/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/eca-rers2012/Problem19_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:33:13,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:33:13,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:33:13,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:33:13,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:33:13,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:33:13,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:33:13,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:33:13,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:33:13,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:33:13,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:33:13,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:33:13,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:33:13,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:33:13,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:33:13,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:33:13,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:33:13,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:33:13,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:33:13,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:33:13,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:33:13,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:33:13,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:33:13,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:33:13,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 10:33:13,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:33:13,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:33:13,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:33:13,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:33:13,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:33:13,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:33:13,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:33:13,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:33:13,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:33:13,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:33:13,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:33:13,734 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 10:33:13,771 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:33:13,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:33:13,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:33:13,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:33:13,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:33:13,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:33:13,772 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:33:13,772 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:33:13,772 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:33:13,772 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:33:13,773 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:33:13,773 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:33:13,773 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:33:13,773 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:33:13,773 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:33:13,773 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:33:13,773 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:33:13,774 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:33:13,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:33:13,774 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:33:13,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:33:13,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:33:13,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:33:13,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:33:13,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:33:13,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:33:13,775 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:33:13,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:33:13,775 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:33:13,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:33:13,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:33:13,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:33:13,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:33:13,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:33:13,776 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:33:13,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:33:13,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:33:13,776 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:33:13,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:33:13,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:33:13,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:33:13,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:33:14,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:33:14,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:33:14,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:33:14,122 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:33:14,124 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:33:14,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label07.c [2023-04-01 10:33:15,130 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:33:15,615 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:33:15,616 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label07.c [2023-04-01 10:33:15,695 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3d436ae1/ee2eef714fe544bd84d1a168bde5a8cd/FLAG634a88738 [2023-04-01 10:33:15,724 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3d436ae1/ee2eef714fe544bd84d1a168bde5a8cd [2023-04-01 10:33:15,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:33:15,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:33:15,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:33:15,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:33:15,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:33:15,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:33:15" (1/1) ... [2023-04-01 10:33:15,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a72b54a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:15, skipping insertion in model container [2023-04-01 10:33:15,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:33:15" (1/1) ... [2023-04-01 10:33:15,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:33:15,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:33:16,208 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/eca-rers2012/Problem19_label07.c[7920,7933] [2023-04-01 10:33:17,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:33:17,107 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:33:17,141 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/eca-rers2012/Problem19_label07.c[7920,7933] [2023-04-01 10:33:17,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:33:17,673 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:33:17,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17 WrapperNode [2023-04-01 10:33:17,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:33:17,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:33:17,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:33:17,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:33:17,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17" (1/1) ... [2023-04-01 10:33:17,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17" (1/1) ... [2023-04-01 10:33:17,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17" (1/1) ... [2023-04-01 10:33:17,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17" (1/1) ... [2023-04-01 10:33:17,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17" (1/1) ... [2023-04-01 10:33:17,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17" (1/1) ... [2023-04-01 10:33:17,919 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17" (1/1) ... [2023-04-01 10:33:17,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17" (1/1) ... [2023-04-01 10:33:17,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:33:17,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:33:17,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:33:17,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:33:17,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17" (1/1) ... [2023-04-01 10:33:18,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:33:18,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:33:18,039 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 10:33:18,065 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 10:33:18,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:33:18,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:33:18,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:33:18,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:33:18,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:33:18,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:33:18,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:33:18,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 10:33:18,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 10:33:18,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:33:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:33:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:33:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:33:18,134 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:33:18,135 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:33:23,677 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:33:36,447 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:33:36,447 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:33:36,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:33:36 BoogieIcfgContainer [2023-04-01 10:33:36,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:33:36,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:33:36,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:33:36,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:33:36,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:33:15" (1/3) ... [2023-04-01 10:33:36,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f66a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:33:36, skipping insertion in model container [2023-04-01 10:33:36,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:17" (2/3) ... [2023-04-01 10:33:36,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f66a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:33:36, skipping insertion in model container [2023-04-01 10:33:36,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:33:36" (3/3) ... [2023-04-01 10:33:36,458 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label07.c [2023-04-01 10:33:36,471 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:33:36,472 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:33:36,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:33:36,534 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;@247777c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:33:36,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:33:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 10:33:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:33:36,547 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:33:36,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:33:36,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:33:36,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:33:36,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1235906019, now seen corresponding path program 1 times [2023-04-01 10:33:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:33:36,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167656973] [2023-04-01 10:33:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:33:36,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:33:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:33:36,818 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 10:33:36,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:33:36,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167656973] [2023-04-01 10:33:36,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167656973] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:33:36,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:33:36,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:33:36,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923313511] [2023-04-01 10:33:36,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:33:36,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:33:36,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:33:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:33:36,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:33:36,854 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:33:43,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 10:33:43,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:33:43,633 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 10:33:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:33:43,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:33:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:33:43,669 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 10:33:43,670 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 10:33:43,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 10:33:43,680 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1191 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3808 mSolverCounterSat, 914 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 3808 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:33:43,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 259 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 3808 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 10:33:43,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 10:33:43,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 10:33:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.8872046366473474) internal successors, (4233), 2243 states have internal predecessors, (4233), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 10:33:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4268 transitions. [2023-04-01 10:33:43,770 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4268 transitions. Word has length 11 [2023-04-01 10:33:43,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:33:43,770 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 4268 transitions. [2023-04-01 10:33:43,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:33:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4268 transitions. [2023-04-01 10:33:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:33:43,772 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:33:43,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:33:43,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:33:43,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:33:43,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:33:43,773 INFO L85 PathProgramCache]: Analyzing trace with hash -154048065, now seen corresponding path program 1 times [2023-04-01 10:33:43,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:33:43,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798768418] [2023-04-01 10:33:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:33:43,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:33:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:33:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:33:43,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:33:43,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798768418] [2023-04-01 10:33:43,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798768418] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:33:43,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:33:43,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:33:43,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787179838] [2023-04-01 10:33:43,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:33:43,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:33:43,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:33:43,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:33:43,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:33:43,884 INFO L87 Difference]: Start difference. First operand 2269 states and 4268 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:33:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:33:50,332 INFO L93 Difference]: Finished difference Result 6869 states and 12971 transitions. [2023-04-01 10:33:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:33:50,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 10:33:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:33:50,350 INFO L225 Difference]: With dead ends: 6869 [2023-04-01 10:33:50,350 INFO L226 Difference]: Without dead ends: 4605 [2023-04-01 10:33:50,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:33:50,355 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 3856 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 2061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3856 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2061 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:33:50,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3856 Valid, 148 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2061 Valid, 6432 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-04-01 10:33:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2023-04-01 10:33:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4572. [2023-04-01 10:33:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4507 states have (on average 1.8011981362325271) internal successors, (8118), 4511 states have internal predecessors, (8118), 23 states have call successors, (23), 23 states have call predecessors, (23), 41 states have return successors, (120), 37 states have call predecessors, (120), 22 states have call successors, (120) [2023-04-01 10:33:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 8261 transitions. [2023-04-01 10:33:50,437 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 8261 transitions. Word has length 25 [2023-04-01 10:33:50,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:33:50,438 INFO L495 AbstractCegarLoop]: Abstraction has 4572 states and 8261 transitions. [2023-04-01 10:33:50,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:33:50,438 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 8261 transitions. [2023-04-01 10:33:50,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:33:50,439 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:33:50,439 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 10:33:50,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:33:50,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:33:50,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:33:50,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1365363255, now seen corresponding path program 1 times [2023-04-01 10:33:50,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:33:50,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507545761] [2023-04-01 10:33:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:33:50,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:33:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:33:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:33:50,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:33:50,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507545761] [2023-04-01 10:33:50,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507545761] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:33:50,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:33:50,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:33:50,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927706125] [2023-04-01 10:33:50,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:33:50,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:33:50,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:33:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:33:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:33:50,616 INFO L87 Difference]: Start difference. First operand 4572 states and 8261 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:33:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:33:57,885 INFO L93 Difference]: Finished difference Result 13013 states and 23486 transitions. [2023-04-01 10:33:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:33:57,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-04-01 10:33:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:33:57,924 INFO L225 Difference]: With dead ends: 13013 [2023-04-01 10:33:57,924 INFO L226 Difference]: Without dead ends: 8446 [2023-04-01 10:33:57,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:33:57,932 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3801 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6861 mSolverCounterSat, 1739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 8600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1739 IncrementalHoareTripleChecker+Valid, 6861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:33:57,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3801 Valid, 184 Invalid, 8600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1739 Valid, 6861 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-04-01 10:33:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2023-04-01 10:33:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 8256. [2023-04-01 10:33:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8256 states, 8050 states have (on average 1.5526708074534161) internal successors, (12499), 8078 states have internal predecessors, (12499), 38 states have call successors, (38), 38 states have call predecessors, (38), 167 states have return successors, (593), 139 states have call predecessors, (593), 37 states have call successors, (593) [2023-04-01 10:33:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8256 states to 8256 states and 13130 transitions. [2023-04-01 10:33:58,089 INFO L78 Accepts]: Start accepts. Automaton has 8256 states and 13130 transitions. Word has length 29 [2023-04-01 10:33:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:33:58,090 INFO L495 AbstractCegarLoop]: Abstraction has 8256 states and 13130 transitions. [2023-04-01 10:33:58,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:33:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8256 states and 13130 transitions. [2023-04-01 10:33:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 10:33:58,091 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:33:58,091 INFO L195 NwaCegarLoop]: trace histogram [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 10:33:58,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:33:58,091 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:33:58,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:33:58,093 INFO L85 PathProgramCache]: Analyzing trace with hash 696920751, now seen corresponding path program 1 times [2023-04-01 10:33:58,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:33:58,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184589603] [2023-04-01 10:33:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:33:58,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:33:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:33:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:33:58,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:33:58,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184589603] [2023-04-01 10:33:58,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184589603] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:33:58,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:33:58,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:33:58,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371804765] [2023-04-01 10:33:58,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:33:58,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:33:58,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:33:58,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:33:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:33:58,212 INFO L87 Difference]: Start difference. First operand 8256 states and 13130 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:34:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:34:05,109 INFO L93 Difference]: Finished difference Result 25277 states and 41484 transitions. [2023-04-01 10:34:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:34:05,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-04-01 10:34:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:34:05,165 INFO L225 Difference]: With dead ends: 25277 [2023-04-01 10:34:05,165 INFO L226 Difference]: Without dead ends: 17026 [2023-04-01 10:34:05,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:34:05,185 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 5996 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 6471 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5996 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 7175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 6471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:34:05,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5996 Valid, 146 Invalid, 7175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 6471 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-04-01 10:34:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17026 states. [2023-04-01 10:34:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17026 to 16791. [2023-04-01 10:34:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16791 states, 16256 states have (on average 1.4953248031496063) internal successors, (24308), 16346 states have internal predecessors, (24308), 74 states have call successors, (74), 74 states have call predecessors, (74), 460 states have return successors, (2019), 370 states have call predecessors, (2019), 73 states have call successors, (2019) [2023-04-01 10:34:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 26401 transitions. [2023-04-01 10:34:05,536 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 26401 transitions. Word has length 33 [2023-04-01 10:34:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:34:05,536 INFO L495 AbstractCegarLoop]: Abstraction has 16791 states and 26401 transitions. [2023-04-01 10:34:05,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:34:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 26401 transitions. [2023-04-01 10:34:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 10:34:05,543 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:34:05,543 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 10:34:05,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:34:05,543 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:34:05,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:34:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash 2079907225, now seen corresponding path program 1 times [2023-04-01 10:34:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:34:05,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051671723] [2023-04-01 10:34:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:34:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:34:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:34:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:34:05,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:34:05,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051671723] [2023-04-01 10:34:05,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051671723] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:34:05,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:34:05,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:34:05,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073221093] [2023-04-01 10:34:05,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:34:05,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:34:05,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:34:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:34:05,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:34:05,707 INFO L87 Difference]: Start difference. First operand 16791 states and 26401 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:34:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:34:13,338 INFO L93 Difference]: Finished difference Result 49700 states and 79392 transitions. [2023-04-01 10:34:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:34:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2023-04-01 10:34:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:34:13,549 INFO L225 Difference]: With dead ends: 49700 [2023-04-01 10:34:13,549 INFO L226 Difference]: Without dead ends: 32914 [2023-04-01 10:34:13,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:34:13,600 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 3809 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7228 mSolverCounterSat, 1777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3809 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 9005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1777 IncrementalHoareTripleChecker+Valid, 7228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:34:13,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3809 Valid, 197 Invalid, 9005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1777 Valid, 7228 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 10:34:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32914 states. [2023-04-01 10:34:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32914 to 27058. [2023-04-01 10:34:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27058 states, 25964 states have (on average 1.3549144969958404) internal successors, (35179), 26172 states have internal predecessors, (35179), 115 states have call successors, (115), 115 states have call predecessors, (115), 978 states have return successors, (4238), 770 states have call predecessors, (4238), 114 states have call successors, (4238) [2023-04-01 10:34:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27058 states to 27058 states and 39532 transitions. [2023-04-01 10:34:14,053 INFO L78 Accepts]: Start accepts. Automaton has 27058 states and 39532 transitions. Word has length 53 [2023-04-01 10:34:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:34:14,055 INFO L495 AbstractCegarLoop]: Abstraction has 27058 states and 39532 transitions. [2023-04-01 10:34:14,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:34:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 27058 states and 39532 transitions. [2023-04-01 10:34:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 10:34:14,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:34:14,056 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2023-04-01 10:34:14,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:34:14,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:34:14,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:34:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1231197586, now seen corresponding path program 1 times [2023-04-01 10:34:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:34:14,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093023310] [2023-04-01 10:34:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:34:14,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:34:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:34:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 10:34:14,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:34:14,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093023310] [2023-04-01 10:34:14,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093023310] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:34:14,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475716427] [2023-04-01 10:34:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:34:14,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:34:14,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:34:14,218 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 10:34:14,221 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 10:34:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:34:14,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:34:14,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:34:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 10:34:14,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:34:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475716427] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:34:14,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:34:14,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:34:14,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832481333] [2023-04-01 10:34:14,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:34:14,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:34:14,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:34:14,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:34:14,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:34:14,422 INFO L87 Difference]: Start difference. First operand 27058 states and 39532 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)