/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-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:21:13,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:21:13,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:21:13,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:21:13,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:21:13,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:21:13,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:21:13,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:21:13,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:21:13,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:21:13,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:21:13,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:21:13,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:21:13,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:21:13,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:21:13,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:21:13,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:21:13,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:21:13,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:21:13,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:21:13,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:21:13,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:21:13,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:21:13,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:21:13,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:21:13,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:21:13,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:21:13,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:21:13,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:21:13,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:21:13,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:21:13,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:21:13,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:21:13,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:21:13,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:21:13,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:21:13,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:21:13,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:21:13,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:21:13,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:21:13,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:21:13,706 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:21:13,743 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:21:13,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:21:13,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:21:13,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:21:13,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:21:13,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:21:13,744 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:21:13,744 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:21:13,745 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:21:13,745 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:21:13,745 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:21:13,745 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:21:13,745 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:21:13,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:21:13,746 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:21:13,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:21:13,746 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:21:13,746 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:21:13,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:21:13,746 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:21:13,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:21:13,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:21:13,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:21:13,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:21:13,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:21:13,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:21:13,747 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:21:13,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:21:13,747 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:21:13,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:21:13,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:21:13,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:21:13,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:21:13,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:21:13,748 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:21:13,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:21:13,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:21:13,748 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:21:13,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:21:13,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:21:13,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:21:13,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:21:14,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:21:14,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:21:14,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:21:14,141 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:21:14,142 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:21:14,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:21:15,247 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:21:15,413 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:21:15,413 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:21:15,420 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4af0f1606/31c73c04794f418f9f9b72ecab3f07b3/FLAG0071e32f1 [2023-04-03 02:21:15,435 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4af0f1606/31c73c04794f418f9f9b72ecab3f07b3 [2023-04-03 02:21:15,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:21:15,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:21:15,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:21:15,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:21:15,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:21:15,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79684aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15, skipping insertion in model container [2023-04-03 02:21:15,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:21:15,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:21:15,660 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-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2023-04-03 02:21:15,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:21:15,707 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:21:15,753 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-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2023-04-03 02:21:15,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:21:15,792 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:21:15,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15 WrapperNode [2023-04-03 02:21:15,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:21:15,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:21:15,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:21:15,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:21:15,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,830 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:21:15,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:21:15,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:21:15,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:21:15,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15" (1/1) ... [2023-04-03 02:21:15,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:21:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:15,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:21:15,872 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 [2023-04-03 02:21:15,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:21:15,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:21:15,912 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:21:15,913 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:21:15,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:21:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:21:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:21:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:21:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:21:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:21:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:21:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:21:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:21:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:21:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:21:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:21:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:21:16,008 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:21:16,010 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:21:16,508 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:21:16,655 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:21:16,655 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:21:16,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:21:16 BoogieIcfgContainer [2023-04-03 02:21:16,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:21:16,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:21:16,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:21:16,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:21:16,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:21:15" (1/3) ... [2023-04-03 02:21:16,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230b3bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:21:16, skipping insertion in model container [2023-04-03 02:21:16,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:15" (2/3) ... [2023-04-03 02:21:16,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230b3bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:21:16, skipping insertion in model container [2023-04-03 02:21:16,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:21:16" (3/3) ... [2023-04-03 02:21:16,665 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:21:16,678 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:21:16,678 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:21:16,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:21:16,732 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@91789f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:21:16,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:21:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 86 states have (on average 1.755813953488372) internal successors, (151), 93 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:21:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-03 02:21:16,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:16,745 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] [2023-04-03 02:21:16,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:16,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:16,749 INFO L85 PathProgramCache]: Analyzing trace with hash -285522315, now seen corresponding path program 1 times [2023-04-03 02:21:16,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:16,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723364021] [2023-04-03 02:21:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:16,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:17,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:17,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723364021] [2023-04-03 02:21:17,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723364021] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:17,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:17,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:17,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845334941] [2023-04-03 02:21:17,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:17,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:17,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:17,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:17,241 INFO L87 Difference]: Start difference. First operand has 98 states, 86 states have (on average 1.755813953488372) internal successors, (151), 93 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:17,351 INFO L93 Difference]: Finished difference Result 216 states and 324 transitions. [2023-04-03 02:21:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-03 02:21:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:17,362 INFO L225 Difference]: With dead ends: 216 [2023-04-03 02:21:17,362 INFO L226 Difference]: Without dead ends: 131 [2023-04-03 02:21:17,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:17,369 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 96 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:17,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 334 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:17,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-03 02:21:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-04-03 02:21:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.416) internal successors, (177), 125 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 180 transitions. [2023-04-03 02:21:17,431 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 180 transitions. Word has length 41 [2023-04-03 02:21:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:17,432 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 180 transitions. [2023-04-03 02:21:17,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 180 transitions. [2023-04-03 02:21:17,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:21:17,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:17,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:17,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:21:17,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:17,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:17,435 INFO L85 PathProgramCache]: Analyzing trace with hash 155439974, now seen corresponding path program 1 times [2023-04-03 02:21:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:17,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77665151] [2023-04-03 02:21:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:17,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:17,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:17,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77665151] [2023-04-03 02:21:17,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77665151] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:17,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:17,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:17,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260709877] [2023-04-03 02:21:17,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:17,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:17,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:17,613 INFO L87 Difference]: Start difference. First operand 129 states and 180 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:17,692 INFO L93 Difference]: Finished difference Result 280 states and 411 transitions. [2023-04-03 02:21:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:17,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-04-03 02:21:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:17,698 INFO L225 Difference]: With dead ends: 280 [2023-04-03 02:21:17,702 INFO L226 Difference]: Without dead ends: 184 [2023-04-03 02:21:17,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:17,703 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 79 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:17,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 186 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-03 02:21:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2023-04-03 02:21:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.4382022471910112) internal successors, (256), 178 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 259 transitions. [2023-04-03 02:21:17,718 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 259 transitions. Word has length 43 [2023-04-03 02:21:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:17,718 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 259 transitions. [2023-04-03 02:21:17,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 259 transitions. [2023-04-03 02:21:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 02:21:17,721 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:17,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:17,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:21:17,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:17,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:17,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2142942349, now seen corresponding path program 1 times [2023-04-03 02:21:17,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:17,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700741610] [2023-04-03 02:21:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:17,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:17,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:17,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700741610] [2023-04-03 02:21:17,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700741610] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:17,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:17,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:17,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370574444] [2023-04-03 02:21:17,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:17,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:17,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:17,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:17,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:17,803 INFO L87 Difference]: Start difference. First operand 182 states and 259 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:17,853 INFO L93 Difference]: Finished difference Result 442 states and 652 transitions. [2023-04-03 02:21:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:17,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-03 02:21:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:17,855 INFO L225 Difference]: With dead ends: 442 [2023-04-03 02:21:17,855 INFO L226 Difference]: Without dead ends: 294 [2023-04-03 02:21:17,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:17,862 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 79 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:17,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 235 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-04-03 02:21:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2023-04-03 02:21:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 288 states have (on average 1.4583333333333333) internal successors, (420), 288 states have internal predecessors, (420), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 423 transitions. [2023-04-03 02:21:17,899 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 423 transitions. Word has length 45 [2023-04-03 02:21:17,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:17,899 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 423 transitions. [2023-04-03 02:21:17,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 423 transitions. [2023-04-03 02:21:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 02:21:17,904 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:17,904 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] [2023-04-03 02:21:17,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:21:17,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:17,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:17,905 INFO L85 PathProgramCache]: Analyzing trace with hash -340698257, now seen corresponding path program 1 times [2023-04-03 02:21:17,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:17,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104582582] [2023-04-03 02:21:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:17,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:17,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:17,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104582582] [2023-04-03 02:21:17,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104582582] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:17,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:17,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:17,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349274973] [2023-04-03 02:21:17,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:17,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:17,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:17,997 INFO L87 Difference]: Start difference. First operand 292 states and 423 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:18,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:18,057 INFO L93 Difference]: Finished difference Result 711 states and 1056 transitions. [2023-04-03 02:21:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-03 02:21:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:18,062 INFO L225 Difference]: With dead ends: 711 [2023-04-03 02:21:18,062 INFO L226 Difference]: Without dead ends: 453 [2023-04-03 02:21:18,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:18,071 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 78 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:18,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 203 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-04-03 02:21:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2023-04-03 02:21:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 447 states have (on average 1.476510067114094) internal successors, (660), 447 states have internal predecessors, (660), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 663 transitions. [2023-04-03 02:21:18,106 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 663 transitions. Word has length 47 [2023-04-03 02:21:18,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:18,107 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 663 transitions. [2023-04-03 02:21:18,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 663 transitions. [2023-04-03 02:21:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-03 02:21:18,109 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:18,109 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] [2023-04-03 02:21:18,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:21:18,109 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:18,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:18,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1823786302, now seen corresponding path program 1 times [2023-04-03 02:21:18,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:18,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090193720] [2023-04-03 02:21:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:18,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:18,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090193720] [2023-04-03 02:21:18,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090193720] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:18,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:18,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:18,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770962420] [2023-04-03 02:21:18,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:18,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:18,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:18,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:18,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:18,198 INFO L87 Difference]: Start difference. First operand 451 states and 663 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:18,296 INFO L93 Difference]: Finished difference Result 1151 states and 1712 transitions. [2023-04-03 02:21:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-04-03 02:21:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:18,315 INFO L225 Difference]: With dead ends: 1151 [2023-04-03 02:21:18,315 INFO L226 Difference]: Without dead ends: 747 [2023-04-03 02:21:18,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:18,317 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 74 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:18,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 216 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2023-04-03 02:21:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 745. [2023-04-03 02:21:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 741 states have (on average 1.4696356275303644) internal successors, (1089), 741 states have internal predecessors, (1089), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1092 transitions. [2023-04-03 02:21:18,393 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1092 transitions. Word has length 49 [2023-04-03 02:21:18,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:18,394 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1092 transitions. [2023-04-03 02:21:18,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1092 transitions. [2023-04-03 02:21:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:21:18,396 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:18,396 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] [2023-04-03 02:21:18,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:21:18,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:18,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1467766441, now seen corresponding path program 1 times [2023-04-03 02:21:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:18,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907965932] [2023-04-03 02:21:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:18,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:18,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:18,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907965932] [2023-04-03 02:21:18,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907965932] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:18,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:18,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:18,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186680146] [2023-04-03 02:21:18,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:18,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:18,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:18,477 INFO L87 Difference]: Start difference. First operand 745 states and 1092 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:18,606 INFO L93 Difference]: Finished difference Result 1860 states and 2760 transitions. [2023-04-03 02:21:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-03 02:21:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:18,612 INFO L225 Difference]: With dead ends: 1860 [2023-04-03 02:21:18,612 INFO L226 Difference]: Without dead ends: 1162 [2023-04-03 02:21:18,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:18,615 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 73 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:18,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 205 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2023-04-03 02:21:18,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1160. [2023-04-03 02:21:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1156 states have (on average 1.4775086505190311) internal successors, (1708), 1156 states have internal predecessors, (1708), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1711 transitions. [2023-04-03 02:21:18,754 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1711 transitions. Word has length 51 [2023-04-03 02:21:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:18,754 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1711 transitions. [2023-04-03 02:21:18,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1711 transitions. [2023-04-03 02:21:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:21:18,755 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:18,755 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] [2023-04-03 02:21:18,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:21:18,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:18,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1266528778, now seen corresponding path program 1 times [2023-04-03 02:21:18,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:18,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901085602] [2023-04-03 02:21:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:18,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:18,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:18,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901085602] [2023-04-03 02:21:18,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901085602] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:18,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:18,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:18,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195044118] [2023-04-03 02:21:18,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:18,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:18,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:18,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:18,854 INFO L87 Difference]: Start difference. First operand 1160 states and 1711 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:19,127 INFO L93 Difference]: Finished difference Result 2935 states and 4364 transitions. [2023-04-03 02:21:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:21:19,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-03 02:21:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:19,133 INFO L225 Difference]: With dead ends: 2935 [2023-04-03 02:21:19,133 INFO L226 Difference]: Without dead ends: 1817 [2023-04-03 02:21:19,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:21:19,136 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 435 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:19,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 807 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:21:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2023-04-03 02:21:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1791. [2023-04-03 02:21:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1787 states have (on average 1.4868494683827644) internal successors, (2657), 1787 states have internal predecessors, (2657), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2660 transitions. [2023-04-03 02:21:19,303 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2660 transitions. Word has length 53 [2023-04-03 02:21:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:19,303 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2660 transitions. [2023-04-03 02:21:19,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2660 transitions. [2023-04-03 02:21:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:21:19,304 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:19,304 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] [2023-04-03 02:21:19,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:21:19,304 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:19,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash -669296904, now seen corresponding path program 1 times [2023-04-03 02:21:19,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:19,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337963043] [2023-04-03 02:21:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:19,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:19,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:19,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337963043] [2023-04-03 02:21:19,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337963043] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:19,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:19,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:21:19,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705920826] [2023-04-03 02:21:19,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:19,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:21:19,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:21:19,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:21:19,371 INFO L87 Difference]: Start difference. First operand 1791 states and 2660 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:19,587 INFO L93 Difference]: Finished difference Result 3524 states and 5249 transitions. [2023-04-03 02:21:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:21:19,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-03 02:21:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:19,593 INFO L225 Difference]: With dead ends: 3524 [2023-04-03 02:21:19,593 INFO L226 Difference]: Without dead ends: 1793 [2023-04-03 02:21:19,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:19,597 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 144 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:19,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 299 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:21:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2023-04-03 02:21:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1788. [2023-04-03 02:21:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1784 states have (on average 1.4809417040358743) internal successors, (2642), 1784 states have internal predecessors, (2642), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2645 transitions. [2023-04-03 02:21:19,768 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2645 transitions. Word has length 54 [2023-04-03 02:21:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:19,768 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 2645 transitions. [2023-04-03 02:21:19,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2645 transitions. [2023-04-03 02:21:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:21:19,769 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:19,769 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] [2023-04-03 02:21:19,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:21:19,769 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:19,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:19,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1488720500, now seen corresponding path program 1 times [2023-04-03 02:21:19,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:19,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552645457] [2023-04-03 02:21:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:19,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:19,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:19,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552645457] [2023-04-03 02:21:19,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552645457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:19,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:19,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:19,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390305655] [2023-04-03 02:21:19,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:19,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:19,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:19,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:19,985 INFO L87 Difference]: Start difference. First operand 1788 states and 2645 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:20,262 INFO L93 Difference]: Finished difference Result 2956 states and 4320 transitions. [2023-04-03 02:21:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:21:20,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-03 02:21:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:20,272 INFO L225 Difference]: With dead ends: 2956 [2023-04-03 02:21:20,272 INFO L226 Difference]: Without dead ends: 2954 [2023-04-03 02:21:20,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:21:20,273 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 146 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:20,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 584 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:20,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2023-04-03 02:21:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 1832. [2023-04-03 02:21:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1828 states have (on average 1.4567833698030634) internal successors, (2663), 1828 states have internal predecessors, (2663), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 2666 transitions. [2023-04-03 02:21:20,500 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 2666 transitions. Word has length 62 [2023-04-03 02:21:20,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:20,500 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 2666 transitions. [2023-04-03 02:21:20,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 2666 transitions. [2023-04-03 02:21:20,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 02:21:20,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:20,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:20,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:21:20,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:20,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:20,502 INFO L85 PathProgramCache]: Analyzing trace with hash -954306733, now seen corresponding path program 1 times [2023-04-03 02:21:20,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:20,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464996144] [2023-04-03 02:21:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:20,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:21:21,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:21,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464996144] [2023-04-03 02:21:21,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464996144] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:21,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035178196] [2023-04-03 02:21:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:21,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:21,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:21,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:21:21,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:21:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:21,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:21:21,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:21:22,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:22,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035178196] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:22,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:22,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:21:22,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519618503] [2023-04-03 02:21:22,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:22,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:22,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:22,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:21:22,044 INFO L87 Difference]: Start difference. First operand 1832 states and 2666 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:22,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:22,825 INFO L93 Difference]: Finished difference Result 5276 states and 7704 transitions. [2023-04-03 02:21:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:22,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-03 02:21:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:22,837 INFO L225 Difference]: With dead ends: 5276 [2023-04-03 02:21:22,837 INFO L226 Difference]: Without dead ends: 3504 [2023-04-03 02:21:22,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:21:22,842 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 246 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:22,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 298 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2023-04-03 02:21:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 3502. [2023-04-03 02:21:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3498 states have (on average 1.452544311034877) internal successors, (5081), 3498 states have internal predecessors, (5081), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 5084 transitions. [2023-04-03 02:21:23,340 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 5084 transitions. Word has length 69 [2023-04-03 02:21:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:23,340 INFO L495 AbstractCegarLoop]: Abstraction has 3502 states and 5084 transitions. [2023-04-03 02:21:23,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 5084 transitions. [2023-04-03 02:21:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:21:23,341 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:23,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:23,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 02:21:23,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-03 02:21:23,551 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:23,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1917808232, now seen corresponding path program 1 times [2023-04-03 02:21:23,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:23,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208821338] [2023-04-03 02:21:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:23,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:21:24,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:24,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208821338] [2023-04-03 02:21:24,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208821338] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:24,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883944160] [2023-04-03 02:21:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:24,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:24,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:24,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:21:24,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:21:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:24,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:21:24,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:21:24,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:24,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883944160] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:24,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:24,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:21:24,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709725925] [2023-04-03 02:21:24,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:24,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:24,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:24,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:24,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:21:24,777 INFO L87 Difference]: Start difference. First operand 3502 states and 5084 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:25,792 INFO L93 Difference]: Finished difference Result 10137 states and 14732 transitions. [2023-04-03 02:21:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-03 02:21:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:25,815 INFO L225 Difference]: With dead ends: 10137 [2023-04-03 02:21:25,815 INFO L226 Difference]: Without dead ends: 6680 [2023-04-03 02:21:25,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:21:25,822 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 259 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:25,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 297 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2023-04-03 02:21:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6678. [2023-04-03 02:21:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6678 states, 6674 states have (on average 1.4420137848366796) internal successors, (9624), 6674 states have internal predecessors, (9624), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 9627 transitions. [2023-04-03 02:21:26,683 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 9627 transitions. Word has length 72 [2023-04-03 02:21:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:26,683 INFO L495 AbstractCegarLoop]: Abstraction has 6678 states and 9627 transitions. [2023-04-03 02:21:26,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 9627 transitions. [2023-04-03 02:21:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:21:26,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:26,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:26,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-03 02:21:26,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-03 02:21:26,894 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:26,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:26,895 INFO L85 PathProgramCache]: Analyzing trace with hash -70523277, now seen corresponding path program 1 times [2023-04-03 02:21:26,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:26,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117780559] [2023-04-03 02:21:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:26,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:21:27,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:27,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117780559] [2023-04-03 02:21:27,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117780559] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:27,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826538194] [2023-04-03 02:21:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:27,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:27,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:27,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:21:27,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:21:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:27,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:21:27,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:21:27,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:27,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826538194] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:27,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:27,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:21:27,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784288627] [2023-04-03 02:21:27,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:27,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:27,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:21:27,967 INFO L87 Difference]: Start difference. First operand 6678 states and 9627 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:29,909 INFO L93 Difference]: Finished difference Result 19428 states and 28009 transitions. [2023-04-03 02:21:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:29,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:21:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:29,960 INFO L225 Difference]: With dead ends: 19428 [2023-04-03 02:21:29,960 INFO L226 Difference]: Without dead ends: 12822 [2023-04-03 02:21:29,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:21:29,972 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 249 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:29,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 299 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12822 states. [2023-04-03 02:21:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12822 to 12820. [2023-04-03 02:21:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12820 states, 12816 states have (on average 1.4318039950062422) internal successors, (18350), 12816 states have internal predecessors, (18350), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12820 states to 12820 states and 18353 transitions. [2023-04-03 02:21:31,983 INFO L78 Accepts]: Start accepts. Automaton has 12820 states and 18353 transitions. Word has length 75 [2023-04-03 02:21:31,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:31,983 INFO L495 AbstractCegarLoop]: Abstraction has 12820 states and 18353 transitions. [2023-04-03 02:21:31,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 12820 states and 18353 transitions. [2023-04-03 02:21:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:21:31,985 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:31,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:31,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 02:21:32,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:32,191 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:32,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1438491322, now seen corresponding path program 1 times [2023-04-03 02:21:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:32,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352442535] [2023-04-03 02:21:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:32,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:21:32,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:32,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352442535] [2023-04-03 02:21:32,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352442535] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:32,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717993934] [2023-04-03 02:21:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:32,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:32,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:32,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:21:32,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 02:21:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:32,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-03 02:21:32,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:21:33,365 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:33,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717993934] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:33,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:33,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-04-03 02:21:33,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981092906] [2023-04-03 02:21:33,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:33,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:21:33,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:33,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:21:33,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:21:33,368 INFO L87 Difference]: Start difference. First operand 12820 states and 18353 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:34,939 INFO L93 Difference]: Finished difference Result 22690 states and 32422 transitions. [2023-04-03 02:21:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:34,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-03 02:21:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:34,965 INFO L225 Difference]: With dead ends: 22690 [2023-04-03 02:21:34,965 INFO L226 Difference]: Without dead ends: 9950 [2023-04-03 02:21:34,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:21:34,991 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 506 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:34,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 221 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:34,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9950 states. [2023-04-03 02:21:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9950 to 9889. [2023-04-03 02:21:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9889 states, 9885 states have (on average 1.4267071320182094) internal successors, (14103), 9885 states have internal predecessors, (14103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 14106 transitions. [2023-04-03 02:21:36,425 INFO L78 Accepts]: Start accepts. Automaton has 9889 states and 14106 transitions. Word has length 78 [2023-04-03 02:21:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:36,426 INFO L495 AbstractCegarLoop]: Abstraction has 9889 states and 14106 transitions. [2023-04-03 02:21:36,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 9889 states and 14106 transitions. [2023-04-03 02:21:36,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:21:36,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:36,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:36,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-03 02:21:36,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:36,634 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:36,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1390334385, now seen corresponding path program 1 times [2023-04-03 02:21:36,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:36,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123520463] [2023-04-03 02:21:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:36,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:21:36,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:36,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123520463] [2023-04-03 02:21:36,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123520463] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:36,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:36,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:36,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559535523] [2023-04-03 02:21:36,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:36,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:36,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:36,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:36,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:36,755 INFO L87 Difference]: Start difference. First operand 9889 states and 14106 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:38,491 INFO L93 Difference]: Finished difference Result 19719 states and 28141 transitions. [2023-04-03 02:21:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:38,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-03 02:21:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:38,514 INFO L225 Difference]: With dead ends: 19719 [2023-04-03 02:21:38,514 INFO L226 Difference]: Without dead ends: 9889 [2023-04-03 02:21:38,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:21:38,534 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 269 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:38,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 106 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9889 states. [2023-04-03 02:21:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9889 to 9889. [2023-04-03 02:21:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9889 states, 9885 states have (on average 1.3969650986342943) internal successors, (13809), 9885 states have internal predecessors, (13809), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 13812 transitions. [2023-04-03 02:21:40,129 INFO L78 Accepts]: Start accepts. Automaton has 9889 states and 13812 transitions. Word has length 78 [2023-04-03 02:21:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:40,129 INFO L495 AbstractCegarLoop]: Abstraction has 9889 states and 13812 transitions. [2023-04-03 02:21:40,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9889 states and 13812 transitions. [2023-04-03 02:21:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:21:40,131 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:40,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:40,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:21:40,131 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:40,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:40,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1385675092, now seen corresponding path program 1 times [2023-04-03 02:21:40,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:40,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827465279] [2023-04-03 02:21:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:40,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:21:40,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:40,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827465279] [2023-04-03 02:21:40,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827465279] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:40,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917676236] [2023-04-03 02:21:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:40,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:40,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:40,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:21:40,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 02:21:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:40,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-03 02:21:40,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:21:41,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:21:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:45,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917676236] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:21:45,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [212406124] [2023-04-03 02:21:45,794 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2023-04-03 02:21:45,794 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:21:45,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:21:45,800 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:21:45,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:21:46,556 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 190 for LOIs [2023-04-03 02:21:49,102 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12