/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_floodmax.5.4.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:15:42,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:15:42,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:15:42,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:15:42,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:15:42,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:15:42,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:15:42,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:15:42,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:15:42,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:15:42,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:15:42,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:15:42,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:15:42,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:15:42,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:15:42,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:15:42,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:15:42,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:15:42,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:15:42,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:15:42,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:15:42,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:15:42,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:15:42,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:15:42,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:15:42,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:15:42,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:15:42,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:15:42,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:15:42,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:15:42,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:15:42,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:15:42,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:15:42,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:15:42,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:15:42,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:15:42,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:15:42,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:15:42,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:15:42,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:15:42,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:15:42,498 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 06:15:42,531 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:15:42,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:15:42,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:15:42,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:15:42,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:15:42,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:15:42,533 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:15:42,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:15:42,533 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:15:42,533 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:15:42,533 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:15:42,533 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:15:42,534 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:15:42,534 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:15:42,534 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:15:42,534 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:15:42,534 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:15:42,534 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:15:42,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:15:42,535 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:15:42,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:15:42,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:15:42,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:15:42,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:15:42,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:15:42,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:15:42,536 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:15:42,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:15:42,540 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:15:42,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:15:42,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:15:42,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:15:42,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:15:42,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:15:42,541 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:15:42,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:15:42,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:15:42,542 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:15:42,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:15:42,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:15:42,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:15:42,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:15:42,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:15:42,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:15:42,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:15:42,796 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:15:42,797 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:15:42,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c [2023-04-01 06:15:43,902 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:15:44,131 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:15:44,131 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c [2023-04-01 06:15:44,149 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e86dc3f9/e887831eb94e45f4b1d7502b80f6fc7c/FLAG2ed16063c [2023-04-01 06:15:44,176 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e86dc3f9/e887831eb94e45f4b1d7502b80f6fc7c [2023-04-01 06:15:44,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:15:44,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:15:44,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:15:44,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:15:44,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:15:44,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11711e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44, skipping insertion in model container [2023-04-01 06:15:44,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:15:44,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:15:44,555 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_floodmax.5.4.ufo.BOUNDED-10.pals.c[60917,60930] [2023-04-01 06:15:44,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:15:44,580 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:15:44,648 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_floodmax.5.4.ufo.BOUNDED-10.pals.c[60917,60930] [2023-04-01 06:15:44,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:15:44,664 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:15:44,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44 WrapperNode [2023-04-01 06:15:44,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:15:44,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:15:44,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:15:44,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:15:44,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,782 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:15:44,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:15:44,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:15:44,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:15:44,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44" (1/1) ... [2023-04-01 06:15:44,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:15:44,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:15:44,855 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 06:15:44,872 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 06:15:44,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:15:44,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:15:44,887 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:15:44,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:15:44,888 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 06:15:44,888 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 06:15:44,888 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 06:15:44,888 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 06:15:44,888 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-01 06:15:44,888 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 06:15:44,888 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:15:44,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:15:44,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 06:15:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:15:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:15:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:15:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:15:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:15:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:15:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:15:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:15:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:15:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:15:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:15:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:15:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:15:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:15:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:15:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:15:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:15:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:15:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:15:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:15:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:15:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:15:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:15:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:15:45,115 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:15:45,117 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:15:46,356 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:15:47,325 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:15:47,325 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 06:15:47,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:15:47 BoogieIcfgContainer [2023-04-01 06:15:47,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:15:47,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:15:47,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:15:47,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:15:47,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:15:44" (1/3) ... [2023-04-01 06:15:47,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d476ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:15:47, skipping insertion in model container [2023-04-01 06:15:47,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:15:44" (2/3) ... [2023-04-01 06:15:47,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d476ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:15:47, skipping insertion in model container [2023-04-01 06:15:47,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:15:47" (3/3) ... [2023-04-01 06:15:47,339 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c [2023-04-01 06:15:47,355 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:15:47,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:15:47,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:15:47,425 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;@45eac80a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:15:47,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:15:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 479 states, 455 states have (on average 1.6923076923076923) internal successors, (770), 456 states have internal predecessors, (770), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 06:15:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 06:15:47,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:47,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:15:47,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:47,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1230202245, now seen corresponding path program 1 times [2023-04-01 06:15:47,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:47,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042989969] [2023-04-01 06:15:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:47,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:57,281 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 06:15:57,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:57,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042989969] [2023-04-01 06:15:57,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042989969] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:57,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:57,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 06:15:57,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579620116] [2023-04-01 06:15:57,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:57,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 06:15:57,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 06:15:57,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 06:15:57,324 INFO L87 Difference]: Start difference. First operand has 479 states, 455 states have (on average 1.6923076923076923) internal successors, (770), 456 states have internal predecessors, (770), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 06:16:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:16:01,859 INFO L93 Difference]: Finished difference Result 594 states and 941 transitions. [2023-04-01 06:16:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 06:16:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 160 [2023-04-01 06:16:01,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:16:01,873 INFO L225 Difference]: With dead ends: 594 [2023-04-01 06:16:01,873 INFO L226 Difference]: Without dead ends: 536 [2023-04-01 06:16:01,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 06:16:01,878 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6477 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7271 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6480 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 7470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 7271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 06:16:01,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6480 Valid, 206 Invalid, 7470 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [199 Valid, 7271 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 06:16:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-04-01 06:16:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 510. [2023-04-01 06:16:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.680672268907563) internal successors, (800), 477 states have internal predecessors, (800), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 06:16:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 834 transitions. [2023-04-01 06:16:01,961 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 834 transitions. Word has length 160 [2023-04-01 06:16:01,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:16:01,962 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 834 transitions. [2023-04-01 06:16:01,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 06:16:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 834 transitions. [2023-04-01 06:16:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 06:16:01,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:16:01,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:16:01,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:16:01,965 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:16:01,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:16:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1326141833, now seen corresponding path program 1 times [2023-04-01 06:16:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:16:01,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667266568] [2023-04-01 06:16:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:16:01,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:16:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:16:05,671 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 06:16:05,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:16:05,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667266568] [2023-04-01 06:16:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667266568] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:16:05,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:16:05,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:16:05,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129090632] [2023-04-01 06:16:05,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:16:05,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:16:05,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:16:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:16:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:16:05,683 INFO L87 Difference]: Start difference. First operand 510 states and 834 transitions. Second operand has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:16:08,420 INFO L93 Difference]: Finished difference Result 593 states and 939 transitions. [2023-04-01 06:16:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:16:08,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 161 [2023-04-01 06:16:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:16:08,425 INFO L225 Difference]: With dead ends: 593 [2023-04-01 06:16:08,425 INFO L226 Difference]: Without dead ends: 543 [2023-04-01 06:16:08,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:16:08,427 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 849 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 06:16:08,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 118 Invalid, 6335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 06:16:08,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-04-01 06:16:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 510. [2023-04-01 06:16:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6785714285714286) internal successors, (799), 477 states have internal predecessors, (799), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 06:16:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 832 transitions. [2023-04-01 06:16:08,478 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 832 transitions. Word has length 161 [2023-04-01 06:16:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:16:08,478 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 832 transitions. [2023-04-01 06:16:08,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 832 transitions. [2023-04-01 06:16:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 06:16:08,480 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:16:08,480 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:16:08,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:16:08,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:16:08,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:16:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1101409636, now seen corresponding path program 1 times [2023-04-01 06:16:08,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:16:08,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622905802] [2023-04-01 06:16:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:16:08,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:16:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:16:12,122 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 06:16:12,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:16:12,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622905802] [2023-04-01 06:16:12,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622905802] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:16:12,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:16:12,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:16:12,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508443341] [2023-04-01 06:16:12,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:16:12,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:16:12,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:16:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:16:12,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:16:12,127 INFO L87 Difference]: Start difference. First operand 510 states and 832 transitions. Second operand has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:16:14,434 INFO L93 Difference]: Finished difference Result 587 states and 923 transitions. [2023-04-01 06:16:14,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:16:14,434 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 162 [2023-04-01 06:16:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:16:14,437 INFO L225 Difference]: With dead ends: 587 [2023-04-01 06:16:14,437 INFO L226 Difference]: Without dead ends: 542 [2023-04-01 06:16:14,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:16:14,442 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 854 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 5542 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 5575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:16:14,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 111 Invalid, 5575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 5542 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 06:16:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-04-01 06:16:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 510. [2023-04-01 06:16:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6764705882352942) internal successors, (798), 477 states have internal predecessors, (798), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 06:16:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 831 transitions. [2023-04-01 06:16:14,485 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 831 transitions. Word has length 162 [2023-04-01 06:16:14,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:16:14,486 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 831 transitions. [2023-04-01 06:16:14,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 831 transitions. [2023-04-01 06:16:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 06:16:14,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:16:14,490 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:16:14,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:16:14,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:16:14,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:16:14,491 INFO L85 PathProgramCache]: Analyzing trace with hash 152805248, now seen corresponding path program 1 times [2023-04-01 06:16:14,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:16:14,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411506724] [2023-04-01 06:16:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:16:14,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:16:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:16:17,834 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 06:16:17,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:16:17,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411506724] [2023-04-01 06:16:17,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411506724] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:16:17,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:16:17,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:16:17,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111950861] [2023-04-01 06:16:17,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:16:17,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:16:17,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:16:17,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:16:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:16:17,837 INFO L87 Difference]: Start difference. First operand 510 states and 831 transitions. Second operand has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:16:20,050 INFO L93 Difference]: Finished difference Result 593 states and 928 transitions. [2023-04-01 06:16:20,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:16:20,051 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 163 [2023-04-01 06:16:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:16:20,053 INFO L225 Difference]: With dead ends: 593 [2023-04-01 06:16:20,053 INFO L226 Difference]: Without dead ends: 548 [2023-04-01 06:16:20,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:16:20,055 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1655 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 5542 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 5610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 5542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:16:20,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1662 Valid, 105 Invalid, 5610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 5542 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 06:16:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-04-01 06:16:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 510. [2023-04-01 06:16:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6743697478991597) internal successors, (797), 477 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 06:16:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 830 transitions. [2023-04-01 06:16:20,088 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 830 transitions. Word has length 163 [2023-04-01 06:16:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:16:20,088 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 830 transitions. [2023-04-01 06:16:20,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 830 transitions. [2023-04-01 06:16:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-01 06:16:20,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:16:20,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:16:20,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:16:20,090 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:16:20,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:16:20,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1917551693, now seen corresponding path program 1 times [2023-04-01 06:16:20,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:16:20,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927216573] [2023-04-01 06:16:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:16:20,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:16:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:16:23,430 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 06:16:23,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:16:23,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927216573] [2023-04-01 06:16:23,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927216573] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:16:23,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:16:23,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:16:23,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549058515] [2023-04-01 06:16:23,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:16:23,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:16:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:16:23,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:16:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:16:23,435 INFO L87 Difference]: Start difference. First operand 510 states and 830 transitions. Second operand has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:16:25,663 INFO L93 Difference]: Finished difference Result 599 states and 933 transitions. [2023-04-01 06:16:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:16:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 164 [2023-04-01 06:16:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:16:25,666 INFO L225 Difference]: With dead ends: 599 [2023-04-01 06:16:25,666 INFO L226 Difference]: Without dead ends: 554 [2023-04-01 06:16:25,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:16:25,667 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1656 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 5559 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 5619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 5559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:16:25,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 107 Invalid, 5619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 5559 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 06:16:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-04-01 06:16:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 510. [2023-04-01 06:16:25,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6722689075630253) internal successors, (796), 477 states have internal predecessors, (796), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 06:16:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 829 transitions. [2023-04-01 06:16:25,706 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 829 transitions. Word has length 164 [2023-04-01 06:16:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:16:25,707 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 829 transitions. [2023-04-01 06:16:25,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 829 transitions. [2023-04-01 06:16:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-01 06:16:25,708 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:16:25,708 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:16:25,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:16:25,709 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:16:25,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:16:25,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1896828041, now seen corresponding path program 1 times [2023-04-01 06:16:25,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:16:25,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198636939] [2023-04-01 06:16:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:16:25,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:16:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:16:29,073 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 06:16:29,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:16:29,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198636939] [2023-04-01 06:16:29,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198636939] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:16:29,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:16:29,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:16:29,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924942475] [2023-04-01 06:16:29,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:16:29,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:16:29,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:16:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:16:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:16:29,075 INFO L87 Difference]: Start difference. First operand 510 states and 829 transitions. Second operand has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:16:31,469 INFO L93 Difference]: Finished difference Result 605 states and 938 transitions. [2023-04-01 06:16:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:16:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 165 [2023-04-01 06:16:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:16:31,472 INFO L225 Difference]: With dead ends: 605 [2023-04-01 06:16:31,472 INFO L226 Difference]: Without dead ends: 560 [2023-04-01 06:16:31,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:16:31,474 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 877 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 5596 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 5654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 5596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:16:31,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 117 Invalid, 5654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 5596 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 06:16:31,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-04-01 06:16:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 510. [2023-04-01 06:16:31,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6701680672268908) internal successors, (795), 477 states have internal predecessors, (795), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 06:16:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 828 transitions. [2023-04-01 06:16:31,512 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 828 transitions. Word has length 165 [2023-04-01 06:16:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:16:31,512 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 828 transitions. [2023-04-01 06:16:31,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:16:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 828 transitions. [2023-04-01 06:16:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-01 06:16:31,514 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:16:31,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:16:31,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:16:31,514 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:16:31,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:16:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2000872911, now seen corresponding path program 1 times [2023-04-01 06:16:31,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:16:31,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730411491] [2023-04-01 06:16:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:16:31,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:16:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat