/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.6.ufo.BOUNDED-12.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:54:09,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:54:09,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:54:09,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:54:09,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:54:09,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:54:09,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:54:09,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:54:09,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:54:09,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:54:09,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:54:09,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:54:09,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:54:09,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:54:09,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:54:09,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:54:09,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:54:09,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:54:09,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:54:09,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:54:09,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:54:09,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:54:09,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:54:09,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:54:09,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:54:09,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:54:09,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:54:09,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:54:09,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:54:09,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:54:09,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:54:09,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:54:09,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:54:09,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:54:09,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:54:09,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:54:09,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:54:09,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:54:09,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:54:09,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:54:09,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:54:09,445 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 01:54:09,472 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:54:09,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:54:09,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:54:09,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:54:09,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:54:09,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:54:09,474 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:54:09,474 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:54:09,474 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:54:09,474 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:54:09,475 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:54:09,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:54:09,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:54:09,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:54:09,475 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:54:09,475 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:54:09,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:54:09,476 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:54:09,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:54:09,476 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:54:09,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:54:09,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:54:09,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:54:09,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:54:09,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:54:09,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:54:09,477 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:54:09,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:54:09,478 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:54:09,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:54:09,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:54:09,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:54:09,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:54:09,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:54:09,478 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:54:09,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:54:09,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:54:09,479 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:54:09,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:54:09,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:54:09,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:54:09,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:54:09,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:54:09,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:54:09,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:54:09,725 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:54:09,726 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:54:09,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c [2023-04-03 01:54:10,853 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:54:11,086 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:54:11,087 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c [2023-04-03 01:54:11,101 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/204ac187b/27a4f0fa8f6e4ce3bbb122c37a94ea7d/FLAG1047e93fa [2023-04-03 01:54:11,115 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/204ac187b/27a4f0fa8f6e4ce3bbb122c37a94ea7d [2023-04-03 01:54:11,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:54:11,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:54:11,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:54:11,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:54:11,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:54:11,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4272cbd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11, skipping insertion in model container [2023-04-03 01:54:11,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:54:11,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:54:11,338 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.6.ufo.BOUNDED-12.pals.c[15075,15088] [2023-04-03 01:54:11,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:54:11,350 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:54:11,393 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.6.ufo.BOUNDED-12.pals.c[15075,15088] [2023-04-03 01:54:11,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:54:11,406 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:54:11,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11 WrapperNode [2023-04-03 01:54:11,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:54:11,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:54:11,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:54:11,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:54:11,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,448 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:54:11,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:54:11,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:54:11,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:54:11,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (1/1) ... [2023-04-03 01:54:11,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:54:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:54:11,497 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 01:54:11,504 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 01:54:11,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:54:11,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:54:11,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:54:11,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:54:11,527 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:54:11,527 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:54:11,527 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:54:11,527 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 01:54:11,527 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-03 01:54:11,527 INFO L138 BoogieDeclarations]: Found implementation of procedure node6 [2023-04-03 01:54:11,527 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:54:11,527 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:54:11,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:54:11,528 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:54:11,528 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:54:11,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:54:11,528 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:54:11,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:54:11,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:54:11,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:54:11,529 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:54:11,529 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:54:11,529 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:54:11,529 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:54:11,529 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:54:11,529 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:54:11,529 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:54:11,529 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 01:54:11,529 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 01:54:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 01:54:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:54:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:54:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:54:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:54:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:54:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:54:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:54:11,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:54:11,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:54:11,629 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:54:11,631 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:54:12,105 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:54:12,517 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:54:12,517 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:54:12,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:54:12 BoogieIcfgContainer [2023-04-03 01:54:12,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:54:12,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:54:12,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:54:12,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:54:12,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:54:11" (1/3) ... [2023-04-03 01:54:12,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7964d157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:54:12, skipping insertion in model container [2023-04-03 01:54:12,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:11" (2/3) ... [2023-04-03 01:54:12,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7964d157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:54:12, skipping insertion in model container [2023-04-03 01:54:12,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:54:12" (3/3) ... [2023-04-03 01:54:12,528 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c [2023-04-03 01:54:12,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:54:12,544 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:54:12,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:54:12,605 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;@1b2c4122, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:54:12,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:54:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-03 01:54:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 01:54:12,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:12,620 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] [2023-04-03 01:54:12,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:12,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:12,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1225992123, now seen corresponding path program 1 times [2023-04-03 01:54:12,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:12,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354059046] [2023-04-03 01:54:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:12,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:16,754 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 01:54:16,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:16,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354059046] [2023-04-03 01:54:16,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354059046] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:16,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:16,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-04-03 01:54:16,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785704189] [2023-04-03 01:54:16,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-03 01:54:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:16,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-03 01:54:16,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2023-04-03 01:54:16,788 INFO L87 Difference]: Start difference. First operand has 53 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-03 01:54:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:18,233 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2023-04-03 01:54:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 01:54:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 43 [2023-04-03 01:54:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:18,242 INFO L225 Difference]: With dead ends: 136 [2023-04-03 01:54:18,242 INFO L226 Difference]: Without dead ends: 87 [2023-04-03 01:54:18,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=495, Invalid=2157, Unknown=0, NotChecked=0, Total=2652 [2023-04-03 01:54:18,248 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 482 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:18,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 174 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:54:18,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-03 01:54:18,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2023-04-03 01:54:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-04-03 01:54:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-04-03 01:54:18,300 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 43 [2023-04-03 01:54:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:18,301 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-04-03 01:54:18,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-03 01:54:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-04-03 01:54:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 01:54:18,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:18,303 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] [2023-04-03 01:54:18,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:54:18,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:18,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1043507363, now seen corresponding path program 1 times [2023-04-03 01:54:18,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:18,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443814648] [2023-04-03 01:54:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:18,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:18,752 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 01:54:18,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:18,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443814648] [2023-04-03 01:54:18,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443814648] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:18,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:18,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:54:18,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525047675] [2023-04-03 01:54:18,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:18,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:54:18,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:18,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:54:18,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:54:18,764 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-03 01:54:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:19,097 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2023-04-03 01:54:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:54:19,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45 [2023-04-03 01:54:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:19,101 INFO L225 Difference]: With dead ends: 146 [2023-04-03 01:54:19,101 INFO L226 Difference]: Without dead ends: 107 [2023-04-03 01:54:19,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:54:19,103 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:19,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 105 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:54:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-03 01:54:19,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2023-04-03 01:54:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.125) internal successors, (45), 41 states have internal predecessors, (45), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-03 01:54:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2023-04-03 01:54:19,125 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 45 [2023-04-03 01:54:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:19,126 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2023-04-03 01:54:19,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-03 01:54:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2023-04-03 01:54:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 01:54:19,127 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:19,127 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] [2023-04-03 01:54:19,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:54:19,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:19,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:19,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1459518989, now seen corresponding path program 1 times [2023-04-03 01:54:19,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:19,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280174344] [2023-04-03 01:54:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:19,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:22,050 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 01:54:22,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:22,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280174344] [2023-04-03 01:54:22,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280174344] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:22,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:22,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-04-03 01:54:22,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715717826] [2023-04-03 01:54:22,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:22,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-03 01:54:22,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:22,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-03 01:54:22,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2023-04-03 01:54:22,053 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-03 01:54:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:23,918 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2023-04-03 01:54:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-03 01:54:23,919 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 45 [2023-04-03 01:54:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:23,920 INFO L225 Difference]: With dead ends: 146 [2023-04-03 01:54:23,920 INFO L226 Difference]: Without dead ends: 107 [2023-04-03 01:54:23,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=662, Invalid=2760, Unknown=0, NotChecked=0, Total=3422 [2023-04-03 01:54:23,923 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 495 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:23,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 154 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:54:23,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-03 01:54:23,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2023-04-03 01:54:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-03 01:54:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2023-04-03 01:54:23,946 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 45 [2023-04-03 01:54:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:23,946 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2023-04-03 01:54:23,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-03 01:54:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2023-04-03 01:54:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-03 01:54:23,947 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:23,947 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 01:54:23,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:54:23,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:23,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1555572408, now seen corresponding path program 1 times [2023-04-03 01:54:23,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:23,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781657305] [2023-04-03 01:54:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:23,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:25,120 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 01:54:25,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:25,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781657305] [2023-04-03 01:54:25,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781657305] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:25,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:25,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 01:54:25,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84677413] [2023-04-03 01:54:25,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:25,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:54:25,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:54:25,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:54:25,123 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-03 01:54:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:25,378 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2023-04-03 01:54:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 01:54:25,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 46 [2023-04-03 01:54:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:25,380 INFO L225 Difference]: With dead ends: 119 [2023-04-03 01:54:25,380 INFO L226 Difference]: Without dead ends: 117 [2023-04-03 01:54:25,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-03 01:54:25,381 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:25,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 614 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:54:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-03 01:54:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2023-04-03 01:54:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 20 states have call successors, (20), 20 states have call predecessors, (20), 20 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2023-04-03 01:54:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2023-04-03 01:54:25,407 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 46 [2023-04-03 01:54:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:25,407 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2023-04-03 01:54:25,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-03 01:54:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2023-04-03 01:54:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 01:54:25,409 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:25,412 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, 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 01:54:25,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:54:25,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:25,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:25,413 INFO L85 PathProgramCache]: Analyzing trace with hash -482165746, now seen corresponding path program 1 times [2023-04-03 01:54:25,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:25,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645144746] [2023-04-03 01:54:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:25,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:54:38,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:38,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645144746] [2023-04-03 01:54:38,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645144746] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:54:38,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478965626] [2023-04-03 01:54:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:38,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:54:38,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:54:38,149 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 01:54:38,154 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 01:54:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:38,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 235 conjunts are in the unsatisfiable core [2023-04-03 01:54:38,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:55:20,120 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-04-03 01:55:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:55:45,212 INFO L327 TraceCheckSpWp]: Computing backward predicates...