/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/systemc/toy2.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:18:03,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:18:03,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:18:03,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:18:03,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:18:03,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:18:03,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:18:03,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:18:03,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:18:03,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:18:03,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:18:03,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:18:03,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:18:03,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:18:03,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:18:03,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:18:03,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:18:03,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:18:03,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:18:03,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:18:03,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:18:03,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:18:03,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:18:03,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:18:03,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:18:03,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:18:03,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:18:03,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:18:03,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:18:03,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:18:03,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:18:03,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:18:03,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:18:03,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:18:03,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:18:03,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:18:03,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:18:03,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:18:03,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:18:03,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:18:03,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:18:03,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:18:03,783 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:18:03,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:18:03,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:18:03,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:18:03,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:18:03,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:18:03,786 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:18:03,786 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:18:03,786 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:18:03,786 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:18:03,787 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:18:03,787 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:18:03,787 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:18:03,787 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:18:03,787 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:18:03,788 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:18:03,788 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:18:03,788 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:18:03,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:18:03,788 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:18:03,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:18:03,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:18:03,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:18:03,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:18:03,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:18:03,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:18:03,789 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:18:03,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:18:03,789 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:18:03,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:18:03,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:18:03,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:18:03,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:18:03,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:18:03,790 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:18:03,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:18:03,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:18:03,791 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:18:03,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:18:03,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:18:03,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:18:03,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:18:04,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:18:04,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:18:04,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:18:04,033 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:18:04,033 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:18:04,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/toy2.cil.c [2023-04-01 12:18:05,202 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:18:05,440 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:18:05,446 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/toy2.cil.c [2023-04-01 12:18:05,457 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b1dacd2a/efe894b607b64c64b3bad62306b95d77/FLAG736abb9af [2023-04-01 12:18:05,469 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b1dacd2a/efe894b607b64c64b3bad62306b95d77 [2023-04-01 12:18:05,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:18:05,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:18:05,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:18:05,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:18:05,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:18:05,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a3d0e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05, skipping insertion in model container [2023-04-01 12:18:05,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:18:05,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:18:05,622 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/systemc/toy2.cil.c[698,711] [2023-04-01 12:18:05,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:18:05,693 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:18:05,702 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/systemc/toy2.cil.c[698,711] [2023-04-01 12:18:05,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:18:05,744 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:18:05,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05 WrapperNode [2023-04-01 12:18:05,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:18:05,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:18:05,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:18:05,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:18:05,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,782 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:18:05,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:18:05,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:18:05,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:18:05,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05" (1/1) ... [2023-04-01 12:18:05,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:18:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:18:05,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:18:05,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:18:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:18:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:18:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:18:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 12:18:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure write_loop [2023-04-01 12:18:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure compute1 [2023-04-01 12:18:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure compute2 [2023-04-01 12:18:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure write_back [2023-04-01 12:18:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure read [2023-04-01 12:18:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 12:18:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 12:18:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:18:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:18:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:18:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:18:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:18:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 12:18:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 12:18:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure write_loop [2023-04-01 12:18:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure compute1 [2023-04-01 12:18:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure compute2 [2023-04-01 12:18:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure write_back [2023-04-01 12:18:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:18:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:18:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:18:05,931 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:18:05,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:18:06,328 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:18:06,661 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:18:06,662 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-01 12:18:06,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:18:06 BoogieIcfgContainer [2023-04-01 12:18:06,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:18:06,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:18:06,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:18:06,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:18:06,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:18:05" (1/3) ... [2023-04-01 12:18:06,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6412d336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:18:06, skipping insertion in model container [2023-04-01 12:18:06,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:18:05" (2/3) ... [2023-04-01 12:18:06,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6412d336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:18:06, skipping insertion in model container [2023-04-01 12:18:06,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:18:06" (3/3) ... [2023-04-01 12:18:06,674 INFO L112 eAbstractionObserver]: Analyzing ICFG toy2.cil.c [2023-04-01 12:18:06,696 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:18:06,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:18:06,751 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:18:06,757 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;@20887ca8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:18:06,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:18:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 63 states have internal predecessors, (89), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 12:18:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 12:18:06,767 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:06,768 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] [2023-04-01 12:18:06,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:06,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:06,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1699114692, now seen corresponding path program 1 times [2023-04-01 12:18:06,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:06,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145597468] [2023-04-01 12:18:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:06,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:18:07,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:07,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145597468] [2023-04-01 12:18:07,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145597468] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:07,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:18:07,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:18:07,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710283362] [2023-04-01 12:18:07,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:07,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:18:07,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:18:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:18:07,289 INFO L87 Difference]: Start difference. First operand has 78 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 63 states have internal predecessors, (89), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:18:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:07,463 INFO L93 Difference]: Finished difference Result 201 states and 293 transitions. [2023-04-01 12:18:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:18:07,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 12:18:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:07,473 INFO L225 Difference]: With dead ends: 201 [2023-04-01 12:18:07,473 INFO L226 Difference]: Without dead ends: 119 [2023-04-01 12:18:07,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:18:07,484 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 78 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:07,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 153 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:18:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-04-01 12:18:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2023-04-01 12:18:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 98 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-01 12:18:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 165 transitions. [2023-04-01 12:18:07,543 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 165 transitions. Word has length 24 [2023-04-01 12:18:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:07,544 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 165 transitions. [2023-04-01 12:18:07,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:18:07,544 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 165 transitions. [2023-04-01 12:18:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 12:18:07,546 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:07,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:07,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:18:07,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:07,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash -137843174, now seen corresponding path program 1 times [2023-04-01 12:18:07,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:07,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049175084] [2023-04-01 12:18:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:07,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:18:07,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:07,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049175084] [2023-04-01 12:18:07,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049175084] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:07,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:18:07,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:18:07,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438298942] [2023-04-01 12:18:07,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:07,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:18:07,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:18:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:18:07,962 INFO L87 Difference]: Start difference. First operand 118 states and 165 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:18:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:08,429 INFO L93 Difference]: Finished difference Result 448 states and 684 transitions. [2023-04-01 12:18:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:18:08,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2023-04-01 12:18:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:08,444 INFO L225 Difference]: With dead ends: 448 [2023-04-01 12:18:08,444 INFO L226 Difference]: Without dead ends: 340 [2023-04-01 12:18:08,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:18:08,454 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 304 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:08,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 521 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:18:08,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-04-01 12:18:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 230. [2023-04-01 12:18:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 173 states have (on average 1.5664739884393064) internal successors, (271), 200 states have internal predecessors, (271), 34 states have call successors, (34), 26 states have call predecessors, (34), 22 states have return successors, (38), 26 states have call predecessors, (38), 31 states have call successors, (38) [2023-04-01 12:18:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 343 transitions. [2023-04-01 12:18:08,495 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 343 transitions. Word has length 38 [2023-04-01 12:18:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:08,495 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 343 transitions. [2023-04-01 12:18:08,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:18:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 343 transitions. [2023-04-01 12:18:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 12:18:08,497 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:08,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:08,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:18:08,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:08,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:08,498 INFO L85 PathProgramCache]: Analyzing trace with hash 883066742, now seen corresponding path program 1 times [2023-04-01 12:18:08,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:08,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269324923] [2023-04-01 12:18:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:08,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:18:08,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:08,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269324923] [2023-04-01 12:18:08,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269324923] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:08,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:18:08,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:18:08,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875232617] [2023-04-01 12:18:08,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:08,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:18:08,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:08,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:18:08,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:18:08,778 INFO L87 Difference]: Start difference. First operand 230 states and 343 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:18:09,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:09,149 INFO L93 Difference]: Finished difference Result 953 states and 1533 transitions. [2023-04-01 12:18:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:18:09,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-04-01 12:18:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:09,160 INFO L225 Difference]: With dead ends: 953 [2023-04-01 12:18:09,161 INFO L226 Difference]: Without dead ends: 733 [2023-04-01 12:18:09,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:18:09,168 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 382 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:09,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 381 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:18:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2023-04-01 12:18:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 623. [2023-04-01 12:18:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 478 states have (on average 1.5899581589958158) internal successors, (760), 562 states have internal predecessors, (760), 91 states have call successors, (91), 57 states have call predecessors, (91), 53 states have return successors, (116), 72 states have call predecessors, (116), 88 states have call successors, (116) [2023-04-01 12:18:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 967 transitions. [2023-04-01 12:18:09,303 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 967 transitions. Word has length 39 [2023-04-01 12:18:09,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:09,303 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 967 transitions. [2023-04-01 12:18:09,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:18:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 967 transitions. [2023-04-01 12:18:09,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 12:18:09,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:09,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:09,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:18:09,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:09,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:09,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1351299419, now seen corresponding path program 1 times [2023-04-01 12:18:09,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:09,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089083689] [2023-04-01 12:18:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:09,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:18:09,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:09,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089083689] [2023-04-01 12:18:09,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089083689] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:09,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:18:09,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:18:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797142022] [2023-04-01 12:18:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:09,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:18:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:09,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:18:09,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:18:09,497 INFO L87 Difference]: Start difference. First operand 623 states and 967 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:18:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:09,761 INFO L93 Difference]: Finished difference Result 2089 states and 3266 transitions. [2023-04-01 12:18:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:18:09,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2023-04-01 12:18:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:09,770 INFO L225 Difference]: With dead ends: 2089 [2023-04-01 12:18:09,770 INFO L226 Difference]: Without dead ends: 1479 [2023-04-01 12:18:09,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:18:09,776 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 276 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:09,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 295 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:18:09,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2023-04-01 12:18:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1455. [2023-04-01 12:18:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1152 states have (on average 1.5503472222222223) internal successors, (1786), 1324 states have internal predecessors, (1786), 185 states have call successors, (185), 127 states have call predecessors, (185), 117 states have return successors, (233), 147 states have call predecessors, (233), 182 states have call successors, (233) [2023-04-01 12:18:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2204 transitions. [2023-04-01 12:18:09,926 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2204 transitions. Word has length 40 [2023-04-01 12:18:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:09,926 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 2204 transitions. [2023-04-01 12:18:09,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:18:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2204 transitions. [2023-04-01 12:18:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 12:18:09,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:09,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:09,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:18:09,929 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:09,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1005973557, now seen corresponding path program 1 times [2023-04-01 12:18:09,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:09,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124661108] [2023-04-01 12:18:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:09,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:18:09,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:09,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124661108] [2023-04-01 12:18:09,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124661108] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:09,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:18:09,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:18:09,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584689962] [2023-04-01 12:18:09,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:09,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:18:09,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:18:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:18:09,993 INFO L87 Difference]: Start difference. First operand 1455 states and 2204 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 12:18:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:10,150 INFO L93 Difference]: Finished difference Result 2770 states and 4288 transitions. [2023-04-01 12:18:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:18:10,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-04-01 12:18:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:10,161 INFO L225 Difference]: With dead ends: 2770 [2023-04-01 12:18:10,162 INFO L226 Difference]: Without dead ends: 1963 [2023-04-01 12:18:10,167 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 [2023-04-01 12:18:10,168 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 39 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:10,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 189 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:18:10,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2023-04-01 12:18:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1851. [2023-04-01 12:18:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1497 states have (on average 1.539746158984636) internal successors, (2305), 1699 states have internal predecessors, (2305), 215 states have call successors, (215), 148 states have call predecessors, (215), 138 states have return successors, (263), 177 states have call predecessors, (263), 212 states have call successors, (263) [2023-04-01 12:18:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 2783 transitions. [2023-04-01 12:18:10,307 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 2783 transitions. Word has length 41 [2023-04-01 12:18:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:10,308 INFO L495 AbstractCegarLoop]: Abstraction has 1851 states and 2783 transitions. [2023-04-01 12:18:10,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 12:18:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 2783 transitions. [2023-04-01 12:18:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:18:10,313 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:10,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:10,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:18:10,314 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:10,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash 293165693, now seen corresponding path program 1 times [2023-04-01 12:18:10,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:10,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770629684] [2023-04-01 12:18:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:10,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:18:10,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:10,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770629684] [2023-04-01 12:18:10,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770629684] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:10,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:18:10,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:18:10,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483615254] [2023-04-01 12:18:10,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:10,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:18:10,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:18:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:18:10,459 INFO L87 Difference]: Start difference. First operand 1851 states and 2783 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 12:18:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:10,746 INFO L93 Difference]: Finished difference Result 3661 states and 5589 transitions. [2023-04-01 12:18:10,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 12:18:10,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2023-04-01 12:18:10,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:10,759 INFO L225 Difference]: With dead ends: 3661 [2023-04-01 12:18:10,759 INFO L226 Difference]: Without dead ends: 2458 [2023-04-01 12:18:10,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:18:10,770 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 244 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:10,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 337 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:18:10,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2023-04-01 12:18:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2407. [2023-04-01 12:18:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 1940 states have (on average 1.5417525773195877) internal successors, (2991), 2214 states have internal predecessors, (2991), 284 states have call successors, (284), 188 states have call predecessors, (284), 182 states have return successors, (362), 237 states have call predecessors, (362), 281 states have call successors, (362) [2023-04-01 12:18:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3637 transitions. [2023-04-01 12:18:10,956 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3637 transitions. Word has length 48 [2023-04-01 12:18:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:10,957 INFO L495 AbstractCegarLoop]: Abstraction has 2407 states and 3637 transitions. [2023-04-01 12:18:10,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 12:18:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3637 transitions. [2023-04-01 12:18:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:18:10,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:10,960 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:10,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:18:10,960 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:10,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash -472428813, now seen corresponding path program 1 times [2023-04-01 12:18:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:10,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410488520] [2023-04-01 12:18:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:10,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:18:11,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:11,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410488520] [2023-04-01 12:18:11,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410488520] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:11,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:18:11,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:18:11,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925761007] [2023-04-01 12:18:11,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:11,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:18:11,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:11,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:18:11,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:18:11,013 INFO L87 Difference]: Start difference. First operand 2407 states and 3637 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 12:18:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:11,357 INFO L93 Difference]: Finished difference Result 5373 states and 8384 transitions. [2023-04-01 12:18:11,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:18:11,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2023-04-01 12:18:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:11,376 INFO L225 Difference]: With dead ends: 5373 [2023-04-01 12:18:11,377 INFO L226 Difference]: Without dead ends: 3614 [2023-04-01 12:18:11,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:18:11,399 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 148 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:11,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 228 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:18:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3614 states. [2023-04-01 12:18:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3614 to 3558. [2023-04-01 12:18:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 2881 states have (on average 1.498090940645609) internal successors, (4316), 3254 states have internal predecessors, (4316), 403 states have call successors, (403), 298 states have call predecessors, (403), 273 states have return successors, (506), 355 states have call predecessors, (506), 400 states have call successors, (506) [2023-04-01 12:18:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 5225 transitions. [2023-04-01 12:18:11,662 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 5225 transitions. Word has length 48 [2023-04-01 12:18:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:11,664 INFO L495 AbstractCegarLoop]: Abstraction has 3558 states and 5225 transitions. [2023-04-01 12:18:11,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 12:18:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 5225 transitions. [2023-04-01 12:18:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 12:18:11,679 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:11,679 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:11,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:18:11,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:11,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2014036615, now seen corresponding path program 1 times [2023-04-01 12:18:11,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:11,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110812817] [2023-04-01 12:18:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:11,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:18:11,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:11,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110812817] [2023-04-01 12:18:11,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110812817] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:18:11,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505359051] [2023-04-01 12:18:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:11,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:18:11,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:18:11,933 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) [2023-04-01 12:18:11,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:18:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:12,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 12:18:12,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:18:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:18:12,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:18:12,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505359051] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:12,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:18:12,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 12:18:12,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789420257] [2023-04-01 12:18:12,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:12,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:18:12,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:18:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:18:12,177 INFO L87 Difference]: Start difference. First operand 3558 states and 5225 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 12:18:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:12,552 INFO L93 Difference]: Finished difference Result 8232 states and 12228 transitions. [2023-04-01 12:18:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:18:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 75 [2023-04-01 12:18:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:12,588 INFO L225 Difference]: With dead ends: 8232 [2023-04-01 12:18:12,588 INFO L226 Difference]: Without dead ends: 4687 [2023-04-01 12:18:12,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:18:12,648 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 42 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:12,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 196 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:18:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2023-04-01 12:18:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 4419. [2023-04-01 12:18:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 3603 states have (on average 1.4776575076325285) internal successors, (5324), 4073 states have internal predecessors, (5324), 495 states have call successors, (495), 334 states have call predecessors, (495), 320 states have return successors, (603), 447 states have call predecessors, (603), 492 states have call successors, (603) [2023-04-01 12:18:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 6422 transitions. [2023-04-01 12:18:12,938 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 6422 transitions. Word has length 75 [2023-04-01 12:18:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:12,938 INFO L495 AbstractCegarLoop]: Abstraction has 4419 states and 6422 transitions. [2023-04-01 12:18:12,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 12:18:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 6422 transitions. [2023-04-01 12:18:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 12:18:12,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:12,962 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:12,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:18:13,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:18:13,170 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:13,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:13,170 INFO L85 PathProgramCache]: Analyzing trace with hash 119474169, now seen corresponding path program 1 times [2023-04-01 12:18:13,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:13,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815286737] [2023-04-01 12:18:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:13,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 12:18:13,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:13,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815286737] [2023-04-01 12:18:13,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815286737] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:13,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:18:13,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:18:13,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622152460] [2023-04-01 12:18:13,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:13,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:18:13,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:13,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:18:13,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:18:13,280 INFO L87 Difference]: Start difference. First operand 4419 states and 6422 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 12:18:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:13,667 INFO L93 Difference]: Finished difference Result 10225 states and 14988 transitions. [2023-04-01 12:18:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:18:13,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2023-04-01 12:18:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:13,701 INFO L225 Difference]: With dead ends: 10225 [2023-04-01 12:18:13,701 INFO L226 Difference]: Without dead ends: 5819 [2023-04-01 12:18:13,731 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 [2023-04-01 12:18:13,734 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 42 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:13,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 150 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:18:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5819 states. [2023-04-01 12:18:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5819 to 5377. [2023-04-01 12:18:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5377 states, 4330 states have (on average 1.422863741339492) internal successors, (6161), 4917 states have internal predecessors, (6161), 626 states have call successors, (626), 437 states have call predecessors, (626), 420 states have return successors, (730), 578 states have call predecessors, (730), 623 states have call successors, (730) [2023-04-01 12:18:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 7517 transitions. [2023-04-01 12:18:14,092 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 7517 transitions. Word has length 94 [2023-04-01 12:18:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:14,092 INFO L495 AbstractCegarLoop]: Abstraction has 5377 states and 7517 transitions. [2023-04-01 12:18:14,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 12:18:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 7517 transitions. [2023-04-01 12:18:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 12:18:14,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:14,119 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:14,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:18:14,120 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:14,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:14,120 INFO L85 PathProgramCache]: Analyzing trace with hash 144330815, now seen corresponding path program 1 times [2023-04-01 12:18:14,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:14,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799091395] [2023-04-01 12:18:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:14,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:18:14,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:14,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799091395] [2023-04-01 12:18:14,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799091395] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:14,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:18:14,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:18:14,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120192737] [2023-04-01 12:18:14,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:14,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:18:14,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:14,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:18:14,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:18:14,303 INFO L87 Difference]: Start difference. First operand 5377 states and 7517 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 12:18:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:14,750 INFO L93 Difference]: Finished difference Result 8666 states and 12125 transitions. [2023-04-01 12:18:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:18:14,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2023-04-01 12:18:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:14,795 INFO L225 Difference]: With dead ends: 8666 [2023-04-01 12:18:14,795 INFO L226 Difference]: Without dead ends: 5697 [2023-04-01 12:18:14,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:18:14,808 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 120 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:14,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 427 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:18:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2023-04-01 12:18:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5343. [2023-04-01 12:18:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5343 states, 4304 states have (on average 1.424953531598513) internal successors, (6133), 4887 states have internal predecessors, (6133), 622 states have call successors, (622), 433 states have call predecessors, (622), 416 states have return successors, (726), 566 states have call predecessors, (726), 619 states have call successors, (726) [2023-04-01 12:18:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 7481 transitions. [2023-04-01 12:18:15,191 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 7481 transitions. Word has length 89 [2023-04-01 12:18:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:15,192 INFO L495 AbstractCegarLoop]: Abstraction has 5343 states and 7481 transitions. [2023-04-01 12:18:15,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 12:18:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 7481 transitions. [2023-04-01 12:18:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 12:18:15,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:15,217 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:15,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:18:15,218 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:15,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:15,219 INFO L85 PathProgramCache]: Analyzing trace with hash -376768256, now seen corresponding path program 1 times [2023-04-01 12:18:15,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:15,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669894132] [2023-04-01 12:18:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:15,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:18:15,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:15,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669894132] [2023-04-01 12:18:15,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669894132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:18:15,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:18:15,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:18:15,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282653950] [2023-04-01 12:18:15,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:18:15,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:18:15,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:18:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:18:15,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:18:15,390 INFO L87 Difference]: Start difference. First operand 5343 states and 7481 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 12:18:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:18:15,918 INFO L93 Difference]: Finished difference Result 9645 states and 13414 transitions. [2023-04-01 12:18:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:18:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 90 [2023-04-01 12:18:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:18:15,949 INFO L225 Difference]: With dead ends: 9645 [2023-04-01 12:18:15,950 INFO L226 Difference]: Without dead ends: 6710 [2023-04-01 12:18:15,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:18:15,968 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 116 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:18:15,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 394 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:18:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2023-04-01 12:18:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 6410. [2023-04-01 12:18:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6410 states, 5201 states have (on average 1.4122284176119977) internal successors, (7345), 5869 states have internal predecessors, (7345), 707 states have call successors, (707), 518 states have call predecessors, (707), 501 states have return successors, (811), 647 states have call predecessors, (811), 704 states have call successors, (811) [2023-04-01 12:18:16,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6410 states to 6410 states and 8863 transitions. [2023-04-01 12:18:16,485 INFO L78 Accepts]: Start accepts. Automaton has 6410 states and 8863 transitions. Word has length 90 [2023-04-01 12:18:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:18:16,486 INFO L495 AbstractCegarLoop]: Abstraction has 6410 states and 8863 transitions. [2023-04-01 12:18:16,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 12:18:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 6410 states and 8863 transitions. [2023-04-01 12:18:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 12:18:16,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:18:16,515 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:18:16,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:18:16,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:18:16,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:18:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash -690527842, now seen corresponding path program 1 times [2023-04-01 12:18:16,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:18:16,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073141629] [2023-04-01 12:18:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:16,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:18:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:18:17,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:18:17,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073141629] [2023-04-01 12:18:17,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073141629] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:18:17,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565901850] [2023-04-01 12:18:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:18:17,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:18:17,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:18:17,665 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) [2023-04-01 12:18:17,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 12:18:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:18:17,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-01 12:18:17,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:18:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:18:18,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:18:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:18:20,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565901850] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:18:20,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918988325] [2023-04-01 12:18:21,006 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2023-04-01 12:18:21,006 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:18:21,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:18:21,014 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:18:21,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:18:22,405 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 153 for LOIs [2023-04-01 12:18:22,767 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 143 for LOIs [2023-04-01 12:18:23,562 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:18:24,125 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:18:24,271 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:18:24,396 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 12:18:25,565 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 12:18:25,771 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:18:25,984 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:18:26,438 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 29 [2023-04-01 12:18:27,226 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 39294 conjuctions. This might take some time... [2023-04-01 12:18:27,795 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 54 conjuctions. [2023-04-01 12:18:28,343 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:18:28,990 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:18:29,139 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:18:29,241 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 12:18:30,333 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 12:18:30,525 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:18:30,673 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:18:34,045 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2023-04-01 12:18:34,421 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 137 for LOIs [2023-04-01 12:18:36,174 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2023-04-01 12:18:43,622 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2023-04-01 12:18:45,740 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 22