/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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:24:08,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:24:08,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:24:08,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 03:24:08,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 03:24:08,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 03:24:08,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 03:24:08,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 03:24:08,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 03:24:08,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 03:24:08,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 03:24:08,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 03:24:08,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:24:08,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:24:08,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:24:08,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:24:08,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:24:08,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:24:08,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:24:08,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:24:08,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:24:08,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:24:08,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:24:08,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:24:08,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:24:08,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:24:08,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:24:08,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:24:08,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:24:08,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 03:24:08,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 03:24:08,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 03:24:08,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 03:24:08,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 03:24:08,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 03:24:08,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 03:24:08,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 03:24:08,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 03:24:08,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:24:08,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:24:08,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:24:08,769 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 03:24:08,791 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:24:08,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:24:08,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:24:08,792 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:24:08,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:24:08,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:24:08,792 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:24:08,793 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:24:08,793 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:24:08,793 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:24:08,793 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:24:08,793 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:24:08,793 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:24:08,794 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:24:08,794 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:24:08,794 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:24:08,794 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:24:08,794 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:24:08,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:24:08,794 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:24:08,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:24:08,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:24:08,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:24:08,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:24:08,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:24:08,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:24:08,795 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:24:08,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:24:08,795 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:24:08,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:24:08,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:24:08,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:24:08,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:24:08,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:24:08,796 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:24:08,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:24:08,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:24:08,796 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:24:08,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:24:08,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:24:08,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:24:08,797 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:24:09,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:24:09,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:24:09,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:24:09,044 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:24:09,044 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:24:09,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:24:10,241 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:24:10,427 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:24:10,431 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:24:10,439 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d61a0bd/e92a5294058642a09bc0aa5166d72658/FLAG568105d92 [2023-04-03 03:24:10,450 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d61a0bd/e92a5294058642a09bc0aa5166d72658 [2023-04-03 03:24:10,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:24:10,453 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:24:10,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:24:10,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:24:10,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:24:10,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108a9073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10, skipping insertion in model container [2023-04-03 03:24:10,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:24:10,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:24:10,647 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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-03 03:24:10,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:24:10,688 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:24:10,723 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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-03 03:24:10,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:24:10,764 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:24:10,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10 WrapperNode [2023-04-03 03:24:10,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:24:10,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:24:10,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:24:10,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:24:10,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,810 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:24:10,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:24:10,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:24:10,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:24:10,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10" (1/1) ... [2023-04-03 03:24:10,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:24:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:24:10,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 03:24:10,858 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 03:24:10,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:24:10,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:24:10,883 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:24:10,883 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:24:10,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:24:10,883 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:24:10,883 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:24:10,883 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:24:10,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:24:10,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:24:10,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 03:24:10,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:24:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:24:10,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:24:10,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:24:10,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:24:10,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:24:11,021 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:24:11,023 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:24:11,602 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:24:11,823 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:24:11,823 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:24:11,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:24:11 BoogieIcfgContainer [2023-04-03 03:24:11,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:24:11,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:24:11,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:24:11,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:24:11,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:24:10" (1/3) ... [2023-04-03 03:24:11,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3075ec81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:24:11, skipping insertion in model container [2023-04-03 03:24:11,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:24:10" (2/3) ... [2023-04-03 03:24:11,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3075ec81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:24:11, skipping insertion in model container [2023-04-03 03:24:11,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:24:11" (3/3) ... [2023-04-03 03:24:11,833 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:24:11,844 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:24:11,845 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:24:11,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:24:11,890 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;@2c281c16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:24:11,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:24:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 98 states have (on average 1.7551020408163265) internal successors, (172), 105 states have internal predecessors, (172), 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 03:24:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 03:24:11,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:11,903 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 03:24:11,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:11,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:11,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1843659318, now seen corresponding path program 1 times [2023-04-03 03:24:11,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:11,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237261944] [2023-04-03 03:24:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:11,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:12,297 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 03:24:12,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237261944] [2023-04-03 03:24:12,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237261944] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:12,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:12,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:24:12,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021832759] [2023-04-03 03:24:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:12,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:24:12,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:24:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:24:12,344 INFO L87 Difference]: Start difference. First operand has 110 states, 98 states have (on average 1.7551020408163265) internal successors, (172), 105 states have internal predecessors, (172), 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 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 03:24:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:12,464 INFO L93 Difference]: Finished difference Result 244 states and 371 transitions. [2023-04-03 03:24:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:24:12,469 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 03:24:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:12,480 INFO L225 Difference]: With dead ends: 244 [2023-04-03 03:24:12,480 INFO L226 Difference]: Without dead ends: 150 [2023-04-03 03:24:12,483 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 03:24:12,487 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 113 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:24:12,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 376 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:24:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-04-03 03:24:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2023-04-03 03:24:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.4305555555555556) internal successors, (206), 144 states have internal predecessors, (206), 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 03:24:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2023-04-03 03:24:12,555 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 47 [2023-04-03 03:24:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:12,556 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2023-04-03 03:24:12,556 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 03:24:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2023-04-03 03:24:12,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-03 03:24:12,559 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:12,560 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 03:24:12,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:24:12,560 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:12,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:12,561 INFO L85 PathProgramCache]: Analyzing trace with hash 448384753, now seen corresponding path program 1 times [2023-04-03 03:24:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:12,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72737387] [2023-04-03 03:24:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:12,766 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 03:24:12,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:12,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72737387] [2023-04-03 03:24:12,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72737387] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:12,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:12,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:24:12,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512248467] [2023-04-03 03:24:12,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:12,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:24:12,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:12,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:24:12,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:24:12,771 INFO L87 Difference]: Start difference. First operand 148 states and 209 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 03:24:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:12,854 INFO L93 Difference]: Finished difference Result 313 states and 462 transitions. [2023-04-03 03:24:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:24:12,854 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 03:24:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:12,855 INFO L225 Difference]: With dead ends: 313 [2023-04-03 03:24:12,856 INFO L226 Difference]: Without dead ends: 201 [2023-04-03 03:24:12,856 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 03:24:12,857 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 93 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:24:12,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 199 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-04-03 03:24:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2023-04-03 03:24:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 195 states have (on average 1.441025641025641) internal successors, (281), 195 states have internal predecessors, (281), 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 03:24:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 284 transitions. [2023-04-03 03:24:12,887 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 284 transitions. Word has length 49 [2023-04-03 03:24:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:12,888 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 284 transitions. [2023-04-03 03:24:12,888 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 03:24:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 284 transitions. [2023-04-03 03:24:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 03:24:12,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:12,894 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 03:24:12,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:24:12,894 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:12,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1705082450, now seen corresponding path program 1 times [2023-04-03 03:24:12,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:12,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050864698] [2023-04-03 03:24:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:12,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:13,022 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 03:24:13,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:13,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050864698] [2023-04-03 03:24:13,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050864698] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:13,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:13,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:24:13,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371313143] [2023-04-03 03:24:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:13,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:24:13,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:24:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:24:13,026 INFO L87 Difference]: Start difference. First operand 199 states and 284 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 03:24:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:13,081 INFO L93 Difference]: Finished difference Result 479 states and 707 transitions. [2023-04-03 03:24:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:24:13,082 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 03:24:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:13,087 INFO L225 Difference]: With dead ends: 479 [2023-04-03 03:24:13,087 INFO L226 Difference]: Without dead ends: 318 [2023-04-03 03:24:13,092 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 03:24:13,094 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 92 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 269 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 03:24:13,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 269 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-04-03 03:24:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2023-04-03 03:24:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 312 states have (on average 1.455128205128205) internal successors, (454), 312 states have internal predecessors, (454), 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 03:24:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 457 transitions. [2023-04-03 03:24:13,121 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 457 transitions. Word has length 51 [2023-04-03 03:24:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:13,122 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 457 transitions. [2023-04-03 03:24:13,122 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 03:24:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 457 transitions. [2023-04-03 03:24:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 03:24:13,124 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:13,124 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 03:24:13,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:24:13,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:13,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash 973578143, now seen corresponding path program 1 times [2023-04-03 03:24:13,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:13,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526583575] [2023-04-03 03:24:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:13,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:13,225 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 03:24:13,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:13,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526583575] [2023-04-03 03:24:13,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526583575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:13,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:13,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:24:13,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679899141] [2023-04-03 03:24:13,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:13,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:24:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:13,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:24:13,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:24:13,227 INFO L87 Difference]: Start difference. First operand 316 states and 457 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 03:24:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:13,277 INFO L93 Difference]: Finished difference Result 771 states and 1146 transitions. [2023-04-03 03:24:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:24:13,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 03:24:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:13,280 INFO L225 Difference]: With dead ends: 771 [2023-04-03 03:24:13,280 INFO L226 Difference]: Without dead ends: 493 [2023-04-03 03:24:13,281 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 03:24:13,289 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 91 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 236 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 03:24:13,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 236 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-04-03 03:24:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 491. [2023-04-03 03:24:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 487 states have (on average 1.4784394250513346) internal successors, (720), 487 states have internal predecessors, (720), 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 03:24:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 723 transitions. [2023-04-03 03:24:13,321 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 723 transitions. Word has length 53 [2023-04-03 03:24:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:13,321 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 723 transitions. [2023-04-03 03:24:13,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 03:24:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 723 transitions. [2023-04-03 03:24:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 03:24:13,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:13,323 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] [2023-04-03 03:24:13,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:24:13,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:13,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1580093760, now seen corresponding path program 1 times [2023-04-03 03:24:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:13,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277590133] [2023-04-03 03:24:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:13,399 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 03:24:13,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:13,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277590133] [2023-04-03 03:24:13,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277590133] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:13,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:13,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:24:13,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768949239] [2023-04-03 03:24:13,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:13,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:24:13,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:13,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:24:13,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:24:13,402 INFO L87 Difference]: Start difference. First operand 491 states and 723 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 03:24:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:13,489 INFO L93 Difference]: Finished difference Result 1239 states and 1838 transitions. [2023-04-03 03:24:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:24:13,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 55 [2023-04-03 03:24:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:13,499 INFO L225 Difference]: With dead ends: 1239 [2023-04-03 03:24:13,499 INFO L226 Difference]: Without dead ends: 802 [2023-04-03 03:24:13,500 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 03:24:13,500 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 86 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 245 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 03:24:13,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 245 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2023-04-03 03:24:13,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 800. [2023-04-03 03:24:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 796 states have (on average 1.4623115577889447) internal successors, (1164), 796 states have internal predecessors, (1164), 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 03:24:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1167 transitions. [2023-04-03 03:24:13,618 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1167 transitions. Word has length 55 [2023-04-03 03:24:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:13,618 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1167 transitions. [2023-04-03 03:24:13,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 03:24:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1167 transitions. [2023-04-03 03:24:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 03:24:13,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:13,619 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] [2023-04-03 03:24:13,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:24:13,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:13,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash 888083464, now seen corresponding path program 1 times [2023-04-03 03:24:13,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:13,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681621445] [2023-04-03 03:24:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:13,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:13,699 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 03:24:13,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:13,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681621445] [2023-04-03 03:24:13,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681621445] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:13,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:13,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:24:13,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197761878] [2023-04-03 03:24:13,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:13,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:24:13,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:24:13,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:24:13,702 INFO L87 Difference]: Start difference. First operand 800 states and 1167 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 03:24:13,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:13,855 INFO L93 Difference]: Finished difference Result 1999 states and 2957 transitions. [2023-04-03 03:24:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:24:13,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 57 [2023-04-03 03:24:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:13,862 INFO L225 Difference]: With dead ends: 1999 [2023-04-03 03:24:13,862 INFO L226 Difference]: Without dead ends: 1253 [2023-04-03 03:24:13,864 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 03:24:13,865 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 85 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 238 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 03:24:13,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 238 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2023-04-03 03:24:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1251. [2023-04-03 03:24:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1247 states have (on average 1.474739374498797) internal successors, (1839), 1247 states have internal predecessors, (1839), 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 03:24:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1842 transitions. [2023-04-03 03:24:13,955 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1842 transitions. Word has length 57 [2023-04-03 03:24:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:13,955 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1842 transitions. [2023-04-03 03:24:13,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 03:24:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1842 transitions. [2023-04-03 03:24:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 03:24:13,955 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:13,956 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] [2023-04-03 03:24:13,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:24:13,956 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:13,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:13,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2038268759, now seen corresponding path program 1 times [2023-04-03 03:24:13,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:13,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369533077] [2023-04-03 03:24:13,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:13,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:24:14,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:14,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369533077] [2023-04-03 03:24:14,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369533077] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:14,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:14,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:24:14,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856196016] [2023-04-03 03:24:14,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:14,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:24:14,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:14,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:24:14,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:24:14,075 INFO L87 Difference]: Start difference. First operand 1251 states and 1842 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 03:24:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:14,439 INFO L93 Difference]: Finished difference Result 3948 states and 5866 transitions. [2023-04-03 03:24:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 03:24:14,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 59 [2023-04-03 03:24:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:14,450 INFO L225 Difference]: With dead ends: 3948 [2023-04-03 03:24:14,450 INFO L226 Difference]: Without dead ends: 2749 [2023-04-03 03:24:14,452 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 03:24:14,453 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 525 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 960 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 03:24:14,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 960 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:24:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2023-04-03 03:24:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 1951. [2023-04-03 03:24:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1947 states have (on average 1.4817668207498715) internal successors, (2885), 1947 states have internal predecessors, (2885), 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 03:24:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2888 transitions. [2023-04-03 03:24:14,596 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2888 transitions. Word has length 59 [2023-04-03 03:24:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:14,597 INFO L495 AbstractCegarLoop]: Abstraction has 1951 states and 2888 transitions. [2023-04-03 03:24:14,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 03:24:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2888 transitions. [2023-04-03 03:24:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 03:24:14,598 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:14,598 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] [2023-04-03 03:24:14,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:24:14,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:14,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:14,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1176567476, now seen corresponding path program 1 times [2023-04-03 03:24:14,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:14,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439492995] [2023-04-03 03:24:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:14,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:14,726 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 03:24:14,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:14,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439492995] [2023-04-03 03:24:14,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439492995] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:14,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:14,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 03:24:14,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153160265] [2023-04-03 03:24:14,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:14,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:24:14,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:14,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:24:14,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 03:24:14,731 INFO L87 Difference]: Start difference. First operand 1951 states and 2888 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 03:24:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:14,997 INFO L93 Difference]: Finished difference Result 4590 states and 6828 transitions. [2023-04-03 03:24:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:24:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 60 [2023-04-03 03:24:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:15,006 INFO L225 Difference]: With dead ends: 4590 [2023-04-03 03:24:15,007 INFO L226 Difference]: Without dead ends: 2709 [2023-04-03 03:24:15,012 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 03:24:15,013 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 174 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:24:15,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 347 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2023-04-03 03:24:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 2704. [2023-04-03 03:24:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 2700 states have (on average 1.484074074074074) internal successors, (4007), 2700 states have internal predecessors, (4007), 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 03:24:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 4010 transitions. [2023-04-03 03:24:15,272 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 4010 transitions. Word has length 60 [2023-04-03 03:24:15,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:15,272 INFO L495 AbstractCegarLoop]: Abstraction has 2704 states and 4010 transitions. [2023-04-03 03:24:15,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 03:24:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 4010 transitions. [2023-04-03 03:24:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-03 03:24:15,273 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:15,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:24:15,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:24:15,273 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:15,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash 286675144, now seen corresponding path program 1 times [2023-04-03 03:24:15,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:15,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792289912] [2023-04-03 03:24:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:15,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:15,531 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 03:24:15,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:15,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792289912] [2023-04-03 03:24:15,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792289912] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:15,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:15,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:24:15,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265760103] [2023-04-03 03:24:15,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:15,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:24:15,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:24:15,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:24:15,533 INFO L87 Difference]: Start difference. First operand 2704 states and 4010 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:24:15,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:15,989 INFO L93 Difference]: Finished difference Result 4535 states and 6664 transitions. [2023-04-03 03:24:15,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 03:24:15,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 68 [2023-04-03 03:24:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:16,003 INFO L225 Difference]: With dead ends: 4535 [2023-04-03 03:24:16,003 INFO L226 Difference]: Without dead ends: 4533 [2023-04-03 03:24:16,005 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 03:24:16,006 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 176 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 686 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 03:24:16,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 686 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4533 states. [2023-04-03 03:24:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4533 to 2756. [2023-04-03 03:24:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2752 states have (on average 1.4647529069767442) internal successors, (4031), 2752 states have internal predecessors, (4031), 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 03:24:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4034 transitions. [2023-04-03 03:24:16,256 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4034 transitions. Word has length 68 [2023-04-03 03:24:16,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:16,256 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4034 transitions. [2023-04-03 03:24:16,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:24:16,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4034 transitions. [2023-04-03 03:24:16,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 03:24:16,257 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:16,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:24:16,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:24:16,257 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:16,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:16,257 INFO L85 PathProgramCache]: Analyzing trace with hash -451444386, now seen corresponding path program 1 times [2023-04-03 03:24:16,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:16,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659942902] [2023-04-03 03:24:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:16,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:24:17,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:17,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659942902] [2023-04-03 03:24:17,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659942902] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:24:17,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587725307] [2023-04-03 03:24:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:17,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:24:17,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:24:17,269 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 03:24:17,270 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 03:24:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:17,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 03:24:17,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:24:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 03:24:17,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:24:17,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587725307] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:17,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:24:17,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2023-04-03 03:24:17,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350840856] [2023-04-03 03:24:17,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:17,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:24:17,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:17,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:24:17,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-04-03 03:24:17,752 INFO L87 Difference]: Start difference. First operand 2756 states and 4034 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 03:24:18,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:18,547 INFO L93 Difference]: Finished difference Result 7930 states and 11610 transitions. [2023-04-03 03:24:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:24:18,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 03:24:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:18,562 INFO L225 Difference]: With dead ends: 7930 [2023-04-03 03:24:18,562 INFO L226 Difference]: Without dead ends: 5241 [2023-04-03 03:24:18,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-04-03 03:24:18,607 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 306 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:24:18,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 331 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5241 states. [2023-04-03 03:24:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5241 to 5239. [2023-04-03 03:24:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5239 states, 5235 states have (on average 1.4542502387774594) internal successors, (7613), 5235 states have internal predecessors, (7613), 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 03:24:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5239 states to 5239 states and 7616 transitions. [2023-04-03 03:24:19,331 INFO L78 Accepts]: Start accepts. Automaton has 5239 states and 7616 transitions. Word has length 78 [2023-04-03 03:24:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:19,331 INFO L495 AbstractCegarLoop]: Abstraction has 5239 states and 7616 transitions. [2023-04-03 03:24:19,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 03:24:19,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5239 states and 7616 transitions. [2023-04-03 03:24:19,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-03 03:24:19,332 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:19,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:24:19,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 03:24:19,539 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 03:24:19,540 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:19,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:19,540 INFO L85 PathProgramCache]: Analyzing trace with hash 470585833, now seen corresponding path program 1 times [2023-04-03 03:24:19,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:19,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388188814] [2023-04-03 03:24:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:19,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 03:24:19,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388188814] [2023-04-03 03:24:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388188814] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:19,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:19,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:24:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020065474] [2023-04-03 03:24:19,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:19,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:24:19,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:24:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:24:19,599 INFO L87 Difference]: Start difference. First operand 5239 states and 7616 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 03:24:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:20,327 INFO L93 Difference]: Finished difference Result 12169 states and 17760 transitions. [2023-04-03 03:24:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:24:20,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 79 [2023-04-03 03:24:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:20,348 INFO L225 Difference]: With dead ends: 12169 [2023-04-03 03:24:20,348 INFO L226 Difference]: Without dead ends: 6992 [2023-04-03 03:24:20,356 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 03:24:20,356 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 86 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:24:20,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 250 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6992 states. [2023-04-03 03:24:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6992 to 6990. [2023-04-03 03:24:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6986 states have (on average 1.4441740624105353) internal successors, (10089), 6986 states have internal predecessors, (10089), 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 03:24:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 10092 transitions. [2023-04-03 03:24:21,224 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 10092 transitions. Word has length 79 [2023-04-03 03:24:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:21,225 INFO L495 AbstractCegarLoop]: Abstraction has 6990 states and 10092 transitions. [2023-04-03 03:24:21,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 03:24:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 10092 transitions. [2023-04-03 03:24:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-03 03:24:21,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:21,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:24:21,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:24:21,226 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:21,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:21,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1778228531, now seen corresponding path program 1 times [2023-04-03 03:24:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:21,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894580454] [2023-04-03 03:24:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:24:22,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:22,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894580454] [2023-04-03 03:24:22,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894580454] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:24:22,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52444076] [2023-04-03 03:24:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:22,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:24:22,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:24:22,048 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 03:24:22,077 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 03:24:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:22,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 03:24:22,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:24:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 03:24:22,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:24:22,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52444076] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:22,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:24:22,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 03:24:22,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882911434] [2023-04-03 03:24:22,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:22,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:24:22,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:24:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-03 03:24:22,549 INFO L87 Difference]: Start difference. First operand 6990 states and 10092 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 03:24:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:24,233 INFO L93 Difference]: Finished difference Result 20399 states and 29408 transitions. [2023-04-03 03:24:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:24:24,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 82 [2023-04-03 03:24:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:24,263 INFO L225 Difference]: With dead ends: 20399 [2023-04-03 03:24:24,263 INFO L226 Difference]: Without dead ends: 13460 [2023-04-03 03:24:24,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-03 03:24:24,277 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 304 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 344 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 03:24:24,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 344 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13460 states. [2023-04-03 03:24:26,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13460 to 13458. [2023-04-03 03:24:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13458 states, 13454 states have (on average 1.4327337594767355) internal successors, (19276), 13454 states have internal predecessors, (19276), 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 03:24:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13458 states to 13458 states and 19279 transitions. [2023-04-03 03:24:26,172 INFO L78 Accepts]: Start accepts. Automaton has 13458 states and 19279 transitions. Word has length 82 [2023-04-03 03:24:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:26,173 INFO L495 AbstractCegarLoop]: Abstraction has 13458 states and 19279 transitions. [2023-04-03 03:24:26,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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 03:24:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 13458 states and 19279 transitions. [2023-04-03 03:24:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 03:24:26,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:26,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:24:26,181 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 03:24:26,381 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,SelfDestructingSolverStorable11 [2023-04-03 03:24:26,382 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:26,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:26,382 INFO L85 PathProgramCache]: Analyzing trace with hash -648476326, now seen corresponding path program 1 times [2023-04-03 03:24:26,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:26,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504057535] [2023-04-03 03:24:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:26,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 03:24:26,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:26,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504057535] [2023-04-03 03:24:26,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504057535] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:26,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:26,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:24:26,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436420405] [2023-04-03 03:24:26,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:26,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:24:26,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:24:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:24:26,441 INFO L87 Difference]: Start difference. First operand 13458 states and 19279 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 03:24:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:28,577 INFO L93 Difference]: Finished difference Result 30260 states and 43413 transitions. [2023-04-03 03:24:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:24:28,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 83 [2023-04-03 03:24:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:28,620 INFO L225 Difference]: With dead ends: 30260 [2023-04-03 03:24:28,620 INFO L226 Difference]: Without dead ends: 16848 [2023-04-03 03:24:28,641 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 03:24:28,642 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 87 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 246 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 03:24:28,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 246 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16848 states. [2023-04-03 03:24:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16848 to 16846. [2023-04-03 03:24:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16846 states, 16842 states have (on average 1.4188338677116732) internal successors, (23896), 16842 states have internal predecessors, (23896), 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 03:24:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16846 states to 16846 states and 23899 transitions. [2023-04-03 03:24:30,958 INFO L78 Accepts]: Start accepts. Automaton has 16846 states and 23899 transitions. Word has length 83 [2023-04-03 03:24:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:30,958 INFO L495 AbstractCegarLoop]: Abstraction has 16846 states and 23899 transitions. [2023-04-03 03:24:30,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 03:24:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 16846 states and 23899 transitions. [2023-04-03 03:24:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 03:24:30,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:30,960 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:24:30,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 03:24:30,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:30,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1401709011, now seen corresponding path program 1 times [2023-04-03 03:24:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:30,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803975036] [2023-04-03 03:24:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:30,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 03:24:31,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:31,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803975036] [2023-04-03 03:24:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803975036] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:31,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:31,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:24:31,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785030645] [2023-04-03 03:24:31,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:31,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:24:31,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:31,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:24:31,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:24:31,048 INFO L87 Difference]: Start difference. First operand 16846 states and 23899 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 03:24:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:33,377 INFO L93 Difference]: Finished difference Result 33648 states and 47751 transitions. [2023-04-03 03:24:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:24:33,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 86 [2023-04-03 03:24:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:33,410 INFO L225 Difference]: With dead ends: 33648 [2023-04-03 03:24:33,410 INFO L226 Difference]: Without dead ends: 16846 [2023-04-03 03:24:33,435 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 03:24:33,436 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 329 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 122 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 03:24:33,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 122 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16846 states. [2023-04-03 03:24:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16846 to 16846. [2023-04-03 03:24:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16846 states, 16842 states have (on average 1.4019712623203895) internal successors, (23612), 16842 states have internal predecessors, (23612), 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 03:24:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16846 states to 16846 states and 23615 transitions. [2023-04-03 03:24:36,049 INFO L78 Accepts]: Start accepts. Automaton has 16846 states and 23615 transitions. Word has length 86 [2023-04-03 03:24:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:36,049 INFO L495 AbstractCegarLoop]: Abstraction has 16846 states and 23615 transitions. [2023-04-03 03:24:36,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 03:24:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 16846 states and 23615 transitions. [2023-04-03 03:24:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 03:24:36,051 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:36,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:24:36,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 03:24:36,051 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:36,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1742919224, now seen corresponding path program 1 times [2023-04-03 03:24:36,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:36,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503825330] [2023-04-03 03:24:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:36,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:24:36,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:36,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503825330] [2023-04-03 03:24:36,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503825330] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:24:36,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166644211] [2023-04-03 03:24:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:36,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:24:36,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:24:36,741 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 03:24:36,753 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 03:24:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:36,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 03:24:36,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:24:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 03:24:37,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:24:37,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166644211] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:37,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:24:37,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 03:24:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832140487] [2023-04-03 03:24:37,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:37,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:24:37,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:37,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:24:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-03 03:24:37,308 INFO L87 Difference]: Start difference. First operand 16846 states and 23615 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 03:24:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:43,175 INFO L93 Difference]: Finished difference Result 49082 states and 68601 transitions. [2023-04-03 03:24:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:24:43,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 86 [2023-04-03 03:24:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:43,232 INFO L225 Difference]: With dead ends: 49082 [2023-04-03 03:24:43,232 INFO L226 Difference]: Without dead ends: 32334 [2023-04-03 03:24:43,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-03 03:24:43,255 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 275 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 339 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 03:24:43,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 339 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32334 states. [2023-04-03 03:24:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32334 to 32332. [2023-04-03 03:24:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32332 states, 32328 states have (on average 1.3871566443949517) internal successors, (44844), 32328 states have internal predecessors, (44844), 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 03:24:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32332 states to 32332 states and 44847 transitions. [2023-04-03 03:24:49,471 INFO L78 Accepts]: Start accepts. Automaton has 32332 states and 44847 transitions. Word has length 86 [2023-04-03 03:24:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:24:49,471 INFO L495 AbstractCegarLoop]: Abstraction has 32332 states and 44847 transitions. [2023-04-03 03:24:49,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 03:24:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 32332 states and 44847 transitions. [2023-04-03 03:24:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 03:24:49,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:24:49,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:24:49,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-03 03:24:49,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:24:49,680 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:24:49,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:24:49,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1237276395, now seen corresponding path program 1 times [2023-04-03 03:24:49,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:24:49,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618139056] [2023-04-03 03:24:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:24:49,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:24:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:24:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 03:24:49,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:24:49,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618139056] [2023-04-03 03:24:49,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618139056] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:24:49,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:24:49,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:24:49,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285098720] [2023-04-03 03:24:49,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:24:49,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:24:49,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:24:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:24:49,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:24:49,743 INFO L87 Difference]: Start difference. First operand 32332 states and 44847 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 03:24:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:24:57,631 INFO L93 Difference]: Finished difference Result 75036 states and 104321 transitions. [2023-04-03 03:24:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:24:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 87 [2023-04-03 03:24:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:24:57,723 INFO L225 Difference]: With dead ends: 75036 [2023-04-03 03:24:57,723 INFO L226 Difference]: Without dead ends: 42802 [2023-04-03 03:24:57,761 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 03:24:57,761 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 70 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:24:57,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 251 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:24:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42802 states. [2023-04-03 03:25:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42802 to 42800. [2023-04-03 03:25:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42800 states, 42796 states have (on average 1.3746144499485933) internal successors, (58828), 42796 states have internal predecessors, (58828), 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 03:25:05,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42800 states to 42800 states and 58831 transitions. [2023-04-03 03:25:05,990 INFO L78 Accepts]: Start accepts. Automaton has 42800 states and 58831 transitions. Word has length 87 [2023-04-03 03:25:05,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:05,991 INFO L495 AbstractCegarLoop]: Abstraction has 42800 states and 58831 transitions. [2023-04-03 03:25:05,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 03:25:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 42800 states and 58831 transitions. [2023-04-03 03:25:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 03:25:05,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:05,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:25:05,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 03:25:05,993 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:05,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:05,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1036289982, now seen corresponding path program 1 times [2023-04-03 03:25:05,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:05,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713044446] [2023-04-03 03:25:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:05,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 03:25:06,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:06,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713044446] [2023-04-03 03:25:06,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713044446] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:06,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:06,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:25:06,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839731944] [2023-04-03 03:25:06,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:06,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:25:06,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:06,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:25:06,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:25:06,092 INFO L87 Difference]: Start difference. First operand 42800 states and 58831 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 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 03:25:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:14,866 INFO L93 Difference]: Finished difference Result 85502 states and 117548 transitions. [2023-04-03 03:25:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:25:14,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 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 90 [2023-04-03 03:25:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:14,936 INFO L225 Difference]: With dead ends: 85502 [2023-04-03 03:25:14,937 INFO L226 Difference]: Without dead ends: 42800 [2023-04-03 03:25:14,976 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 03:25:14,978 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 299 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:14,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 126 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:25:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42800 states. [2023-04-03 03:25:23,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42800 to 42800. [2023-04-03 03:25:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42800 states, 42796 states have (on average 1.356949247593233) internal successors, (58072), 42796 states have internal predecessors, (58072), 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 03:25:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42800 states to 42800 states and 58075 transitions. [2023-04-03 03:25:23,542 INFO L78 Accepts]: Start accepts. Automaton has 42800 states and 58075 transitions. Word has length 90 [2023-04-03 03:25:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:23,542 INFO L495 AbstractCegarLoop]: Abstraction has 42800 states and 58075 transitions. [2023-04-03 03:25:23,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 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 03:25:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 42800 states and 58075 transitions. [2023-04-03 03:25:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 03:25:23,547 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:23,548 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:25:23,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 03:25:23,548 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:23,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1787979299, now seen corresponding path program 1 times [2023-04-03 03:25:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:23,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810658920] [2023-04-03 03:25:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:25:24,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:24,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810658920] [2023-04-03 03:25:24,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810658920] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:25:24,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206470258] [2023-04-03 03:25:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:24,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:25:24,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:25:24,133 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 03:25:24,171 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 03:25:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:24,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-03 03:25:24,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:25:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 03:25:24,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:25:24,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206470258] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:24,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:25:24,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-04-03 03:25:24,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770093618] [2023-04-03 03:25:24,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:24,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:25:24,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:25:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-04-03 03:25:24,773 INFO L87 Difference]: Start difference. First operand 42800 states and 58075 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 03:25:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:31,303 INFO L93 Difference]: Finished difference Result 75567 states and 102356 transitions. [2023-04-03 03:25:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:25:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 90 [2023-04-03 03:25:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:31,353 INFO L225 Difference]: With dead ends: 75567 [2023-04-03 03:25:31,357 INFO L226 Difference]: Without dead ends: 32862 [2023-04-03 03:25:31,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-04-03 03:25:31,394 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 409 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:31,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 254 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:25:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32862 states. [2023-04-03 03:25:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32862 to 32859. [2023-04-03 03:25:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32859 states, 32855 states have (on average 1.350966367371785) internal successors, (44386), 32855 states have internal predecessors, (44386), 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 03:25:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32859 states to 32859 states and 44389 transitions. [2023-04-03 03:25:37,808 INFO L78 Accepts]: Start accepts. Automaton has 32859 states and 44389 transitions. Word has length 90 [2023-04-03 03:25:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:37,809 INFO L495 AbstractCegarLoop]: Abstraction has 32859 states and 44389 transitions. [2023-04-03 03:25:37,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 03:25:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 32859 states and 44389 transitions. [2023-04-03 03:25:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 03:25:37,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:37,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:25:37,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 03:25:38,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-03 03:25:38,018 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:38,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash 533171253, now seen corresponding path program 1 times [2023-04-03 03:25:38,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:38,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084915198] [2023-04-03 03:25:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:38,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 03:25:38,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:38,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084915198] [2023-04-03 03:25:38,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084915198] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:38,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:38,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:25:38,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502673921] [2023-04-03 03:25:38,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:38,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:25:38,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:38,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:25:38,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:25:38,107 INFO L87 Difference]: Start difference. First operand 32859 states and 44389 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 03:25:44,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:44,603 INFO L93 Difference]: Finished difference Result 65649 states and 88699 transitions. [2023-04-03 03:25:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:25:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 90 [2023-04-03 03:25:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:44,662 INFO L225 Difference]: With dead ends: 65649 [2023-04-03 03:25:44,663 INFO L226 Difference]: Without dead ends: 32859 [2023-04-03 03:25:44,693 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 03:25:44,694 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 304 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:44,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 124 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:25:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32859 states. [2023-04-03 03:25:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32859 to 32859. [2023-04-03 03:25:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32859 states, 32855 states have (on average 1.3292345152944758) internal successors, (43672), 32855 states have internal predecessors, (43672), 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 03:25:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32859 states to 32859 states and 43675 transitions. [2023-04-03 03:25:51,879 INFO L78 Accepts]: Start accepts. Automaton has 32859 states and 43675 transitions. Word has length 90 [2023-04-03 03:25:51,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:51,879 INFO L495 AbstractCegarLoop]: Abstraction has 32859 states and 43675 transitions. [2023-04-03 03:25:51,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 03:25:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 32859 states and 43675 transitions. [2023-04-03 03:25:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 03:25:51,881 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:51,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:25:51,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 03:25:51,881 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:51,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:51,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1856570342, now seen corresponding path program 1 times [2023-04-03 03:25:51,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:51,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411985848] [2023-04-03 03:25:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:51,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:25:52,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:52,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411985848] [2023-04-03 03:25:52,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411985848] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:25:52,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953947957] [2023-04-03 03:25:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:52,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:25:52,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:25:52,597 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 03:25:52,600 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 03:25:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:52,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-03 03:25:52,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:25:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:25:53,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 03:25:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:58,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953947957] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 03:25:58,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116694495] [2023-04-03 03:25:58,642 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-03 03:25:58,642 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 03:25:58,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 03:25:58,650 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 03:25:58,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 03:25:59,390 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 202 for LOIs [2023-04-03 03:26:00,291 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12