/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:17:48,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:17:48,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:17:48,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:17:48,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:17:48,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:17:48,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:17:48,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:17:48,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:17:48,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:17:48,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:17:48,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:17:48,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:17:48,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:17:48,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:17:48,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:17:48,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:17:48,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:17:48,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:17:48,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:17:48,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:17:48,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:17:48,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:17:48,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:17:48,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:17:48,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:17:48,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:17:48,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:17:48,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:17:48,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:17:48,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:17:48,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:17:48,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:17:48,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:17:48,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:17:48,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:17:48,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:17:48,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:17:48,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:17:48,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:17:48,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:17:48,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:17:48,647 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:17:48,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:17:48,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:17:48,647 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:17:48,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:17:48,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:17:48,648 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:17:48,648 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:17:48,648 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:17:48,648 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:17:48,651 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:17:48,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:17:48,651 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:17:48,651 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:17:48,652 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:17:48,652 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:17:48,652 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:17:48,652 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:17:48,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:17:48,653 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:17:48,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:17:48,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:17:48,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:17:48,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:17:48,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:17:48,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:17:48,654 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:17:48,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:17:48,654 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:17:48,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:17:48,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:17:48,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:17:48,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:17:48,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:17:48,655 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:17:48,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:17:48,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:17:48,656 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:17:48,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:17:48,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:17:48,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:17:48,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:17:48,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:17:48,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:17:48,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:17:48,857 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:17:48,857 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:17:48,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label40.c [2023-04-01 10:17:49,854 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:17:50,098 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:17:50,099 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label40.c [2023-04-01 10:17:50,113 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8691c78a/432e596b9a074faea7c0838ab006f5cf/FLAGe3e00f58a [2023-04-01 10:17:50,126 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8691c78a/432e596b9a074faea7c0838ab006f5cf [2023-04-01 10:17:50,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:17:50,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:17:50,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:17:50,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:17:50,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:17:50,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6816c6be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50, skipping insertion in model container [2023-04-01 10:17:50,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:17:50,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:17:50,315 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/Problem15_label40.c[3333,3346] [2023-04-01 10:17:50,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:17:50,612 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:17:50,631 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/Problem15_label40.c[3333,3346] [2023-04-01 10:17:50,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:17:50,785 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:17:50,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50 WrapperNode [2023-04-01 10:17:50,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:17:50,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:17:50,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:17:50,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:17:50,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,892 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:17:50,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:17:50,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:17:50,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:17:50,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50" (1/1) ... [2023-04-01 10:17:50,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:17:50,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:17:50,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:17:50,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:17:50,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:17:50,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:17:50,970 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:17:50,971 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:17:50,971 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:17:50,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:17:50,971 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:17:50,971 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:17:50,971 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:17:50,971 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:17:50,971 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:17:50,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:17:50,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:17:50,971 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:17:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:17:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:17:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:17:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:17:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:17:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:17:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:17:51,037 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:17:51,039 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:17:52,819 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:17:53,252 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:17:53,252 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:17:53,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:17:53 BoogieIcfgContainer [2023-04-01 10:17:53,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:17:53,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:17:53,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:17:53,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:17:53,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:17:50" (1/3) ... [2023-04-01 10:17:53,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73fd7c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:17:53, skipping insertion in model container [2023-04-01 10:17:53,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:50" (2/3) ... [2023-04-01 10:17:53,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73fd7c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:17:53, skipping insertion in model container [2023-04-01 10:17:53,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:17:53" (3/3) ... [2023-04-01 10:17:53,262 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label40.c [2023-04-01 10:17:53,274 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:17:53,274 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:17:53,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:17:53,326 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;@6fb4a15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:17:53,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:17:53,331 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) [2023-04-01 10:17:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:17:53,336 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:53,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:53,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:53,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:53,341 INFO L85 PathProgramCache]: Analyzing trace with hash 468028324, now seen corresponding path program 1 times [2023-04-01 10:17:53,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:53,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462599939] [2023-04-01 10:17:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:53,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:53,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:53,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462599939] [2023-04-01 10:17:53,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462599939] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:53,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:53,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:53,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928170023] [2023-04-01 10:17:53,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:53,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:53,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:53,642 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) [2023-04-01 10:17:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:55,219 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:17:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:55,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:17:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:55,233 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:17:55,234 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:17:55,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:55,240 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:55,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 10:17:55,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:17:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 10:17:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 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) [2023-04-01 10:17:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-04-01 10:17:55,293 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-04-01 10:17:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:55,294 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-04-01 10:17:55,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:17:55,295 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-04-01 10:17:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:17:55,296 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:55,297 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 10:17:55,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:17:55,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:55,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1271921146, now seen corresponding path program 1 times [2023-04-01 10:17:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:55,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782892008] [2023-04-01 10:17:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:55,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:55,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:55,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782892008] [2023-04-01 10:17:55,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782892008] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:55,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:55,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:55,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185577921] [2023-04-01 10:17:55,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:55,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:55,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:55,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:55,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:55,505 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 10:17:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:56,750 INFO L93 Difference]: Finished difference Result 1164 states and 1942 transitions. [2023-04-01 10:17:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:56,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 21 [2023-04-01 10:17:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:56,754 INFO L225 Difference]: With dead ends: 1164 [2023-04-01 10:17:56,754 INFO L226 Difference]: Without dead ends: 700 [2023-04-01 10:17:56,755 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 10:17:56,756 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 253 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:56,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 355 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 10:17:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2023-04-01 10:17:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 697. [2023-04-01 10:17:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 685 states have (on average 1.5532846715328468) internal successors, (1064), 685 states have internal predecessors, (1064), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 10:17:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1081 transitions. [2023-04-01 10:17:56,778 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1081 transitions. Word has length 21 [2023-04-01 10:17:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:56,778 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 1081 transitions. [2023-04-01 10:17:56,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 10:17:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1081 transitions. [2023-04-01 10:17:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 10:17:56,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:56,779 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:56,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:17:56,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:56,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:56,780 INFO L85 PathProgramCache]: Analyzing trace with hash 557454127, now seen corresponding path program 1 times [2023-04-01 10:17:56,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:56,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028665852] [2023-04-01 10:17:56,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:56,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 10:17:56,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:56,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028665852] [2023-04-01 10:17:56,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028665852] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:17:56,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143646775] [2023-04-01 10:17:56,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:56,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:17:56,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:17:56,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:17:56,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:17:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:57,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 10:17:57,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:17:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 10:17:57,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:17:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 10:17:57,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143646775] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:17:57,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:17:57,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-04-01 10:17:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767411664] [2023-04-01 10:17:57,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:57,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:17:57,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:17:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:17:57,260 INFO L87 Difference]: Start difference. First operand 697 states and 1081 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:17:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:58,891 INFO L93 Difference]: Finished difference Result 1863 states and 2972 transitions. [2023-04-01 10:17:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:17:58,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-04-01 10:17:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:58,895 INFO L225 Difference]: With dead ends: 1863 [2023-04-01 10:17:58,896 INFO L226 Difference]: Without dead ends: 1171 [2023-04-01 10:17:58,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:17:58,898 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 832 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:58,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 37 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 10:17:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-04-01 10:17:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2023-04-01 10:17:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1144 states have (on average 1.3776223776223777) internal successors, (1576), 1149 states have internal predecessors, (1576), 9 states have call successors, (9), 9 states have call predecessors, (9), 13 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2023-04-01 10:17:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1612 transitions. [2023-04-01 10:17:58,923 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1612 transitions. Word has length 34 [2023-04-01 10:17:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:58,923 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1612 transitions. [2023-04-01 10:17:58,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:17:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1612 transitions. [2023-04-01 10:17:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 10:17:58,924 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:58,924 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] [2023-04-01 10:17:58,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:17:59,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:17:59,129 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:59,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1462685185, now seen corresponding path program 1 times [2023-04-01 10:17:59,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:59,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941871090] [2023-04-01 10:17:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:59,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:17:59,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:59,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941871090] [2023-04-01 10:17:59,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941871090] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:59,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:59,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:17:59,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126313995] [2023-04-01 10:17:59,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:59,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:17:59,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:17:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:17:59,226 INFO L87 Difference]: Start difference. First operand 1167 states and 1612 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:18:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:18:01,182 INFO L93 Difference]: Finished difference Result 3562 states and 4991 transitions. [2023-04-01 10:18:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:18:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 37 [2023-04-01 10:18:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:18:01,192 INFO L225 Difference]: With dead ends: 3562 [2023-04-01 10:18:01,192 INFO L226 Difference]: Without dead ends: 2400 [2023-04-01 10:18:01,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:18:01,195 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 697 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:18:01,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 53 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 10:18:01,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2023-04-01 10:18:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2354. [2023-04-01 10:18:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2297 states have (on average 1.235959947757945) internal successors, (2839), 2322 states have internal predecessors, (2839), 16 states have call successors, (16), 16 states have call predecessors, (16), 40 states have return successors, (103), 15 states have call predecessors, (103), 15 states have call successors, (103) [2023-04-01 10:18:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 2958 transitions. [2023-04-01 10:18:01,259 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 2958 transitions. Word has length 37 [2023-04-01 10:18:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:18:01,260 INFO L495 AbstractCegarLoop]: Abstraction has 2354 states and 2958 transitions. [2023-04-01 10:18:01,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:18:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 2958 transitions. [2023-04-01 10:18:01,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-04-01 10:18:01,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:18:01,271 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:18:01,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:18:01,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:18:01,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:18:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2020319309, now seen corresponding path program 1 times [2023-04-01 10:18:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:18:01,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028488443] [2023-04-01 10:18:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:18:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:18:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:18:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:18:01,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:18:01,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028488443] [2023-04-01 10:18:01,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028488443] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:18:01,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960412862] [2023-04-01 10:18:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:18:01,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:18:01,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:18:01,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:18:01,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:18:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:18:01,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:18:01,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:18:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:18:01,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:18:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:18:01,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960412862] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:18:01,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1178609846] [2023-04-01 10:18:01,882 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 10:18:01,882 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:18:01,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:18:01,889 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:18:01,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:18:02,118 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:18:02,384 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2023-04-01 10:18:09,147 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 41