/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-var-start-time.3.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:42:21,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:42:21,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:42:21,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:42:21,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:42:21,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:42:21,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:42:21,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:42:21,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:42:21,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:42:21,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:42:21,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:42:21,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:42:21,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:42:21,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:42:21,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:42:21,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:42:21,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:42:21,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:42:21,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:42:21,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:42:21,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:42:21,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:42:21,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:42:21,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:42:21,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:42:21,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:42:21,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:42:21,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:42:21,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:42:21,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:42:21,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:42:21,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:42:21,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:42:21,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:42:21,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:42:21,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:42:21,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:42:21,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:42:21,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:42:21,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:42:21,362 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 01:42:21,397 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:42:21,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:42:21,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:42:21,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:42:21,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:42:21,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:42:21,399 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:42:21,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:42:21,399 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:42:21,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:42:21,400 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:42:21,401 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:42:21,401 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:42:21,401 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:42:21,401 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:42:21,401 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:42:21,401 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:42:21,401 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:42:21,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:42:21,402 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:42:21,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:42:21,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:42:21,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:42:21,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:42:21,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:42:21,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:42:21,403 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:42:21,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:42:21,403 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:42:21,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:42:21,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:42:21,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:42:21,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:42:21,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:42:21,404 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:42:21,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:42:21,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:42:21,405 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:42:21,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:42:21,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:42:21,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:42:21,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:42:21,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:42:21,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:42:21,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:42:21,664 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:42:21,664 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:42:21,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2023-04-03 01:42:22,871 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:42:23,099 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:42:23,100 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2023-04-03 01:42:23,112 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71442764c/76efc82cbeb54b4ebc6f35612a2f14a8/FLAG38479b56e [2023-04-03 01:42:23,130 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71442764c/76efc82cbeb54b4ebc6f35612a2f14a8 [2023-04-03 01:42:23,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:42:23,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:42:23,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:42:23,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:42:23,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:42:23,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@85d1d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23, skipping insertion in model container [2023-04-03 01:42:23,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:42:23,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:42:23,325 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-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2023-04-03 01:42:23,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:42:23,339 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:42:23,382 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2023-04-03 01:42:23,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:42:23,397 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:42:23,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23 WrapperNode [2023-04-03 01:42:23,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:42:23,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:42:23,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:42:23,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:42:23,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,438 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:42:23,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:42:23,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:42:23,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:42:23,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23" (1/1) ... [2023-04-03 01:42:23,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:42:23,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:42:23,471 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 01:42:23,472 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 01:42:23,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:42:23,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:42:23,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:42:23,500 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:42:23,501 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:42:23,501 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:42:23,501 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:42:23,501 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:42:23,501 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:42:23,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:42:23,501 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:42:23,501 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:42:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:42:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:42:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:42:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:42:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:42:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 01:42:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:42:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:42:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:42:23,503 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:42:23,503 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:42:23,503 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:42:23,503 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:42:23,503 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:42:23,503 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:42:23,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:42:23,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:42:23,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:42:23,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:42:23,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:42:23,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:42:23,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:42:23,583 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:42:23,585 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:42:24,005 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:42:24,297 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:42:24,297 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:42:24,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:42:24 BoogieIcfgContainer [2023-04-03 01:42:24,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:42:24,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:42:24,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:42:24,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:42:24,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:42:23" (1/3) ... [2023-04-03 01:42:24,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4e5056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:42:24, skipping insertion in model container [2023-04-03 01:42:24,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:42:23" (2/3) ... [2023-04-03 01:42:24,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4e5056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:42:24, skipping insertion in model container [2023-04-03 01:42:24,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:42:24" (3/3) ... [2023-04-03 01:42:24,308 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2023-04-03 01:42:24,323 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:42:24,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:42:24,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:42:24,381 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;@4091907c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:42:24,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:42:24,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 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 01:42:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-03 01:42:24,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:42:24,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:42:24,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:42:24,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:42:24,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1294721229, now seen corresponding path program 1 times [2023-04-03 01:42:24,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:42:24,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311196894] [2023-04-03 01:42:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:42:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:42:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:42:27,532 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 01:42:27,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:42:27,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311196894] [2023-04-03 01:42:27,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311196894] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:42:27,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:42:27,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 01:42:27,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701197576] [2023-04-03 01:42:27,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:42:27,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 01:42:27,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:42:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 01:42:27,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2023-04-03 01:42:27,585 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 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 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 8 states have call successors, (9), 6 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 01:42:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:42:29,162 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2023-04-03 01:42:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-03 01:42:29,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 8 states have call successors, (9), 6 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 32 [2023-04-03 01:42:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:42:29,170 INFO L225 Difference]: With dead ends: 88 [2023-04-03 01:42:29,171 INFO L226 Difference]: Without dead ends: 63 [2023-04-03 01:42:29,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=428, Invalid=2328, Unknown=0, NotChecked=0, Total=2756 [2023-04-03 01:42:29,177 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:42:29,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 157 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:42:29,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-03 01:42:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-04-03 01:42:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 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 01:42:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2023-04-03 01:42:29,221 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 32 [2023-04-03 01:42:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:42:29,221 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2023-04-03 01:42:29,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 8 states have call successors, (9), 6 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 01:42:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2023-04-03 01:42:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 01:42:29,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:42:29,223 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 01:42:29,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:42:29,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:42:29,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:42:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash 574496534, now seen corresponding path program 1 times [2023-04-03 01:42:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:42:29,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202526604] [2023-04-03 01:42:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:42:29,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:42:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:42:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 01:42:38,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:42:38,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202526604] [2023-04-03 01:42:38,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202526604] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:42:38,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866998863] [2023-04-03 01:42:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:42:38,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:42:38,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:42:38,031 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 01:42:38,034 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 01:42:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:42:38,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 137 conjunts are in the unsatisfiable core [2023-04-03 01:42:38,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:42:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:42:54,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:43:24,991 WARN L223 SmtUtils]: Spent 29.65s on a formula simplification. DAG size of input: 1251 DAG size of output: 84 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-03 01:43:57,091 WARN L223 SmtUtils]: Spent 29.88s on a formula simplification. DAG size of input: 1247 DAG size of output: 80 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-03 01:44:14,553 WARN L223 SmtUtils]: Spent 15.06s on a formula simplification. DAG size of input: 892 DAG size of output: 105 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-03 01:45:28,250 WARN L223 SmtUtils]: Spent 30.51s on a formula simplification. DAG size of input: 1259 DAG size of output: 93 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)