/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:15:49,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:15:49,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:15:49,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:15:49,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:15:49,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:15:49,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:15:49,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:15:49,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:15:49,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:15:49,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:15:49,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:15:49,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:15:49,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:15:49,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:15:49,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:15:49,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:15:49,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:15:49,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:15:49,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:15:49,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:15:49,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:15:49,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:15:49,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:15:49,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:15:49,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:15:49,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:15:49,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:15:49,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:15:49,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:15:49,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:15:49,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:15:49,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:15:49,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:15:49,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:15:49,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:15:49,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:15:49,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:15:49,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:15:49,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:15:49,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:15:49,564 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 [2023-03-31 22:15:49,592 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:15:49,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:15:49,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:15:49,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:15:49,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:15:49,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:15:49,594 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:15:49,595 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:15:49,595 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:15:49,595 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:15:49,595 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:15:49,596 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:15:49,596 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:15:49,596 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:15:49,596 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:15:49,596 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:15:49,596 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:15:49,596 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:15:49,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:15:49,597 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:15:49,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:15:49,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:15:49,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:15:49,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:15:49,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:15:49,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:15:49,598 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:15:49,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:15:49,598 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:15:49,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:15:49,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:15:49,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:15:49,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:15:49,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:15:49,599 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:15:49,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:15:49,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:15:49,600 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:15:49,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:15:49,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:15:49,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:15:49,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:15:49,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:15:49,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:15:49,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:15:49,838 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:15:49,838 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:15:49,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label14.c [2023-03-31 22:15:51,126 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:15:51,463 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:15:51,464 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label14.c [2023-03-31 22:15:51,483 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5a96dcba/9301cc586e03442685d02a81796d5388/FLAGb7300f95a [2023-03-31 22:15:51,499 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5a96dcba/9301cc586e03442685d02a81796d5388 [2023-03-31 22:15:51,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:15:51,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:15:51,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:15:51,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:15:51,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:15:51,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:15:51" (1/1) ... [2023-03-31 22:15:51,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1dfe8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:51, skipping insertion in model container [2023-03-31 22:15:51,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:15:51" (1/1) ... [2023-03-31 22:15:51,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:15:51,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:15:51,772 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/Problem16_label14.c[2092,2105] [2023-03-31 22:15:52,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:15:52,222 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:15:52,236 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/Problem16_label14.c[2092,2105] [2023-03-31 22:15:52,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:15:52,401 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:15:52,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52 WrapperNode [2023-03-31 22:15:52,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:15:52,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:15:52,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:15:52,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:15:52,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52" (1/1) ... [2023-03-31 22:15:52,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52" (1/1) ... [2023-03-31 22:15:52,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52" (1/1) ... [2023-03-31 22:15:52,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52" (1/1) ... [2023-03-31 22:15:52,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52" (1/1) ... [2023-03-31 22:15:52,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52" (1/1) ... [2023-03-31 22:15:52,562 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52" (1/1) ... [2023-03-31 22:15:52,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52" (1/1) ... [2023-03-31 22:15:52,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:15:52,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:15:52,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:15:52,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:15:52,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52" (1/1) ... [2023-03-31 22:15:52,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:15:52,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:15:52,618 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) [2023-03-31 22:15:52,640 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 [2023-03-31 22:15:52,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:15:52,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:15:52,656 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:15:52,656 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:15:52,657 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:15:52,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:15:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:15:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:15:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:15:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:15:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:15:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:15:52,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:15:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:15:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:15:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:15:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:15:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:15:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:15:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:15:52,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:15:52,761 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:15:52,762 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:15:54,582 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:15:55,559 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:15:55,559 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:15:55,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:15:55 BoogieIcfgContainer [2023-03-31 22:15:55,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:15:55,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:15:55,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:15:55,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:15:55,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:15:51" (1/3) ... [2023-03-31 22:15:55,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ddffdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:15:55, skipping insertion in model container [2023-03-31 22:15:55,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:15:52" (2/3) ... [2023-03-31 22:15:55,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ddffdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:15:55, skipping insertion in model container [2023-03-31 22:15:55,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:15:55" (3/3) ... [2023-03-31 22:15:55,572 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label14.c [2023-03-31 22:15:55,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:15:55,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:15:55,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:15:55,654 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;@286c1f62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:15:55,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:15:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:15:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:15:55,667 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:15:55,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:15:55,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:15:55,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:15:55,674 INFO L85 PathProgramCache]: Analyzing trace with hash -706740378, now seen corresponding path program 1 times [2023-03-31 22:15:55,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:15:55,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871268537] [2023-03-31 22:15:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:15:55,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:15:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:15:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:15:55,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:15:55,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871268537] [2023-03-31 22:15:55,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871268537] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:15:55,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:15:55,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:15:55,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065096975] [2023-03-31 22:15:55,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:15:55,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:15:55,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:15:56,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:15:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:15:56,009 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-03-31 22:15:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:15:57,985 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:15:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:15:57,988 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 [2023-03-31 22:15:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:15:58,000 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:15:58,000 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:15:58,006 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 [2023-03-31 22:15:58,009 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:15:58,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 90 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-31 22:15:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:15:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 468. [2023-03-31 22:15:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 458 states have (on average 1.8384279475982532) internal successors, (842), 458 states have internal predecessors, (842), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:15:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 853 transitions. [2023-03-31 22:15:58,069 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 853 transitions. Word has length 11 [2023-03-31 22:15:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:15:58,069 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 853 transitions. [2023-03-31 22:15:58,070 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) [2023-03-31 22:15:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 853 transitions. [2023-03-31 22:15:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 22:15:58,071 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:15:58,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:15:58,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:15:58,072 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:15:58,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:15:58,072 INFO L85 PathProgramCache]: Analyzing trace with hash -692728816, now seen corresponding path program 1 times [2023-03-31 22:15:58,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:15:58,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294919701] [2023-03-31 22:15:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:15:58,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:15:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:15:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:15:58,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:15:58,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294919701] [2023-03-31 22:15:58,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294919701] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:15:58,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:15:58,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:15:58,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989109862] [2023-03-31 22:15:58,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:15:58,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:15:58,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:15:58,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:15:58,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:15:58,311 INFO L87 Difference]: Start difference. First operand 468 states and 853 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-03-31 22:15:59,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:15:59,723 INFO L93 Difference]: Finished difference Result 1410 states and 2605 transitions. [2023-03-31 22:15:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:15:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-03-31 22:15:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:15:59,732 INFO L225 Difference]: With dead ends: 1410 [2023-03-31 22:15:59,732 INFO L226 Difference]: Without dead ends: 947 [2023-03-31 22:15:59,734 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 [2023-03-31 22:15:59,735 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 889 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:15:59,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 43 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:15:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-03-31 22:15:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 924. [2023-03-31 22:15:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 906 states have (on average 1.7339955849889626) internal successors, (1571), 910 states have internal predecessors, (1571), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-03-31 22:15:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1604 transitions. [2023-03-31 22:15:59,841 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1604 transitions. Word has length 22 [2023-03-31 22:15:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:15:59,842 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1604 transitions. [2023-03-31 22:15:59,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-03-31 22:15:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1604 transitions. [2023-03-31 22:15:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:15:59,843 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:15:59,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:15:59,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:15:59,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:15:59,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:15:59,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1234291651, now seen corresponding path program 1 times [2023-03-31 22:15:59,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:15:59,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890041562] [2023-03-31 22:15:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:15:59,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:15:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:15:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:15:59,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:15:59,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890041562] [2023-03-31 22:15:59,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890041562] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:15:59,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:15:59,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:15:59,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303169177] [2023-03-31 22:15:59,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:15:59,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:15:59,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:15:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:15:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:15:59,973 INFO L87 Difference]: Start difference. First operand 924 states and 1604 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) [2023-03-31 22:16:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:01,312 INFO L93 Difference]: Finished difference Result 2556 states and 4514 transitions. [2023-03-31 22:16:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:16:01,312 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 [2023-03-31 22:16:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:01,320 INFO L225 Difference]: With dead ends: 2556 [2023-03-31 22:16:01,320 INFO L226 Difference]: Without dead ends: 1637 [2023-03-31 22:16:01,323 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 [2023-03-31 22:16:01,324 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 994 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:01,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:16:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2023-03-31 22:16:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1605. [2023-03-31 22:16:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1573 states have (on average 1.477431659249841) internal successors, (2324), 1583 states have internal predecessors, (2324), 11 states have call successors, (11), 11 states have call predecessors, (11), 20 states have return successors, (69), 10 states have call predecessors, (69), 10 states have call successors, (69) [2023-03-31 22:16:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2404 transitions. [2023-03-31 22:16:01,369 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2404 transitions. Word has length 23 [2023-03-31 22:16:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:01,369 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 2404 transitions. [2023-03-31 22:16:01,369 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) [2023-03-31 22:16:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2404 transitions. [2023-03-31 22:16:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-31 22:16:01,372 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:01,372 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:16:01,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:16:01,372 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:01,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:01,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1263389031, now seen corresponding path program 1 times [2023-03-31 22:16:01,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:01,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474312953] [2023-03-31 22:16:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:01,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:16:01,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:01,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474312953] [2023-03-31 22:16:01,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474312953] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:16:01,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017308095] [2023-03-31 22:16:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:01,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:16:01,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:16:01,685 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) [2023-03-31 22:16:01,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:16:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:01,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:16:01,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:16:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:16:01,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:16:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017308095] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:16:01,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:16:01,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 22:16:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542395807] [2023-03-31 22:16:01,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:16:01,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:16:01,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:01,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:16:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:16:01,901 INFO L87 Difference]: Start difference. First operand 1605 states and 2404 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-03-31 22:16:02,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:02,848 INFO L93 Difference]: Finished difference Result 3436 states and 5156 transitions. [2023-03-31 22:16:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:16:02,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 92 [2023-03-31 22:16:02,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:02,861 INFO L225 Difference]: With dead ends: 3436 [2023-03-31 22:16:02,861 INFO L226 Difference]: Without dead ends: 1836 [2023-03-31 22:16:02,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:16:02,870 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 237 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:02,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 423 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 22:16:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2023-03-31 22:16:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1830. [2023-03-31 22:16:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1796 states have (on average 1.4387527839643652) internal successors, (2584), 1806 states have internal predecessors, (2584), 12 states have call successors, (12), 12 states have call predecessors, (12), 21 states have return successors, (81), 11 states have call predecessors, (81), 11 states have call successors, (81) [2023-03-31 22:16:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2677 transitions. [2023-03-31 22:16:02,931 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2677 transitions. Word has length 92 [2023-03-31 22:16:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:02,934 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 2677 transitions. [2023-03-31 22:16:02,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-03-31 22:16:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2677 transitions. [2023-03-31 22:16:02,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-03-31 22:16:02,942 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:02,942 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:16:02,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:16:03,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:16:03,161 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:03,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1900512739, now seen corresponding path program 1 times [2023-03-31 22:16:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:03,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442786023] [2023-03-31 22:16:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:16:03,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:03,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442786023] [2023-03-31 22:16:03,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442786023] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:16:03,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:16:03,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:16:03,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411930437] [2023-03-31 22:16:03,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:16:03,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:16:03,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:03,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:16:03,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:16:03,524 INFO L87 Difference]: Start difference. First operand 1830 states and 2677 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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) [2023-03-31 22:16:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:04,934 INFO L93 Difference]: Finished difference Result 4851 states and 7168 transitions. [2023-03-31 22:16:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:16:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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 135 [2023-03-31 22:16:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:04,953 INFO L225 Difference]: With dead ends: 4851 [2023-03-31 22:16:04,954 INFO L226 Difference]: Without dead ends: 3026 [2023-03-31 22:16:04,957 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 [2023-03-31 22:16:04,959 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 570 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:04,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 43 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:16:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2023-03-31 22:16:05,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2976. [2023-03-31 22:16:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2911 states have (on average 1.389556853315012) internal successors, (4045), 2942 states have internal predecessors, (4045), 17 states have call successors, (17), 17 states have call predecessors, (17), 47 states have return successors, (229), 16 states have call predecessors, (229), 16 states have call successors, (229) [2023-03-31 22:16:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4291 transitions. [2023-03-31 22:16:05,068 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4291 transitions. Word has length 135 [2023-03-31 22:16:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:05,069 INFO L495 AbstractCegarLoop]: Abstraction has 2976 states and 4291 transitions. [2023-03-31 22:16:05,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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) [2023-03-31 22:16:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4291 transitions. [2023-03-31 22:16:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-03-31 22:16:05,074 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:05,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 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] [2023-03-31 22:16:05,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:16:05,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:05,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1899219084, now seen corresponding path program 1 times [2023-03-31 22:16:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:05,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170646139] [2023-03-31 22:16:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:05,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:16:05,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170646139] [2023-03-31 22:16:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170646139] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:16:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387697294] [2023-03-31 22:16:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:16:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:16:05,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:16:05,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:16:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:05,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:16:05,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:16:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:16:05,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:16:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:16:05,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387697294] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:16:05,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132557541] [2023-03-31 22:16:05,847 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:16:05,847 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:16:05,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:16:05,853 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:16:05,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:16:05,968 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:16:06,065 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-03-31 22:16:06,160 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2023-03-31 22:16:07,251 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 49 for LOIs [2023-03-31 22:16:07,288 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-03-31 22:16:07,860 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2023-03-31 22:16:09,463 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 38423 conjuctions. This might take some time... [2023-03-31 22:16:11,576 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 473 conjuctions.