:24,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:50:24,028 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:50:24,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:50:24,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:50:24,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:50:24,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:50:24,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:50:24,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:50:24,029 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:50:24,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:50:24,029 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:50:24,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:50:24,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:50:24,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:50:24,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:50:24,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:50:24,029 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:50:24,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:50:24,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:50:24,030 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:50:24,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:50:24,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:50:24,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:50:24,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:50:24,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:50:24,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:50:24,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:50:24,212 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:50:24,213 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:50:24,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2023-04-03 01:50:25,240 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:50:25,408 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:50:25,408 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2023-04-03 01:50:25,414 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fefe0f37/ff5ad1e62b5f4d408473e81452db9dc6/FLAG5eea5115b [2023-04-03 01:50:25,422 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fefe0f37/ff5ad1e62b5f4d408473e81452db9dc6 [2023-04-03 01:50:25,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:50:25,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:50:25,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:50:25,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:50:25,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:50:25,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f72c0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25, skipping insertion in model container [2023-04-03 01:50:25,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:50:25,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:50:25,587 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c[8209,8222] [2023-04-03 01:50:25,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:50:25,598 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:50:25,632 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c[8209,8222] [2023-04-03 01:50:25,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:50:25,642 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:50:25,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25 WrapperNode [2023-04-03 01:50:25,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:50:25,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:50:25,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:50:25,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:50:25,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,666 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:50:25,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:50:25,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:50:25,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:50:25,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25" (1/1) ... [2023-04-03 01:50:25,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:50:25,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:50:25,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:50:25,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:50:25,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:50:25,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:50:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:50:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:50:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:50:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:50:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 01:50:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:50:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:50:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:50:25,716 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:50:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:50:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:50:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:50:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:50:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:50:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:50:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:50:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:50:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:50:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:50:25,776 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:50:25,778 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:50:26,161 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:50:26,400 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:50:26,401 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:50:26,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:50:26 BoogieIcfgContainer [2023-04-03 01:50:26,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:50:26,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:50:26,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:50:26,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:50:26,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:50:25" (1/3) ... [2023-04-03 01:50:26,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf94c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:50:26, skipping insertion in model container [2023-04-03 01:50:26,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:50:25" (2/3) ... [2023-04-03 01:50:26,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf94c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:50:26, skipping insertion in model container [2023-04-03 01:50:26,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:50:26" (3/3) ... [2023-04-03 01:50:26,412 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c [2023-04-03 01:50:26,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:50:26,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:50:26,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:50:26,463 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;@603cdad1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:50:26,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:50:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 01:50:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-03 01:50:26,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:50:26,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:50:26,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:50:26,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:50:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1679856410, now seen corresponding path program 1 times [2023-04-03 01:50:26,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:50:26,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691205174] [2023-04-03 01:50:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:50:26,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:50:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:50:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:50:28,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:50:28,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691205174] [2023-04-03 01:50:28,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691205174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:50:28,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:50:28,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 01:50:28,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113454533] [2023-04-03 01:50:28,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:50:28,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 01:50:28,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:50:28,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 01:50:28,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-04-03 01:50:28,352 INFO L87 Difference]: Start difference. First operand has 43 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 8 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-03 01:50:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:50:29,234 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2023-04-03 01:50:29,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-03 01:50:29,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 8 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 33 [2023-04-03 01:50:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:50:29,241 INFO L225 Difference]: With dead ends: 134 [2023-04-03 01:50:29,241 INFO L226 Difference]: Without dead ends: 88 [2023-04-03 01:50:29,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=1362, Unknown=0, NotChecked=0, Total=1722 [2023-04-03 01:50:29,245 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 441 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:50:29,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 105 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:50:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-03 01:50:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2023-04-03 01:50:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-03 01:50:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-04-03 01:50:29,279 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 33 [2023-04-03 01:50:29,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:50:29,280 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-04-03 01:50:29,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 8 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-03 01:50:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-04-03 01:50:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 01:50:29,281 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:50:29,281 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] [2023-04-03 01:50:29,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:50:29,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:50:29,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:50:29,282 INFO L85 PathProgramCache]: Analyzing trace with hash -547117662, now seen corresponding path program 1 times [2023-04-03 01:50:29,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:50:29,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51275304] [2023-04-03 01:50:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:50:29,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:50:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:50:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:50:29,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:50:29,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51275304] [2023-04-03 01:50:29,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51275304] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:50:29,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:50:29,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:50:29,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081093807] [2023-04-03 01:50:29,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:50:29,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:50:29,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:50:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:50:29,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:50:29,497 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-03 01:50:29,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:50:29,688 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2023-04-03 01:50:29,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 01:50:29,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 35 [2023-04-03 01:50:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:50:29,690 INFO L225 Difference]: With dead ends: 125 [2023-04-03 01:50:29,690 INFO L226 Difference]: Without dead ends: 91 [2023-04-03 01:50:29,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-04-03 01:50:29,691 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:50:29,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 69 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:50:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-03 01:50:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2023-04-03 01:50:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-03 01:50:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2023-04-03 01:50:29,703 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 35 [2023-04-03 01:50:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:50:29,703 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2023-04-03 01:50:29,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-03 01:50:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2023-04-03 01:50:29,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 01:50:29,704 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:50:29,704 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] [2023-04-03 01:50:29,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:50:29,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:50:29,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:50:29,705 INFO L85 PathProgramCache]: Analyzing trace with hash -288541150, now seen corresponding path program 1 times [2023-04-03 01:50:29,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:50:29,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912753741] [2023-04-03 01:50:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:50:29,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:50:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:50:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:50:30,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:50:30,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912753741] [2023-04-03 01:50:30,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912753741] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:50:30,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:50:30,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 01:50:30,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097528969] [2023-04-03 01:50:30,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:50:30,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 01:50:30,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:50:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 01:50:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-04-03 01:50:30,627 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 19 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 8 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-03 01:50:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:50:31,333 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2023-04-03 01:50:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 01:50:31,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 8 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 35 [2023-04-03 01:50:31,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:50:31,335 INFO L225 Difference]: With dead ends: 129 [2023-04-03 01:50:31,335 INFO L226 Difference]: Without dead ends: 96 [2023-04-03 01:50:31,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2023-04-03 01:50:31,337 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 408 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:50:31,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 86 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:50:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-03 01:50:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 62. [2023-04-03 01:50:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-03 01:50:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2023-04-03 01:50:31,349 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 35 [2023-04-03 01:50:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:50:31,349 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2023-04-03 01:50:31,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 8 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-03 01:50:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2023-04-03 01:50:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-03 01:50:31,350 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:50:31,350 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] [2023-04-03 01:50:31,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:50:31,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:50:31,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:50:31,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1638093577, now seen corresponding path program 1 times [2023-04-03 01:50:31,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:50:31,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609767372] [2023-04-03 01:50:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:50:31,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:50:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:50:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:50:31,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:50:31,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609767372] [2023-04-03 01:50:31,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609767372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:50:31,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:50:31,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:50:31,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530032713] [2023-04-03 01:50:31,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:50:31,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:50:31,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:50:31,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:50:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:50:31,527 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-03 01:50:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:50:31,644 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2023-04-03 01:50:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 01:50:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 36 [2023-04-03 01:50:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:50:31,645 INFO L225 Difference]: With dead ends: 98 [2023-04-03 01:50:31,646 INFO L226 Difference]: Without dead ends: 96 [2023-04-03 01:50:31,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-03 01:50:31,647 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 35 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:50:31,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 352 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:50:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-03 01:50:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2023-04-03 01:50:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 15 states have call successors, (15), 15 states have call predecessors, (15), 15 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-03 01:50:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2023-04-03 01:50:31,663 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 36 [2023-04-03 01:50:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:50:31,664 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2023-04-03 01:50:31,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-03 01:50:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2023-04-03 01:50:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 01:50:31,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:50:31,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:50:31,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:50:31,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:50:31,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:50:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash 528830886, now seen corresponding path program 1 times [2023-04-03 01:50:31,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:50:31,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348370285] [2023-04-03 01:50:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:50:31,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:50:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:50:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:50:36,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:50:36,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348370285] [2023-04-03 01:50:36,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348370285] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:50:36,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840041365] [2023-04-03 01:50:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:50:36,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:50:36,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:50:36,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:50:36,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:50:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:50:37,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 166 conjunts are in the unsatisfiable core [2023-04-03 01:50:37,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:50:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:50:55,049 INFO L327 TraceCheckSpWp]: Computing backward predicates...