/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:25:57,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:25:57,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:25:57,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:25:57,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:25:57,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:25:57,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:25:57,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:25:57,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:25:57,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:25:57,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:25:57,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:25:57,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:25:57,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:25:57,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:25:57,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:25:57,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:25:57,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:25:57,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:25:57,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:25:57,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:25:57,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:25:57,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:25:57,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:25:57,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:25:57,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:25:57,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:25:57,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:25:57,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:25:57,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:25:57,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:25:57,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:25:57,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:25:57,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:25:57,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:25:57,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:25:57,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:25:57,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:25:57,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:25:57,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:25:57,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:25:57,550 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 [2023-04-01 12:25:57,577 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:25:57,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:25:57,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:25:57,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:25:57,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:25:57,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:25:57,579 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:25:57,579 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:25:57,579 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:25:57,579 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:25:57,580 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:25:57,580 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:25:57,580 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:25:57,580 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:25:57,580 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:25:57,581 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:25:57,581 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:25:57,581 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:25:57,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:25:57,581 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:25:57,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:25:57,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:25:57,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:25:57,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:25:57,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:25:57,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:25:57,582 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:25:57,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:25:57,582 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:25:57,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:25:57,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:25:57,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:25:57,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:25:57,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:25:57,583 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:25:57,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:25:57,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:25:57,584 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:25:57,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:25:57,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:25:57,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:25:57,584 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:25:57,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:25:57,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:25:57,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:25:57,804 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:25:57,805 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:25:57,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2023-04-01 12:25:58,889 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:25:59,136 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:25:59,136 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2023-04-01 12:25:59,144 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ffd2c8cc/fb07cf89591c4b9f92a76e3dea151116/FLAGe06c17a54 [2023-04-01 12:25:59,158 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ffd2c8cc/fb07cf89591c4b9f92a76e3dea151116 [2023-04-01 12:25:59,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:25:59,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:25:59,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:25:59,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:25:59,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:25:59,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b050654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59, skipping insertion in model container [2023-04-01 12:25:59,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:25:59,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:25:59,420 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.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2023-04-01 12:25:59,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:25:59,435 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:25:59,486 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.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2023-04-01 12:25:59,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:25:59,501 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:25:59,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59 WrapperNode [2023-04-01 12:25:59,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:25:59,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:25:59,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:25:59,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:25:59,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,550 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:25:59,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:25:59,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:25:59,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:25:59,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59" (1/1) ... [2023-04-01 12:25:59,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:25:59,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:25:59,590 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) [2023-04-01 12:25:59,596 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 [2023-04-01 12:25:59,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:25:59,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:25:59,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:25:59,630 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:25:59,631 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 12:25:59,631 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 12:25:59,631 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 12:25:59,631 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 12:25:59,631 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-01 12:25:59,631 INFO L138 BoogieDeclarations]: Found implementation of procedure node6 [2023-04-01 12:25:59,631 INFO L138 BoogieDeclarations]: Found implementation of procedure node7 [2023-04-01 12:25:59,631 INFO L138 BoogieDeclarations]: Found implementation of procedure node8 [2023-04-01 12:25:59,631 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:25:59,632 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:25:59,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:25:59,632 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:25:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:25:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:25:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:25:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:25:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:25:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:25:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:25:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:25:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:25:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:25:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:25:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:25:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:25:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:25:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:25:59,634 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 12:25:59,634 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-01 12:25:59,634 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2023-04-01 12:25:59,634 INFO L130 BoogieDeclarations]: Found specification of procedure node8 [2023-04-01 12:25:59,634 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:25:59,634 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:25:59,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:25:59,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:25:59,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:25:59,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:25:59,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:25:59,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:25:59,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:25:59,746 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:25:59,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:26:00,266 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:26:00,979 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:26:00,980 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:26:00,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:26:00 BoogieIcfgContainer [2023-04-01 12:26:00,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:26:00,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:26:00,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:26:00,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:26:00,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:25:59" (1/3) ... [2023-04-01 12:26:00,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ab1908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:26:00, skipping insertion in model container [2023-04-01 12:26:00,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:59" (2/3) ... [2023-04-01 12:26:00,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ab1908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:26:00, skipping insertion in model container [2023-04-01 12:26:00,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:26:00" (3/3) ... [2023-04-01 12:26:00,991 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2023-04-01 12:26:01,006 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:26:01,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:26:01,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:26:01,063 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;@36a73c59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:26:01,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:26:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 14 states have call successors, (14), 14 states have call predecessors, (14), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:26:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 12:26:01,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:01,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:26:01,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:01,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:01,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1913415844, now seen corresponding path program 1 times [2023-04-01 12:26:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:01,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997664704] [2023-04-01 12:26:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:07,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:07,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997664704] [2023-04-01 12:26:07,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997664704] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:07,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:07,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2023-04-01 12:26:07,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106519195] [2023-04-01 12:26:07,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:07,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 12:26:07,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:07,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 12:26:07,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 12:26:07,958 INFO L87 Difference]: Start difference. First operand has 58 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 14 states have call successors, (14), 14 states have call predecessors, (14), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 33 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 12 states have call successors, (14), 10 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 12:26:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:09,426 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2023-04-01 12:26:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 12:26:09,429 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 12 states have call successors, (14), 10 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 49 [2023-04-01 12:26:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:09,437 INFO L225 Difference]: With dead ends: 142 [2023-04-01 12:26:09,437 INFO L226 Difference]: Without dead ends: 97 [2023-04-01 12:26:09,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=521, Invalid=1929, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 12:26:09,446 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 465 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:09,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 156 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:26:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-04-01 12:26:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2023-04-01 12:26:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2023-04-01 12:26:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2023-04-01 12:26:09,515 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 49 [2023-04-01 12:26:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:09,516 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2023-04-01 12:26:09,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 12 states have call successors, (14), 10 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 12:26:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2023-04-01 12:26:09,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:26:09,520 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:09,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:26:09,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:26:09,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:09,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:09,521 INFO L85 PathProgramCache]: Analyzing trace with hash -863713536, now seen corresponding path program 1 times [2023-04-01 12:26:09,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:09,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675732748] [2023-04-01 12:26:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:09,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:10,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:10,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675732748] [2023-04-01 12:26:10,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675732748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:10,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:10,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:26:10,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182334963] [2023-04-01 12:26:10,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:10,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:26:10,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:26:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:26:10,236 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 11 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 12:26:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:10,750 INFO L93 Difference]: Finished difference Result 189 states and 203 transitions. [2023-04-01 12:26:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 12:26:10,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 51 [2023-04-01 12:26:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:10,753 INFO L225 Difference]: With dead ends: 189 [2023-04-01 12:26:10,753 INFO L226 Difference]: Without dead ends: 145 [2023-04-01 12:26:10,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 12:26:10,755 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 105 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:10,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 129 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:26:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-04-01 12:26:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 130. [2023-04-01 12:26:10,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 65 states have internal predecessors, (70), 33 states have call successors, (33), 33 states have call predecessors, (33), 33 states have return successors, (34), 31 states have call predecessors, (34), 32 states have call successors, (34) [2023-04-01 12:26:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2023-04-01 12:26:10,793 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 51 [2023-04-01 12:26:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:10,794 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2023-04-01 12:26:10,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 12:26:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2023-04-01 12:26:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:26:10,795 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:10,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:26:10,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:26:10,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:10,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:10,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1401420996, now seen corresponding path program 1 times [2023-04-01 12:26:10,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:10,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516980361] [2023-04-01 12:26:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:10,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:15,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:15,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516980361] [2023-04-01 12:26:15,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516980361] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:15,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:15,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2023-04-01 12:26:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489191485] [2023-04-01 12:26:15,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:15,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 12:26:15,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:15,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 12:26:15,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 12:26:15,674 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand has 33 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 12 states have call successors, (14), 10 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 12:26:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:17,748 INFO L93 Difference]: Finished difference Result 239 states and 254 transitions. [2023-04-01 12:26:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-01 12:26:17,749 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 12 states have call successors, (14), 10 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 51 [2023-04-01 12:26:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:17,750 INFO L225 Difference]: With dead ends: 239 [2023-04-01 12:26:17,750 INFO L226 Difference]: Without dead ends: 154 [2023-04-01 12:26:17,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=820, Invalid=2602, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 12:26:17,753 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 523 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:17,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 175 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:26:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-04-01 12:26:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 130. [2023-04-01 12:26:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 65 states have internal predecessors, (69), 33 states have call successors, (33), 33 states have call predecessors, (33), 33 states have return successors, (34), 31 states have call predecessors, (34), 32 states have call successors, (34) [2023-04-01 12:26:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2023-04-01 12:26:17,791 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 51 [2023-04-01 12:26:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:17,791 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2023-04-01 12:26:17,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 12 states have call successors, (14), 10 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 12:26:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2023-04-01 12:26:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 12:26:17,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:17,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:26:17,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:26:17,793 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:17,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash -327298136, now seen corresponding path program 1 times [2023-04-01 12:26:17,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:17,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637048168] [2023-04-01 12:26:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:17,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:19,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:19,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637048168] [2023-04-01 12:26:19,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637048168] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:19,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:19,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 12:26:19,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18964788] [2023-04-01 12:26:19,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:19,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 12:26:19,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:19,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 12:26:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:26:19,905 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand has 13 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-04-01 12:26:20,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:20,226 INFO L93 Difference]: Finished difference Result 168 states and 187 transitions. [2023-04-01 12:26:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 12:26:20,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 52 [2023-04-01 12:26:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:20,228 INFO L225 Difference]: With dead ends: 168 [2023-04-01 12:26:20,228 INFO L226 Difference]: Without dead ends: 166 [2023-04-01 12:26:20,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:26:20,230 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 35 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:20,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 697 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:26:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-04-01 12:26:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 138. [2023-04-01 12:26:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 68 states have (on average 1.088235294117647) internal successors, (74), 71 states have internal predecessors, (74), 34 states have call successors, (34), 34 states have call predecessors, (34), 35 states have return successors, (36), 32 states have call predecessors, (36), 33 states have call successors, (36) [2023-04-01 12:26:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2023-04-01 12:26:20,282 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 52 [2023-04-01 12:26:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:20,282 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2023-04-01 12:26:20,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.25) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-04-01 12:26:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2023-04-01 12:26:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 12:26:20,290 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:20,291 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:26:20,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:26:20,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:20,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash 594945400, now seen corresponding path program 1 times [2023-04-01 12:26:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:20,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587016107] [2023-04-01 12:26:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:20,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat