/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/Problem13_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:04:14,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:04:14,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:04:14,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:04:14,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:04:14,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:04:14,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:04:14,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:04:14,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:04:14,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:04:14,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:04:14,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:04:14,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:04:14,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:04:14,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:04:14,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:04:14,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:04:14,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:04:14,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:04:14,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:04:14,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:04:14,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:04:14,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:04:14,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:04:14,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:04:14,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:04:14,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:04:14,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:04:14,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:04:14,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:04:14,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:04:14,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:04:14,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:04:14,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:04:14,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:04:14,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:04:14,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:04:14,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:04:14,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:04:14,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:04:14,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:04:14,627 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 04:04:14,656 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:04:14,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:04:14,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:04:14,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:04:14,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:04:14,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:04:14,658 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:04:14,658 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:04:14,659 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:04:14,659 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:04:14,659 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:04:14,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:04:14,660 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:04:14,660 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:04:14,660 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:04:14,660 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:04:14,660 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:04:14,660 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:04:14,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:04:14,661 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:04:14,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:04:14,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:04:14,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:04:14,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:04:14,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:04:14,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:04:14,662 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:04:14,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:04:14,662 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:04:14,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:04:14,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:04:14,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:04:14,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:04:14,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:04:14,663 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:04:14,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:04:14,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:04:14,663 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:04:14,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:04:14,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:04:14,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:04:14,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:04:14,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:04:14,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:04:14,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:04:14,931 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:04:14,932 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:04:14,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label06.c [2023-04-01 04:04:16,106 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:04:16,561 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:04:16,561 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label06.c [2023-04-01 04:04:16,597 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59180113c/f1c28c185c08437ea4308051ce87cf2f/FLAG46f40ff3a [2023-04-01 04:04:16,613 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59180113c/f1c28c185c08437ea4308051ce87cf2f [2023-04-01 04:04:16,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:04:16,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:04:16,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:04:16,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:04:16,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:04:16,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:04:16" (1/1) ... [2023-04-01 04:04:16,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd376c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:16, skipping insertion in model container [2023-04-01 04:04:16,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:04:16" (1/1) ... [2023-04-01 04:04:16,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:04:16,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:04:17,058 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/Problem13_label06.c[3786,3799] [2023-04-01 04:04:17,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:04:17,845 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:04:17,870 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/Problem13_label06.c[3786,3799] [2023-04-01 04:04:18,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:04:18,416 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:04:18,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18 WrapperNode [2023-04-01 04:04:18,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:04:18,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:04:18,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:04:18,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:04:18,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18" (1/1) ... [2023-04-01 04:04:18,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18" (1/1) ... [2023-04-01 04:04:18,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18" (1/1) ... [2023-04-01 04:04:18,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18" (1/1) ... [2023-04-01 04:04:18,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18" (1/1) ... [2023-04-01 04:04:18,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18" (1/1) ... [2023-04-01 04:04:18,674 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18" (1/1) ... [2023-04-01 04:04:18,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18" (1/1) ... [2023-04-01 04:04:18,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:04:18,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:04:18,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:04:18,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:04:18,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18" (1/1) ... [2023-04-01 04:04:18,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:04:18,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:18,769 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 04:04:18,791 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 04:04:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:04:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:04:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:04:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:04:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:04:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:04:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:04:18,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:04:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:04:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:04:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:04:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:04:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:04:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:04:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:04:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:04:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:04:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:04:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:04:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:04:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:04:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:04:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:04:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:04:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:04:18,913 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:04:18,915 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:04:23,601 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:04:26,206 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:04:26,206 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:04:26,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:04:26 BoogieIcfgContainer [2023-04-01 04:04:26,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:04:26,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:04:26,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:04:26,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:04:26,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:04:16" (1/3) ... [2023-04-01 04:04:26,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d4c550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:04:26, skipping insertion in model container [2023-04-01 04:04:26,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:18" (2/3) ... [2023-04-01 04:04:26,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d4c550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:04:26, skipping insertion in model container [2023-04-01 04:04:26,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:04:26" (3/3) ... [2023-04-01 04:04:26,216 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label06.c [2023-04-01 04:04:26,233 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:04:26,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:04:26,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:04:26,300 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;@591652f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:04:26,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:04:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:04:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:04:26,314 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:26,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:26,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:26,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash -134421739, now seen corresponding path program 1 times [2023-04-01 04:04:26,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:26,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522797243] [2023-04-01 04:04:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:26,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:26,666 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 04:04:26,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:26,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522797243] [2023-04-01 04:04:26,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522797243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:26,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:26,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:26,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804773523] [2023-04-01 04:04:26,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:26,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:26,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:26,716 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 04:04:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:30,322 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:04:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:30,324 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 04:04:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:30,344 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:04:30,344 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:04:30,352 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 04:04:30,355 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 713 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:30,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 215 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 04:04:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:04:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1367. [2023-04-01 04:04:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1349 states have (on average 1.8465530022238696) internal successors, (2491), 1349 states have internal predecessors, (2491), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:04:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2514 transitions. [2023-04-01 04:04:30,483 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2514 transitions. Word has length 11 [2023-04-01 04:04:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:30,484 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 2514 transitions. [2023-04-01 04:04:30,484 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 04:04:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2514 transitions. [2023-04-01 04:04:30,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:04:30,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:30,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:30,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:04:30,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:30,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:30,487 INFO L85 PathProgramCache]: Analyzing trace with hash -954024242, now seen corresponding path program 1 times [2023-04-01 04:04:30,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:30,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761806232] [2023-04-01 04:04:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:30,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:30,677 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 04:04:30,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761806232] [2023-04-01 04:04:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761806232] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:30,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:30,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893859024] [2023-04-01 04:04:30,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:30,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:30,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:30,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:30,680 INFO L87 Difference]: Start difference. First operand 1367 states and 2514 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) [2023-04-01 04:04:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:35,362 INFO L93 Difference]: Finished difference Result 4166 states and 7684 transitions. [2023-04-01 04:04:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:04:35,363 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 [2023-04-01 04:04:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:35,378 INFO L225 Difference]: With dead ends: 4166 [2023-04-01 04:04:35,379 INFO L226 Difference]: Without dead ends: 2804 [2023-04-01 04:04:35,390 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 04:04:35,393 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2397 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3932 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 5090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 3932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:35,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2397 Valid, 111 Invalid, 5090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 3932 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 04:04:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2023-04-01 04:04:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2742. [2023-04-01 04:04:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2742 states, 2700 states have (on average 1.5640740740740742) internal successors, (4223), 2704 states have internal predecessors, (4223), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-04-01 04:04:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 4312 transitions. [2023-04-01 04:04:35,503 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 4312 transitions. Word has length 21 [2023-04-01 04:04:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:35,503 INFO L495 AbstractCegarLoop]: Abstraction has 2742 states and 4312 transitions. [2023-04-01 04:04:35,504 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) [2023-04-01 04:04:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 4312 transitions. [2023-04-01 04:04:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:04:35,505 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:35,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:35,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:04:35,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:35,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash -586546262, now seen corresponding path program 1 times [2023-04-01 04:04:35,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:35,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842161372] [2023-04-01 04:04:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:35,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:35,708 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 04:04:35,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:35,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842161372] [2023-04-01 04:04:35,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842161372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:35,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:35,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:35,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333496351] [2023-04-01 04:04:35,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:35,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:35,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:35,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:35,712 INFO L87 Difference]: Start difference. First operand 2742 states and 4312 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:04:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:40,714 INFO L93 Difference]: Finished difference Result 8492 states and 13675 transitions. [2023-04-01 04:04:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:04:40,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:04:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:40,747 INFO L225 Difference]: With dead ends: 8492 [2023-04-01 04:04:40,747 INFO L226 Difference]: Without dead ends: 5755 [2023-04-01 04:04:40,758 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 04:04:40,762 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2173 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4957 mSolverCounterSat, 852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2173 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 5809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 4957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:40,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2173 Valid, 128 Invalid, 5809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 4957 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-04-01 04:04:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2023-04-01 04:04:40,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5619. [2023-04-01 04:04:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5619 states, 5483 states have (on average 1.3913915739558635) internal successors, (7629), 5514 states have internal predecessors, (7629), 27 states have call successors, (27), 27 states have call predecessors, (27), 108 states have return successors, (423), 77 states have call predecessors, (423), 26 states have call successors, (423) [2023-04-01 04:04:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5619 states to 5619 states and 8079 transitions. [2023-04-01 04:04:40,935 INFO L78 Accepts]: Start accepts. Automaton has 5619 states and 8079 transitions. Word has length 23 [2023-04-01 04:04:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:40,936 INFO L495 AbstractCegarLoop]: Abstraction has 5619 states and 8079 transitions. [2023-04-01 04:04:40,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:04:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 5619 states and 8079 transitions. [2023-04-01 04:04:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:04:40,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:40,937 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 04:04:40,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:04:40,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:40,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:40,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1370517378, now seen corresponding path program 1 times [2023-04-01 04:04:40,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:40,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395232609] [2023-04-01 04:04:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:40,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:41,104 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 04:04:41,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:41,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395232609] [2023-04-01 04:04:41,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395232609] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:41,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:41,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:41,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603835360] [2023-04-01 04:04:41,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:41,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:41,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:41,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:41,107 INFO L87 Difference]: Start difference. First operand 5619 states and 8079 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 04:04:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:45,772 INFO L93 Difference]: Finished difference Result 17146 states and 26271 transitions. [2023-04-01 04:04:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:04:45,773 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 04:04:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:45,835 INFO L225 Difference]: With dead ends: 17146 [2023-04-01 04:04:45,835 INFO L226 Difference]: Without dead ends: 11532 [2023-04-01 04:04:45,857 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 04:04:45,858 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2183 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4808 mSolverCounterSat, 999 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2183 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 5807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 999 IncrementalHoareTripleChecker+Valid, 4808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:45,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2183 Valid, 112 Invalid, 5807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [999 Valid, 4808 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-04-01 04:04:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11532 states. [2023-04-01 04:04:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11532 to 11126. [2023-04-01 04:04:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11126 states, 10801 states have (on average 1.360799925932784) internal successors, (14698), 10895 states have internal predecessors, (14698), 51 states have call successors, (51), 51 states have call predecessors, (51), 273 states have return successors, (1656), 179 states have call predecessors, (1656), 50 states have call successors, (1656) [2023-04-01 04:04:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11126 states to 11126 states and 16405 transitions. [2023-04-01 04:04:46,165 INFO L78 Accepts]: Start accepts. Automaton has 11126 states and 16405 transitions. Word has length 29 [2023-04-01 04:04:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:46,166 INFO L495 AbstractCegarLoop]: Abstraction has 11126 states and 16405 transitions. [2023-04-01 04:04:46,166 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 04:04:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 11126 states and 16405 transitions. [2023-04-01 04:04:46,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 04:04:46,167 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:46,168 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] [2023-04-01 04:04:46,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:04:46,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:46,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:46,169 INFO L85 PathProgramCache]: Analyzing trace with hash 550821790, now seen corresponding path program 1 times [2023-04-01 04:04:46,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:46,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136501108] [2023-04-01 04:04:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:46,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:46,260 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 04:04:46,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:46,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136501108] [2023-04-01 04:04:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136501108] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:46,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:46,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:46,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686325264] [2023-04-01 04:04:46,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:46,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:46,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:46,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:46,263 INFO L87 Difference]: Start difference. First operand 11126 states and 16405 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-04-01 04:04:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:49,306 INFO L93 Difference]: Finished difference Result 33013 states and 50947 transitions. [2023-04-01 04:04:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 45 [2023-04-01 04:04:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:49,404 INFO L225 Difference]: With dead ends: 33013 [2023-04-01 04:04:49,404 INFO L226 Difference]: Without dead ends: 21892 [2023-04-01 04:04:49,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:49,439 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 825 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:49,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 300 Invalid, 2728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 04:04:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21892 states. [2023-04-01 04:04:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21892 to 19248. [2023-04-01 04:04:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19248 states, 18753 states have (on average 1.3174958673278943) internal successors, (24707), 18889 states have internal predecessors, (24707), 89 states have call successors, (89), 89 states have call predecessors, (89), 405 states have return successors, (4033), 269 states have call predecessors, (4033), 88 states have call successors, (4033) [2023-04-01 04:04:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19248 states to 19248 states and 28829 transitions. [2023-04-01 04:04:49,926 INFO L78 Accepts]: Start accepts. Automaton has 19248 states and 28829 transitions. Word has length 45 [2023-04-01 04:04:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:49,927 INFO L495 AbstractCegarLoop]: Abstraction has 19248 states and 28829 transitions. [2023-04-01 04:04:49,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-04-01 04:04:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 19248 states and 28829 transitions. [2023-04-01 04:04:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 04:04:49,936 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:49,936 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:49,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:04:49,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:49,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash -56891852, now seen corresponding path program 1 times [2023-04-01 04:04:49,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:49,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996089322] [2023-04-01 04:04:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 04:04:50,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:50,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996089322] [2023-04-01 04:04:50,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996089322] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:50,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:50,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:50,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574284150] [2023-04-01 04:04:50,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:50,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:50,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:50,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:50,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:50,247 INFO L87 Difference]: Start difference. First operand 19248 states and 28829 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-04-01 04:04:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:53,855 INFO L93 Difference]: Finished difference Result 48005 states and 74584 transitions. [2023-04-01 04:04:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:53,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 79 [2023-04-01 04:04:53,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:53,976 INFO L225 Difference]: With dead ends: 48005 [2023-04-01 04:04:53,976 INFO L226 Difference]: Without dead ends: 28762 [2023-04-01 04:04:54,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:54,026 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 694 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 3002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:54,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 342 Invalid, 3002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 04:04:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28762 states. [2023-04-01 04:04:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28762 to 28612. [2023-04-01 04:04:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28612 states, 27949 states have (on average 1.3292067694729686) internal successors, (37150), 28127 states have internal predecessors, (37150), 131 states have call successors, (131), 131 states have call predecessors, (131), 531 states have return successors, (7550), 353 states have call predecessors, (7550), 130 states have call successors, (7550) [2023-04-01 04:04:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28612 states to 28612 states and 44831 transitions. [2023-04-01 04:04:54,703 INFO L78 Accepts]: Start accepts. Automaton has 28612 states and 44831 transitions. Word has length 79 [2023-04-01 04:04:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:54,704 INFO L495 AbstractCegarLoop]: Abstraction has 28612 states and 44831 transitions. [2023-04-01 04:04:54,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-04-01 04:04:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 28612 states and 44831 transitions. [2023-04-01 04:04:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 04:04:54,707 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:54,707 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, 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] [2023-04-01 04:04:54,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:04:54,708 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:54,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:54,708 INFO L85 PathProgramCache]: Analyzing trace with hash 212582859, now seen corresponding path program 1 times [2023-04-01 04:04:54,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:54,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378801719] [2023-04-01 04:04:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:54,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 04:04:54,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:54,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378801719] [2023-04-01 04:04:54,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378801719] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:54,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:54,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:54,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775890438] [2023-04-01 04:04:54,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:54,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:54,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:54,901 INFO L87 Difference]: Start difference. First operand 28612 states and 44831 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-04-01 04:04:58,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:58,363 INFO L93 Difference]: Finished difference Result 71425 states and 114420 transitions. [2023-04-01 04:04:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:58,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 93 [2023-04-01 04:04:58,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:58,510 INFO L225 Difference]: With dead ends: 71425 [2023-04-01 04:04:58,510 INFO L226 Difference]: Without dead ends: 42818 [2023-04-01 04:04:58,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:58,558 INFO L413 NwaCegarLoop]: 1249 mSDtfsCounter, 673 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:58,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1277 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 04:04:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42818 states. [2023-04-01 04:04:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42818 to 41602. [2023-04-01 04:04:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41602 states, 40731 states have (on average 1.2592619871842086) internal successors, (51291), 40954 states have internal predecessors, (51291), 192 states have call successors, (192), 192 states have call predecessors, (192), 678 states have return successors, (11426), 455 states have call predecessors, (11426), 191 states have call successors, (11426) [2023-04-01 04:04:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41602 states to 41602 states and 62909 transitions. [2023-04-01 04:04:59,447 INFO L78 Accepts]: Start accepts. Automaton has 41602 states and 62909 transitions. Word has length 93 [2023-04-01 04:04:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:59,447 INFO L495 AbstractCegarLoop]: Abstraction has 41602 states and 62909 transitions. [2023-04-01 04:04:59,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-04-01 04:04:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 41602 states and 62909 transitions. [2023-04-01 04:04:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 04:04:59,449 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:59,449 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 04:04:59,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:04:59,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:59,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:59,450 INFO L85 PathProgramCache]: Analyzing trace with hash -360469863, now seen corresponding path program 1 times [2023-04-01 04:04:59,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:59,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435512856] [2023-04-01 04:04:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:59,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:04:59,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:59,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435512856] [2023-04-01 04:04:59,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435512856] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:59,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212575861] [2023-04-01 04:04:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:59,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:59,895 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 04:04:59,899 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 04:05:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:05:00,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:05:00,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:05:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:05:00,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:05:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:05:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212575861] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:05:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [614124877] [2023-04-01 04:05:00,374 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-01 04:05:00,375 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:05:00,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:05:00,382 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:05:00,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:05:00,522 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 04:05:00,642 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2023-04-01 04:05:01,167 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 39876 conjuctions. This might take some time... [2023-04-01 04:05:04,256 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 634 conjuctions.