/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.7.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:56:42,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:56:42,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:56:42,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:56:42,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:56:42,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:56:42,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:56:42,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:56:42,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:56:42,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:56:42,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:56:42,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:56:42,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:56:42,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:56:42,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:56:42,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:56:42,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:56:42,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:56:42,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:56:43,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:56:43,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:56:43,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:56:43,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:56:43,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:56:43,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:56:43,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:56:43,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:56:43,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:56:43,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:56:43,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:56:43,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:56:43,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:56:43,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:56:43,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:56:43,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:56:43,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:56:43,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:56:43,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:56:43,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:56:43,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:56:43,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:56:43,026 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 01:56:43,058 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:56:43,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:56:43,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:56:43,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:56:43,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:56:43,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:56:43,060 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:56:43,060 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:56:43,060 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:56:43,061 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:56:43,061 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:56:43,061 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:56:43,062 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:56:43,062 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:56:43,062 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:56:43,062 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:56:43,062 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:56:43,062 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:56:43,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:56:43,063 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:56:43,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:56:43,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:56:43,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:56:43,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:56:43,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:56:43,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:56:43,064 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:56:43,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:56:43,064 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:56:43,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:56:43,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:56:43,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:56:43,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:56:43,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:56:43,066 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:56:43,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:56:43,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:56:43,066 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:56:43,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:56:43,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:56:43,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:56:43,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:56:43,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:56:43,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:56:43,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:56:43,307 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:56:43,307 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:56:43,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c [2023-04-03 01:56:44,480 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:56:44,691 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:56:44,692 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c [2023-04-03 01:56:44,701 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/908434e2c/e07668e2e74c49c2b9526af9c605d6b6/FLAG2f4159959 [2023-04-03 01:56:44,719 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/908434e2c/e07668e2e74c49c2b9526af9c605d6b6 [2023-04-03 01:56:44,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:56:44,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:56:44,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:56:44,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:56:44,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:56:44,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:56:44" (1/1) ... [2023-04-03 01:56:44,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c600316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:44, skipping insertion in model container [2023-04-03 01:56:44,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:56:44" (1/1) ... [2023-04-03 01:56:44,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:56:44,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:56:44,985 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.7.ufo.UNBOUNDED.pals.c[20047,20060] [2023-04-03 01:56:44,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:56:45,005 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:56:45,054 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.7.ufo.UNBOUNDED.pals.c[20047,20060] [2023-04-03 01:56:45,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:56:45,074 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:56:45,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45 WrapperNode [2023-04-03 01:56:45,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:56:45,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:56:45,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:56:45,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:56:45,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45" (1/1) ... [2023-04-03 01:56:45,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45" (1/1) ... [2023-04-03 01:56:45,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45" (1/1) ... [2023-04-03 01:56:45,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45" (1/1) ... [2023-04-03 01:56:45,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45" (1/1) ... [2023-04-03 01:56:45,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45" (1/1) ... [2023-04-03 01:56:45,130 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45" (1/1) ... [2023-04-03 01:56:45,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45" (1/1) ... [2023-04-03 01:56:45,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:56:45,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:56:45,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:56:45,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:56:45,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45" (1/1) ... [2023-04-03 01:56:45,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:56:45,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:56:45,180 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 01:56:45,199 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 01:56:45,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:56:45,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:56:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:56:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:56:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:56:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:56:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:56:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 01:56:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-03 01:56:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure node6 [2023-04-03 01:56:45,219 INFO L138 BoogieDeclarations]: Found implementation of procedure node7 [2023-04-03 01:56:45,219 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:56:45,219 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:56:45,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:56:45,219 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:56:45,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:56:45,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:56:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:56:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:56:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:56:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:56:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 01:56:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:56:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:56:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:56:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:56:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:56:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:56:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:56:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 01:56:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 01:56:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 01:56:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2023-04-03 01:56:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:56:45,222 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:56:45,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:56:45,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:56:45,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:56:45,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:56:45,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:56:45,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:56:45,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:56:45,313 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:56:45,315 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:56:45,887 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:56:46,487 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:56:46,487 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:56:46,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:56:46 BoogieIcfgContainer [2023-04-03 01:56:46,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:56:46,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:56:46,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:56:46,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:56:46,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:56:44" (1/3) ... [2023-04-03 01:56:46,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5523c9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:56:46, skipping insertion in model container [2023-04-03 01:56:46,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:56:45" (2/3) ... [2023-04-03 01:56:46,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5523c9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:56:46, skipping insertion in model container [2023-04-03 01:56:46,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:56:46" (3/3) ... [2023-04-03 01:56:46,498 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals.c [2023-04-03 01:56:46,513 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:56:46,514 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:56:46,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:56:46,574 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;@6648ffa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:56:46,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:56:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-03 01:56:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-03 01:56:46,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:56:46,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:56:46,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:56:46,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:56:46,594 INFO L85 PathProgramCache]: Analyzing trace with hash 976653671, now seen corresponding path program 1 times [2023-04-03 01:56:46,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:56:46,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974950123] [2023-04-03 01:56:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:56:46,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:56:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:56:52,369 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 01:56:52,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:56:52,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974950123] [2023-04-03 01:56:52,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974950123] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:56:52,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:56:52,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-04-03 01:56:52,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455168996] [2023-04-03 01:56:52,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:56:52,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-03 01:56:52,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:56:52,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-03 01:56:52,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2023-04-03 01:56:52,419 INFO L87 Difference]: Start difference. First operand has 55 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 01:56:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:56:54,664 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2023-04-03 01:56:54,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-03 01:56:54,666 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 46 [2023-04-03 01:56:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:56:54,672 INFO L225 Difference]: With dead ends: 133 [2023-04-03 01:56:54,672 INFO L226 Difference]: Without dead ends: 91 [2023-04-03 01:56:54,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=815, Invalid=3345, Unknown=0, NotChecked=0, Total=4160 [2023-04-03 01:56:54,679 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 414 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:56:54,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 140 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 01:56:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-03 01:56:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2023-04-03 01:56:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2023-04-03 01:56:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2023-04-03 01:56:54,733 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 46 [2023-04-03 01:56:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:56:54,734 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2023-04-03 01:56:54,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 01:56:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2023-04-03 01:56:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:56:54,736 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:56:54,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:56:54,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:56:54,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:56:54,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:56:54,737 INFO L85 PathProgramCache]: Analyzing trace with hash -686307187, now seen corresponding path program 1 times [2023-04-03 01:56:54,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:56:54,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801294843] [2023-04-03 01:56:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:56:54,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:56:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:56:55,569 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 01:56:55,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:56:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801294843] [2023-04-03 01:56:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801294843] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:56:55,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:56:55,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:56:55,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722209961] [2023-04-03 01:56:55,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:56:55,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:56:55,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:56:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:56:55,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:56:55,573 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-03 01:56:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:56:56,135 INFO L93 Difference]: Finished difference Result 177 states and 191 transitions. [2023-04-03 01:56:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 01:56:56,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 48 [2023-04-03 01:56:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:56:56,138 INFO L225 Difference]: With dead ends: 177 [2023-04-03 01:56:56,138 INFO L226 Difference]: Without dead ends: 136 [2023-04-03 01:56:56,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-03 01:56:56,140 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 140 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:56:56,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 125 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:56:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-04-03 01:56:56,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121. [2023-04-03 01:56:56,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 62 states have internal predecessors, (67), 30 states have call successors, (30), 30 states have call predecessors, (30), 30 states have return successors, (31), 28 states have call predecessors, (31), 29 states have call successors, (31) [2023-04-03 01:56:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2023-04-03 01:56:56,174 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 48 [2023-04-03 01:56:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:56:56,174 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2023-04-03 01:56:56,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-03 01:56:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2023-04-03 01:56:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:56:56,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:56:56,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:56:56,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:56:56,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:56:56,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:56:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash 575548335, now seen corresponding path program 1 times [2023-04-03 01:56:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:56:56,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908474221] [2023-04-03 01:56:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:56:56,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:56:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:56:59,039 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 01:56:59,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:56:59,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908474221] [2023-04-03 01:56:59,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908474221] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:56:59,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:56:59,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-04-03 01:56:59,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752985782] [2023-04-03 01:56:59,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:56:59,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-03 01:56:59,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:56:59,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-03 01:56:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-04-03 01:56:59,042 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 29 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 15 states have internal predecessors, (24), 11 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-03 01:57:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:57:00,097 INFO L93 Difference]: Finished difference Result 224 states and 239 transitions. [2023-04-03 01:57:00,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 01:57:00,097 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 15 states have internal predecessors, (24), 11 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 48 [2023-04-03 01:57:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:57:00,099 INFO L225 Difference]: With dead ends: 224 [2023-04-03 01:57:00,099 INFO L226 Difference]: Without dead ends: 145 [2023-04-03 01:57:00,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2023-04-03 01:57:00,102 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 560 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:57:00,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 152 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:57:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-04-03 01:57:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2023-04-03 01:57:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 30 states have call successors, (30), 30 states have call predecessors, (30), 30 states have return successors, (31), 28 states have call predecessors, (31), 29 states have call successors, (31) [2023-04-03 01:57:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2023-04-03 01:57:00,137 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 48 [2023-04-03 01:57:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:57:00,138 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2023-04-03 01:57:00,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 15 states have internal predecessors, (24), 11 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-03 01:57:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2023-04-03 01:57:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-03 01:57:00,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:57:00,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:57:00,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:57:00,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:57:00,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:57:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash -209348292, now seen corresponding path program 1 times [2023-04-03 01:57:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:57:00,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552944955] [2023-04-03 01:57:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:57:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:57:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:57:01,789 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 01:57:01,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:57:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552944955] [2023-04-03 01:57:01,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552944955] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:57:01,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:57:01,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 01:57:01,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275397131] [2023-04-03 01:57:01,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:57:01,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:57:01,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:57:01,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:57:01,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:57:01,793 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-03 01:57:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:57:02,120 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2023-04-03 01:57:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 01:57:02,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 49 [2023-04-03 01:57:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:57:02,132 INFO L225 Difference]: With dead ends: 158 [2023-04-03 01:57:02,132 INFO L226 Difference]: Without dead ends: 156 [2023-04-03 01:57:02,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 01:57:02,138 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 35 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:57:02,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 652 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:57:02,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-04-03 01:57:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2023-04-03 01:57:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 68 states have internal predecessors, (71), 31 states have call successors, (31), 31 states have call predecessors, (31), 32 states have return successors, (33), 29 states have call predecessors, (33), 30 states have call successors, (33) [2023-04-03 01:57:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2023-04-03 01:57:02,191 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 49 [2023-04-03 01:57:02,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:57:02,191 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2023-04-03 01:57:02,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-03 01:57:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2023-04-03 01:57:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 01:57:02,199 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:57:02,200 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:57:02,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:57:02,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:57:02,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:57:02,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1392345336, now seen corresponding path program 1 times [2023-04-03 01:57:02,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:57:02,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730566164] [2023-04-03 01:57:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:57:02,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:57:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:57:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:57:20,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:57:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730566164] [2023-04-03 01:57:20,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730566164] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:57:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455824290] [2023-04-03 01:57:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:57:20,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:57:20,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:57:20,507 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 01:57:20,509 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 01:57:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:57:20,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 260 conjunts are in the unsatisfiable core [2023-04-03 01:57:20,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:58:20,195 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-04-03 01:58:49,178 WARN L223 SmtUtils]: Spent 28.34s on a formula simplification. DAG size of input: 235 DAG size of output: 192 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-04-03 01:59:22,449 WARN L223 SmtUtils]: Spent 11.76s on a formula simplification that was a NOOP. DAG size: 278 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)