/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:28:53,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:28:53,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:28:53,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:28:53,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:28:53,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:28:53,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:28:53,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:28:53,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:28:53,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:28:53,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:28:53,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 20:28:53,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 20:28:53,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 20:28:53,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 20:28:53,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 20:28:53,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 20:28:53,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 20:28:53,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 20:28:53,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 20:28:53,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 20:28:53,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 20:28:53,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 20:28:53,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 20:28:53,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 20:28:53,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 20:28:53,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 20:28:53,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 20:28:53,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 20:28:53,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 20:28:53,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 20:28:53,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 20:28:53,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 20:28:53,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 20:28:53,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 20:28:53,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 20:28:53,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 20:28:53,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 20:28:53,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:28:53,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:28:53,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:28:53,582 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 [2023-04-02 20:28:53,607 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:28:53,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:28:53,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:28:53,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:28:53,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:28:53,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:28:53,608 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:28:53,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:28:53,608 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:28:53,609 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:28:53,609 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:28:53,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:28:53,609 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:28:53,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:28:53,610 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:28:53,610 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:28:53,610 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:28:53,610 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:28:53,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:28:53,610 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:28:53,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:28:53,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:28:53,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:28:53,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:28:53,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:28:53,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:28:53,611 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:28:53,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:28:53,611 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:28:53,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:28:53,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:28:53,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:28:53,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:28:53,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:28:53,612 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:28:53,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:28:53,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:28:53,613 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:28:53,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:28:53,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:28:53,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:28:53,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:28:53,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:28:53,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:28:53,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:28:53,851 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:28:53,852 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:28:53,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label30.c [2023-04-02 20:28:54,917 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:28:55,151 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:28:55,151 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label30.c [2023-04-02 20:28:55,168 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2a24a45/dc60794dd002492b8a62597c69a58390/FLAGbed07f444 [2023-04-02 20:28:55,178 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2a24a45/dc60794dd002492b8a62597c69a58390 [2023-04-02 20:28:55,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:28:55,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:28:55,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:28:55,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:28:55,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:28:55,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:28:55" (1/1) ... [2023-04-02 20:28:55,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65331155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:55, skipping insertion in model container [2023-04-02 20:28:55,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:28:55" (1/1) ... [2023-04-02 20:28:55,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:28:55,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:28:55,459 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/Problem18_label30.c[4655,4668] [2023-04-02 20:28:55,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:28:55,953 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:28:55,971 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/Problem18_label30.c[4655,4668] [2023-04-02 20:28:56,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:28:56,154 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:28:56,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56 WrapperNode [2023-04-02 20:28:56,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:28:56,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:28:56,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:28:56,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:28:56,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56" (1/1) ... [2023-04-02 20:28:56,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56" (1/1) ... [2023-04-02 20:28:56,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56" (1/1) ... [2023-04-02 20:28:56,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56" (1/1) ... [2023-04-02 20:28:56,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56" (1/1) ... [2023-04-02 20:28:56,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56" (1/1) ... [2023-04-02 20:28:56,311 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56" (1/1) ... [2023-04-02 20:28:56,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56" (1/1) ... [2023-04-02 20:28:56,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:28:56,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:28:56,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:28:56,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:28:56,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56" (1/1) ... [2023-04-02 20:28:56,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:28:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:28:56,397 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) [2023-04-02 20:28:56,403 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 [2023-04-02 20:28:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:28:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:28:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:28:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 20:28:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 20:28:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 20:28:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:28:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 20:28:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 20:28:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:28:56,492 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:28:56,494 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:28:58,690 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:29:04,669 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:29:04,670 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 20:29:04,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:29:04 BoogieIcfgContainer [2023-04-02 20:29:04,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:29:04,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:29:04,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:29:04,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:29:04,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:28:55" (1/3) ... [2023-04-02 20:29:04,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766c5421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:29:04, skipping insertion in model container [2023-04-02 20:29:04,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:28:56" (2/3) ... [2023-04-02 20:29:04,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766c5421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:29:04, skipping insertion in model container [2023-04-02 20:29:04,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:29:04" (3/3) ... [2023-04-02 20:29:04,678 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label30.c [2023-04-02 20:29:04,691 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:29:04,692 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:29:04,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:29:04,743 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;@481f8f04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:29:04,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:29:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 20:29:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 20:29:04,753 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:29:04,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:29:04,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:29:04,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:29:04,757 INFO L85 PathProgramCache]: Analyzing trace with hash 314232579, now seen corresponding path program 1 times [2023-04-02 20:29:04,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:29:04,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805469375] [2023-04-02 20:29:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:29:04,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:29:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:29:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:29:04,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:29:04,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805469375] [2023-04-02 20:29:04,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805469375] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:29:04,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:29:04,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:29:04,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409651097] [2023-04-02 20:29:04,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:29:04,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:29:04,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:29:05,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:29:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:29:05,027 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2023-04-02 20:29:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:29:06,867 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-02 20:29:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:29:06,869 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 [2023-04-02 20:29:06,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:29:06,882 INFO L225 Difference]: With dead ends: 1393 [2023-04-02 20:29:06,882 INFO L226 Difference]: Without dead ends: 921 [2023-04-02 20:29:06,886 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 [2023-04-02 20:29:06,888 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 20:29:06,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 20:29:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-02 20:29:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-02 20:29:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-02 20:29:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions. [2023-04-02 20:29:06,951 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11 [2023-04-02 20:29:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:29:06,951 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions. [2023-04-02 20:29:06,951 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) [2023-04-02 20:29:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions. [2023-04-02 20:29:06,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 20:29:06,952 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:29:06,952 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:29:06,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:29:06,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:29:06,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:29:06,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1725911511, now seen corresponding path program 1 times [2023-04-02 20:29:06,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:29:06,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409054734] [2023-04-02 20:29:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:29:06,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:29:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:29:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:29:07,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:29:07,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409054734] [2023-04-02 20:29:07,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409054734] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:29:07,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:29:07,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:29:07,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045124341] [2023-04-02 20:29:07,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:29:07,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:29:07,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:29:07,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:29:07,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:29:07,073 INFO L87 Difference]: Start difference. First operand 919 states and 1512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-04-02 20:29:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:29:09,346 INFO L93 Difference]: Finished difference Result 2781 states and 4622 transitions. [2023-04-02 20:29:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:29:09,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-02 20:29:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:29:09,357 INFO L225 Difference]: With dead ends: 2781 [2023-04-02 20:29:09,357 INFO L226 Difference]: Without dead ends: 1867 [2023-04-02 20:29:09,363 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 [2023-04-02 20:29:09,365 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:29:09,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 20:29:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-04-02 20:29:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822. [2023-04-02 20:29:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-02 20:29:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions. [2023-04-02 20:29:09,450 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21 [2023-04-02 20:29:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:29:09,450 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions. [2023-04-02 20:29:09,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-04-02 20:29:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions. [2023-04-02 20:29:09,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 20:29:09,451 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:29:09,451 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] [2023-04-02 20:29:09,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:29:09,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:29:09,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:29:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1702728607, now seen corresponding path program 1 times [2023-04-02 20:29:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:29:09,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922662903] [2023-04-02 20:29:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:29:09,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:29:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:29:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:29:09,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:29:09,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922662903] [2023-04-02 20:29:09,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922662903] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:29:09,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:29:09,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:29:09,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118379292] [2023-04-02 20:29:09,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:29:09,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:29:09,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:29:09,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:29:09,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:29:09,668 INFO L87 Difference]: Start difference. First operand 1822 states and 2823 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) [2023-04-02 20:29:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:29:11,603 INFO L93 Difference]: Finished difference Result 5051 states and 8054 transitions. [2023-04-02 20:29:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:29:11,604 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 [2023-04-02 20:29:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:29:11,615 INFO L225 Difference]: With dead ends: 5051 [2023-04-02 20:29:11,615 INFO L226 Difference]: Without dead ends: 3234 [2023-04-02 20:29:11,619 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 [2023-04-02 20:29:11,620 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 20:29:11,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-02 20:29:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-04-02 20:29:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207. [2023-04-02 20:29:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-02 20:29:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions. [2023-04-02 20:29:11,680 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25 [2023-04-02 20:29:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:29:11,681 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions. [2023-04-02 20:29:11,681 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) [2023-04-02 20:29:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions. [2023-04-02 20:29:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 20:29:11,682 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:29:11,682 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, 1, 1, 1, 1, 1] [2023-04-02 20:29:11,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 20:29:11,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:29:11,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:29:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash -964264874, now seen corresponding path program 1 times [2023-04-02 20:29:11,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:29:11,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915496631] [2023-04-02 20:29:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:29:11,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:29:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:29:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:29:11,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:29:11,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915496631] [2023-04-02 20:29:11,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915496631] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:29:11,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:29:11,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:29:11,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633698741] [2023-04-02 20:29:11,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:29:11,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:29:11,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:29:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:29:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:29:11,771 INFO L87 Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 20:29:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:29:13,097 INFO L93 Difference]: Finished difference Result 6434 states and 9164 transitions. [2023-04-02 20:29:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:29:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-04-02 20:29:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:29:13,106 INFO L225 Difference]: With dead ends: 6434 [2023-04-02 20:29:13,107 INFO L226 Difference]: Without dead ends: 3232 [2023-04-02 20:29:13,111 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 [2023-04-02 20:29:13,112 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 503 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 20:29:13,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 786 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 20:29:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2023-04-02 20:29:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3207. [2023-04-02 20:29:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3651649746192893) internal successors, (4303), 3163 states have internal predecessors, (4303), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (132), 26 states have call predecessors, (132), 16 states have call successors, (132) [2023-04-02 20:29:13,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4452 transitions. [2023-04-02 20:29:13,177 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4452 transitions. Word has length 58 [2023-04-02 20:29:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:29:13,178 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4452 transitions. [2023-04-02 20:29:13,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 20:29:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4452 transitions. [2023-04-02 20:29:13,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 20:29:13,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:29:13,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-02 20:29:13,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 20:29:13,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:29:13,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:29:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash 505286588, now seen corresponding path program 1 times [2023-04-02 20:29:13,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:29:13,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519832744] [2023-04-02 20:29:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:29:13,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:29:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:29:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 20:29:13,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:29:13,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519832744] [2023-04-02 20:29:13,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519832744] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:29:13,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:29:13,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:29:13,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883478899] [2023-04-02 20:29:13,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:29:13,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:29:13,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:29:13,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:29:13,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:29:13,307 INFO L87 Difference]: Start difference. First operand 3207 states and 4452 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 20:29:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:29:14,933 INFO L93 Difference]: Finished difference Result 9127 states and 12555 transitions. [2023-04-02 20:29:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:29:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-04-02 20:29:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:29:14,951 INFO L225 Difference]: With dead ends: 9127 [2023-04-02 20:29:14,951 INFO L226 Difference]: Without dead ends: 5925 [2023-04-02 20:29:14,961 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 [2023-04-02 20:29:14,964 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 451 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 20:29:14,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 905 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 20:29:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2023-04-02 20:29:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 5866. [2023-04-02 20:29:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5866 states, 5778 states have (on average 1.248355832467982) internal successors, (7213), 5797 states have internal predecessors, (7213), 29 states have call successors, (29), 29 states have call predecessors, (29), 58 states have return successors, (303), 39 states have call predecessors, (303), 28 states have call successors, (303) [2023-04-02 20:29:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 7545 transitions. [2023-04-02 20:29:15,070 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 7545 transitions. Word has length 68 [2023-04-02 20:29:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:29:15,072 INFO L495 AbstractCegarLoop]: Abstraction has 5866 states and 7545 transitions. [2023-04-02 20:29:15,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 20:29:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 7545 transitions. [2023-04-02 20:29:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 20:29:15,077 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:29:15,077 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:29:15,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 20:29:15,077 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:29:15,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:29:15,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1388865335, now seen corresponding path program 1 times [2023-04-02 20:29:15,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:29:15,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136808580] [2023-04-02 20:29:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:29:15,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:29:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:29:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:29:15,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:29:15,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136808580] [2023-04-02 20:29:15,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136808580] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:29:15,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364706453] [2023-04-02 20:29:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:29:15,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:29:15,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:29:15,217 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) [2023-04-02 20:29:15,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 20:29:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:29:15,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 20:29:15,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:29:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:29:15,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 20:29:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:29:15,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364706453] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 20:29:15,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [332168244] [2023-04-02 20:29:15,516 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-04-02 20:29:15,516 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 20:29:15,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 20:29:15,522 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 20:29:15,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 20:29:15,727 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-02 20:29:15,847 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 37 [2023-04-02 20:29:25,232 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 141150 conjuctions. This might take some time... [2023-04-02 20:29:45,868 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1934 conjuctions. [2023-04-02 20:29:58,162 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24