/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:19:06,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:19:06,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:19:06,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:19:06,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:19:06,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:19:06,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:19:06,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:19:06,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:19:06,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:19:06,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:19:06,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:19:06,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:19:06,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:19:06,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:19:06,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:19:06,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:19:06,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:19:06,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:19:06,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:19:06,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:19:06,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:19:06,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:19:06,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:19:06,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:19:06,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:19:06,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:19:06,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:19:06,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:19:06,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:19:06,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:19:06,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:19:06,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:19:06,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:19:06,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:19:06,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:19:06,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:19:06,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:19:06,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:19:06,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:19:06,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:19:06,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:19:06,869 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:19:06,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:19:06,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:19:06,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:19:06,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:19:06,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:19:06,871 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:19:06,872 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:19:06,872 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:19:06,872 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:19:06,873 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:19:06,873 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:19:06,873 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:19:06,873 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:19:06,873 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:19:06,873 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:19:06,873 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:19:06,873 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:19:06,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:19:06,874 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:19:06,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:19:06,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:19:06,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:19:06,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:19:06,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:19:06,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:19:06,875 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:19:06,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:19:06,875 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:19:06,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:19:06,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:19:06,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:19:06,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:19:06,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:19:06,876 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:19:06,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:19:06,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:19:06,877 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:19:06,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:19:06,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:19:06,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:19:06,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:19:07,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:19:07,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:19:07,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:19:07,148 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:19:07,148 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:19:07,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label36.c [2023-04-01 04:19:08,381 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:19:08,737 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:19:08,738 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label36.c [2023-04-01 04:19:08,755 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f02a503d0/21d0f5341e144d0d8848ea75552f0c7d/FLAG003dcf4d5 [2023-04-01 04:19:08,774 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f02a503d0/21d0f5341e144d0d8848ea75552f0c7d [2023-04-01 04:19:08,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:19:08,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:19:08,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:19:08,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:19:08,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:19:08,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:19:08" (1/1) ... [2023-04-01 04:19:08,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db0be19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:08, skipping insertion in model container [2023-04-01 04:19:08,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:19:08" (1/1) ... [2023-04-01 04:19:08,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:19:08,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:19:09,035 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_label36.c[3906,3919] [2023-04-01 04:19:09,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:19:09,365 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:19:09,395 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_label36.c[3906,3919] [2023-04-01 04:19:09,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:19:09,617 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:19:09,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09 WrapperNode [2023-04-01 04:19:09,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:19:09,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:19:09,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:19:09,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:19:09,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09" (1/1) ... [2023-04-01 04:19:09,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09" (1/1) ... [2023-04-01 04:19:09,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09" (1/1) ... [2023-04-01 04:19:09,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09" (1/1) ... [2023-04-01 04:19:09,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09" (1/1) ... [2023-04-01 04:19:09,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09" (1/1) ... [2023-04-01 04:19:09,744 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09" (1/1) ... [2023-04-01 04:19:09,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09" (1/1) ... [2023-04-01 04:19:09,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:19:09,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:19:09,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:19:09,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:19:09,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09" (1/1) ... [2023-04-01 04:19:09,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:19:09,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:19:09,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:19:09,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:19:09,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:19:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:19:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:19:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:19:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:19:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:19:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:19:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:19:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:19:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:19:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:19:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:19:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:19:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:19:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:19:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:19:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:19:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:19:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:19:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:19:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:19:09,898 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:19:09,900 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:19:11,762 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:19:12,761 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:19:12,761 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:19:12,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:19:12 BoogieIcfgContainer [2023-04-01 04:19:12,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:19:12,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:19:12,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:19:12,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:19:12,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:19:08" (1/3) ... [2023-04-01 04:19:12,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4657d4fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:19:12, skipping insertion in model container [2023-04-01 04:19:12,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:19:09" (2/3) ... [2023-04-01 04:19:12,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4657d4fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:19:12, skipping insertion in model container [2023-04-01 04:19:12,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:19:12" (3/3) ... [2023-04-01 04:19:12,771 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label36.c [2023-04-01 04:19:12,786 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:19:12,786 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:19:12,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:19:12,837 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;@4f827813, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:19:12,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:19:12,842 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 04:19:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:19:12,848 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:12,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:19:12,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:12,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:12,853 INFO L85 PathProgramCache]: Analyzing trace with hash -706735770, now seen corresponding path program 1 times [2023-04-01 04:19:12,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:12,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193856412] [2023-04-01 04:19:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:12,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:19:13,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:13,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193856412] [2023-04-01 04:19:13,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193856412] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:13,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:19:13,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:19:13,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855658405] [2023-04-01 04:19:13,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:13,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:19:13,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:13,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:19:13,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:19:13,161 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 04:19:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:14,385 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:19:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:19:14,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:19:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:14,402 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:19:14,402 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:19:14,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:19:14,412 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:14,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 74 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 04:19:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:19:14,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2023-04-01 04:19:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 457 states have (on average 1.87308533916849) internal successors, (856), 457 states have internal predecessors, (856), 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 04:19:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 867 transitions. [2023-04-01 04:19:14,471 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 867 transitions. Word has length 11 [2023-04-01 04:19:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:14,472 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 867 transitions. [2023-04-01 04:19:14,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:19:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 867 transitions. [2023-04-01 04:19:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 04:19:14,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:14,474 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] [2023-04-01 04:19:14,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:19:14,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:14,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:14,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1212752939, now seen corresponding path program 1 times [2023-04-01 04:19:14,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:14,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028041126] [2023-04-01 04:19:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:14,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:19:14,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:14,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028041126] [2023-04-01 04:19:14,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028041126] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:14,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:19:14,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:19:14,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269462705] [2023-04-01 04:19:14,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:14,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:19:14,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:14,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:19:14,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:19:14,824 INFO L87 Difference]: Start difference. First operand 467 states and 867 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:19:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:16,121 INFO L93 Difference]: Finished difference Result 1405 states and 2628 transitions. [2023-04-01 04:19:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:19:16,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 59 [2023-04-01 04:19:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:16,131 INFO L225 Difference]: With dead ends: 1405 [2023-04-01 04:19:16,131 INFO L226 Difference]: Without dead ends: 943 [2023-04-01 04:19:16,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:19:16,135 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 922 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 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 [2023-04-01 04:19:16,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 04:19:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-04-01 04:19:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 714. [2023-04-01 04:19:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 695 states have (on average 1.720863309352518) internal successors, (1196), 698 states have internal predecessors, (1196), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-04-01 04:19:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1225 transitions. [2023-04-01 04:19:16,172 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1225 transitions. Word has length 59 [2023-04-01 04:19:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:16,173 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 1225 transitions. [2023-04-01 04:19:16,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:19:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1225 transitions. [2023-04-01 04:19:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 04:19:16,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:16,177 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 04:19:16,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:19:16,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:16,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:16,178 INFO L85 PathProgramCache]: Analyzing trace with hash -929595552, now seen corresponding path program 1 times [2023-04-01 04:19:16,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:16,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305938892] [2023-04-01 04:19:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:16,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:19:16,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:16,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305938892] [2023-04-01 04:19:16,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305938892] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:19:16,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078433613] [2023-04-01 04:19:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:16,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:19:16,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:19:16,645 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:19:16,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:19:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:16,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:19:16,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:19:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:19:16,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:19:16,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078433613] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:16,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:19:16,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:19:16,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687710665] [2023-04-01 04:19:16,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:16,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:19:16,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:19:16,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:19:16,954 INFO L87 Difference]: Start difference. First operand 714 states and 1225 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:19:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:18,466 INFO L93 Difference]: Finished difference Result 1907 states and 3294 transitions. [2023-04-01 04:19:18,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:19:18,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 115 [2023-04-01 04:19:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:18,474 INFO L225 Difference]: With dead ends: 1907 [2023-04-01 04:19:18,474 INFO L226 Difference]: Without dead ends: 1198 [2023-04-01 04:19:18,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:19:18,479 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 799 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:18,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 46 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:19:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2023-04-01 04:19:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1176. [2023-04-01 04:19:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1148 states have (on average 1.5609756097560976) internal successors, (1792), 1154 states have internal predecessors, (1792), 11 states have call successors, (11), 11 states have call predecessors, (11), 16 states have return successors, (50), 10 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 04:19:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1853 transitions. [2023-04-01 04:19:18,527 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1853 transitions. Word has length 115 [2023-04-01 04:19:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:18,529 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1853 transitions. [2023-04-01 04:19:18,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:19:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1853 transitions. [2023-04-01 04:19:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-04-01 04:19:18,543 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:18,544 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 04:19:18,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:19:18,752 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 04:19:18,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:18,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:18,753 INFO L85 PathProgramCache]: Analyzing trace with hash -60146983, now seen corresponding path program 1 times [2023-04-01 04:19:18,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:18,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860063700] [2023-04-01 04:19:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:18,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-04-01 04:19:19,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:19,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860063700] [2023-04-01 04:19:19,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860063700] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:19:19,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429372284] [2023-04-01 04:19:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:19,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:19:19,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:19:19,034 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 04:19:19,037 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 04:19:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:19,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:19:19,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:19:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:19:19,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:19:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-04-01 04:19:19,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429372284] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:19:19,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534523829] [2023-04-01 04:19:19,525 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-01 04:19:19,525 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:19:19,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:19:19,532 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:19:19,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:19:19,692 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 04:19:19,866 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2023-04-01 04:19:22,265 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 85830 conjuctions. This might take some time... [2023-04-01 04:19:31,619 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1406 conjuctions. [2023-04-01 04:19:51,818 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 31