/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.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:44:33,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:44:33,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:44:33,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:44:33,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:44:33,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:44:33,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:44:33,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:44:33,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:44:33,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:44:33,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:44:33,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:44:33,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:44:33,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:44:33,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:44:33,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:44:33,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:44:33,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:44:33,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:44:33,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:44:33,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:44:33,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:44:33,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:44:33,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:44:33,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:44:33,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:44:33,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:44:33,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:44:33,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:44:33,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:44:33,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:44:33,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:44:33,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:44:33,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:44:33,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:44:33,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:44:33,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:44:33,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:44:33,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:44:33,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:44:33,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:44:33,368 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 01:44:33,391 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:44:33,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:44:33,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:44:33,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:44:33,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:44:33,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:44:33,392 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:44:33,392 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:44:33,392 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:44:33,392 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:44:33,393 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:44:33,393 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:44:33,393 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:44:33,393 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:44:33,393 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:44:33,394 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:44:33,394 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:44:33,394 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:44:33,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:44:33,394 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:44:33,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:44:33,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:44:33,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:44:33,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:44:33,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:44:33,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:44:33,395 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:44:33,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:44:33,395 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:44:33,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:44:33,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:44:33,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:44:33,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:44:33,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:44:33,396 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:44:33,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:44:33,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:44:33,396 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:44:33,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:44:33,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:44:33,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:44:33,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:44:33,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:44:33,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:44:33,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:44:33,556 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:44:33,556 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:44:33,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2023-04-03 01:44:34,587 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:44:34,788 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:44:34,789 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2023-04-03 01:44:34,796 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28199226b/827a32575a5c4df887630691de705b66/FLAG3a555547e [2023-04-03 01:44:34,807 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28199226b/827a32575a5c4df887630691de705b66 [2023-04-03 01:44:34,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:44:34,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:44:34,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:44:34,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:44:34,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:44:34,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:44:34" (1/1) ... [2023-04-03 01:44:34,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6888ae57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:34, skipping insertion in model container [2023-04-03 01:44:34,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:44:34" (1/1) ... [2023-04-03 01:44:34,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:44:34,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:44:34,953 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.ufo.UNBOUNDED.pals.c[6899,6912] [2023-04-03 01:44:34,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:44:34,963 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:44:34,991 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.ufo.UNBOUNDED.pals.c[6899,6912] [2023-04-03 01:44:34,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:44:35,003 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:44:35,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35 WrapperNode [2023-04-03 01:44:35,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:44:35,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:44:35,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:44:35,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:44:35,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35" (1/1) ... [2023-04-03 01:44:35,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35" (1/1) ... [2023-04-03 01:44:35,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35" (1/1) ... [2023-04-03 01:44:35,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35" (1/1) ... [2023-04-03 01:44:35,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35" (1/1) ... [2023-04-03 01:44:35,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35" (1/1) ... [2023-04-03 01:44:35,033 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35" (1/1) ... [2023-04-03 01:44:35,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35" (1/1) ... [2023-04-03 01:44:35,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:44:35,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:44:35,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:44:35,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:44:35,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35" (1/1) ... [2023-04-03 01:44:35,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:44:35,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:44:35,058 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 01:44:35,075 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 01:44:35,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:44:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:44:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:44:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:44:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:44:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:44:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:44:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:44:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:44:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:44:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:44:35,098 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:44:35,099 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:44:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:44:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:44:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:44:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:44:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:44:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:44:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:44:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:44:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:44:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:44:35,171 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:44:35,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:44:35,473 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:44:35,668 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:44:35,668 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:44:35,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:44:35 BoogieIcfgContainer [2023-04-03 01:44:35,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:44:35,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:44:35,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:44:35,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:44:35,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:44:34" (1/3) ... [2023-04-03 01:44:35,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727e5904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:44:35, skipping insertion in model container [2023-04-03 01:44:35,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:44:35" (2/3) ... [2023-04-03 01:44:35,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727e5904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:44:35, skipping insertion in model container [2023-04-03 01:44:35,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:44:35" (3/3) ... [2023-04-03 01:44:35,676 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2023-04-03 01:44:35,688 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:44:35,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:44:35,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:44:35,732 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;@73c72016, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:44:35,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:44:35,735 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 01:44:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-03 01:44:35,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:44:35,741 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 01:44:35,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:44:35,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:44:35,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1651210126, now seen corresponding path program 1 times [2023-04-03 01:44:35,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:44:35,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16404245] [2023-04-03 01:44:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:44:35,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:44:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:44:38,150 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 01:44:38,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:44:38,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16404245] [2023-04-03 01:44:38,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16404245] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:44:38,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:44:38,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-04-03 01:44:38,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34247244] [2023-04-03 01:44:38,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:44:38,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-03 01:44:38,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:44:38,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-03 01:44:38,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2023-04-03 01:44:38,196 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 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:44:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:44:39,050 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2023-04-03 01:44:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-03 01:44:39,052 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 32 [2023-04-03 01:44:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:44:39,057 INFO L225 Difference]: With dead ends: 88 [2023-04-03 01:44:39,057 INFO L226 Difference]: Without dead ends: 63 [2023-04-03 01:44:39,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2023-04-03 01:44:39,061 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:44:39,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 197 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:44:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-03 01:44:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-04-03 01:44:39,091 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 01:44:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2023-04-03 01:44:39,093 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 32 [2023-04-03 01:44:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:44:39,093 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2023-04-03 01:44:39,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:44:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2023-04-03 01:44:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 01:44:39,095 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:44:39,095 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 01:44:39,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:44:39,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:44:39,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:44:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash 481137603, now seen corresponding path program 1 times [2023-04-03 01:44:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:44:39,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682723429] [2023-04-03 01:44:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:44:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:44:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:44:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:44:43,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:44:43,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682723429] [2023-04-03 01:44:43,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682723429] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:44:43,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058173846] [2023-04-03 01:44:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:44:43,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:44:43,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:44:43,631 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 01:44:43,632 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 01:44:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:44:43,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 160 conjunts are in the unsatisfiable core [2023-04-03 01:44:43,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:45:00,832 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 01:45:00,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:45:26,624 WARN L223 SmtUtils]: Spent 25.02s on a formula simplification. DAG size of input: 1255 DAG size of output: 89 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-03 01:45:54,435 WARN L223 SmtUtils]: Spent 26.10s 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 01:46:33,041 WARN L223 SmtUtils]: Spent 35.87s on a formula simplification. DAG size of input: 1445 DAG size of output: 105 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-03 01:47:32,242 WARN L223 SmtUtils]: Spent 23.16s 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)