/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/Problem12_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:18:37,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:18:37,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:18:37,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:18:37,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:18:37,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:18:37,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:18:37,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:18:37,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:18:37,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:18:37,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:18:37,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:18:37,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:18:37,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:18:37,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:18:37,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:18:37,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:18:37,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:18:37,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:18:37,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:18:37,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:18:37,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:18:37,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:18:37,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:18:37,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:18:37,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:18:37,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:18:37,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:18:37,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:18:37,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:18:37,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:18:37,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:18:37,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:18:37,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:18:37,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:18:37,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:18:37,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:18:37,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:18:37,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:18:37,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:18:37,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:18:37,892 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 19:18:37,916 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:18:37,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:18:37,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:18:37,921 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:18:37,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:18:37,922 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:18:37,922 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:18:37,923 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:18:37,923 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:18:37,923 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:18:37,923 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:18:37,924 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:18:37,924 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:18:37,924 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:18:37,924 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:18:37,924 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:18:37,924 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:18:37,924 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:18:37,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:18:37,925 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:18:37,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:18:37,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:18:37,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:18:37,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:18:37,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:18:37,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:18:37,926 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:18:37,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:18:37,926 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:18:37,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:18:37,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:18:37,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:18:37,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:18:37,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:18:37,927 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:18:37,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:18:37,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:18:37,928 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:18:37,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:18:37,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:18:37,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:18:37,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:18:38,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:18:38,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:18:38,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:18:38,136 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:18:38,136 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:18:38,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label16.c [2023-04-02 19:18:39,435 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:18:39,848 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:18:39,848 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label16.c [2023-04-02 19:18:39,877 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6de45b39/3cafdcc0031e402eacab0637ced252e2/FLAGdea13e7c0 [2023-04-02 19:18:39,894 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6de45b39/3cafdcc0031e402eacab0637ced252e2 [2023-04-02 19:18:39,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:18:39,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:18:39,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:18:39,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:18:39,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:18:39,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:18:39" (1/1) ... [2023-04-02 19:18:39,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cfcaa22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:39, skipping insertion in model container [2023-04-02 19:18:39,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:18:39" (1/1) ... [2023-04-02 19:18:39,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:18:40,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:18:40,234 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/Problem12_label16.c[8006,8019] [2023-04-02 19:18:40,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:18:40,915 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:18:40,945 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/Problem12_label16.c[8006,8019] [2023-04-02 19:18:41,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:18:41,444 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:18:41,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41 WrapperNode [2023-04-02 19:18:41,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:18:41,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:18:41,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:18:41,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:18:41,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41" (1/1) ... [2023-04-02 19:18:41,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41" (1/1) ... [2023-04-02 19:18:41,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41" (1/1) ... [2023-04-02 19:18:41,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41" (1/1) ... [2023-04-02 19:18:41,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41" (1/1) ... [2023-04-02 19:18:41,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41" (1/1) ... [2023-04-02 19:18:41,658 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41" (1/1) ... [2023-04-02 19:18:41,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41" (1/1) ... [2023-04-02 19:18:41,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:18:41,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:18:41,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:18:41,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:18:41,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41" (1/1) ... [2023-04-02 19:18:41,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:18:41,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:18:41,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 19:18:41,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 19:18:41,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:18:41,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:18:41,780 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:18:41,780 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:18:41,780 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:18:41,781 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:18:41,781 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:18:41,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:18:41,781 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:18:41,781 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:18:41,781 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:18:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:18:41,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:18:41,846 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:18:41,848 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:18:45,338 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:18:45,919 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:18:45,920 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:18:45,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:18:45 BoogieIcfgContainer [2023-04-02 19:18:45,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:18:45,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:18:45,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:18:45,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:18:45,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:18:39" (1/3) ... [2023-04-02 19:18:45,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a6cd49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:18:45, skipping insertion in model container [2023-04-02 19:18:45,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:18:41" (2/3) ... [2023-04-02 19:18:45,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a6cd49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:18:45, skipping insertion in model container [2023-04-02 19:18:45,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:18:45" (3/3) ... [2023-04-02 19:18:45,931 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label16.c [2023-04-02 19:18:45,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:18:45,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:18:46,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:18:46,021 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;@6583c9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:18:46,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:18:46,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 19:18:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:18:46,035 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:18:46,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:18:46,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:18:46,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:18:46,041 INFO L85 PathProgramCache]: Analyzing trace with hash 636351556, now seen corresponding path program 1 times [2023-04-02 19:18:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:18:46,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82457627] [2023-04-02 19:18:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:18:46,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:18:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:18:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:18:46,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:18:46,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82457627] [2023-04-02 19:18:46,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82457627] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:18:46,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:18:46,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:18:46,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372054925] [2023-04-02 19:18:46,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:18:46,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:18:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:18:46,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:18:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:18:46,410 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 19:18:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:18:49,579 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:18:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:18:49,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 19:18:49,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:18:49,604 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:18:49,604 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:18:49,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:18:49,613 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 738 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 19:18:49,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 112 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 19:18:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:18:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-02 19:18:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.9348148148148148) internal successors, (2612), 1350 states have internal predecessors, (2612), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-02 19:18:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2635 transitions. [2023-04-02 19:18:49,730 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2635 transitions. Word has length 11 [2023-04-02 19:18:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:18:49,730 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2635 transitions. [2023-04-02 19:18:49,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 19:18:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2635 transitions. [2023-04-02 19:18:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 19:18:49,732 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:18:49,732 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:18:49,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:18:49,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:18:49,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:18:49,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1094892496, now seen corresponding path program 1 times [2023-04-02 19:18:49,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:18:49,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457417867] [2023-04-02 19:18:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:18:49,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:18:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:18:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:18:49,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:18:49,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457417867] [2023-04-02 19:18:49,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457417867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:18:49,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:18:49,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:18:49,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644410983] [2023-04-02 19:18:49,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:18:49,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:18:49,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:18:49,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:18:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:18:49,910 INFO L87 Difference]: Start difference. First operand 1368 states and 2635 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:18:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:18:53,968 INFO L93 Difference]: Finished difference Result 4148 states and 8004 transitions. [2023-04-02 19:18:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:18:53,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-04-02 19:18:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:18:53,983 INFO L225 Difference]: With dead ends: 4148 [2023-04-02 19:18:53,983 INFO L226 Difference]: Without dead ends: 2785 [2023-04-02 19:18:53,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:18:53,987 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2807 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2807 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-02 19:18:53,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2807 Valid, 101 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-02 19:18:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-02 19:18:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755. [2023-04-02 19:18:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2713 states have (on average 1.6973829708809436) internal successors, (4605), 2717 states have internal predecessors, (4605), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-02 19:18:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4682 transitions. [2023-04-02 19:18:54,088 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4682 transitions. Word has length 29 [2023-04-02 19:18:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:18:54,089 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4682 transitions. [2023-04-02 19:18:54,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:18:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4682 transitions. [2023-04-02 19:18:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 19:18:54,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:18:54,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:18:54,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:18:54,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:18:54,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:18:54,091 INFO L85 PathProgramCache]: Analyzing trace with hash -916297820, now seen corresponding path program 1 times [2023-04-02 19:18:54,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:18:54,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985339466] [2023-04-02 19:18:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:18:54,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:18:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:18:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:18:54,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:18:54,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985339466] [2023-04-02 19:18:54,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985339466] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:18:54,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155510074] [2023-04-02 19:18:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:18:54,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:18:54,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:18:54,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 19:18:54,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 19:18:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:18:54,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:18:54,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:18:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:18:54,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:18:54,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155510074] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:18:54,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:18:54,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:18:54,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900049664] [2023-04-02 19:18:54,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:18:54,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:18:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:18:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:18:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:18:54,488 INFO L87 Difference]: Start difference. First operand 2755 states and 4682 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:18:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:18:58,400 INFO L93 Difference]: Finished difference Result 8445 states and 14563 transitions. [2023-04-02 19:18:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:18:58,405 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-04-02 19:18:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:18:58,433 INFO L225 Difference]: With dead ends: 8445 [2023-04-02 19:18:58,434 INFO L226 Difference]: Without dead ends: 5695 [2023-04-02 19:18:58,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-02 19:18:58,442 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2314 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4335 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 4335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:18:58,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2314 Valid, 95 Invalid, 5310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 4335 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-02 19:18:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2023-04-02 19:18:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5583. [2023-04-02 19:18:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5460 states have (on average 1.491941391941392) internal successors, (8146), 5483 states have internal predecessors, (8146), 27 states have call successors, (27), 27 states have call predecessors, (27), 95 states have return successors, (350), 72 states have call predecessors, (350), 26 states have call successors, (350) [2023-04-02 19:18:58,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8523 transitions. [2023-04-02 19:18:58,610 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 8523 transitions. Word has length 43 [2023-04-02 19:18:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:18:58,610 INFO L495 AbstractCegarLoop]: Abstraction has 5583 states and 8523 transitions. [2023-04-02 19:18:58,610 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:18:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 8523 transitions. [2023-04-02 19:18:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 19:18:58,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:18:58,615 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] [2023-04-02 19:18:58,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 19:18:58,821 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 [2023-04-02 19:18:58,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:18:58,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:18:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash -119039697, now seen corresponding path program 1 times [2023-04-02 19:18:58,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:18:58,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250227253] [2023-04-02 19:18:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:18:58,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:18:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:18:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:18:59,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:18:59,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250227253] [2023-04-02 19:18:59,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250227253] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:18:59,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:18:59,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:18:59,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892708902] [2023-04-02 19:18:59,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:18:59,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:18:59,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:18:59,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:18:59,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:18:59,069 INFO L87 Difference]: Start difference. First operand 5583 states and 8523 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:19:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:19:02,972 INFO L93 Difference]: Finished difference Result 17084 states and 27298 transitions. [2023-04-02 19:19:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:19:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 42 [2023-04-02 19:19:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:19:03,030 INFO L225 Difference]: With dead ends: 17084 [2023-04-02 19:19:03,030 INFO L226 Difference]: Without dead ends: 11506 [2023-04-02 19:19:03,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 19:19:03,055 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2079 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4739 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 4739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:19:03,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 102 Invalid, 5448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 4739 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-02 19:19:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11506 states. [2023-04-02 19:19:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11506 to 11063. [2023-04-02 19:19:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11063 states, 10731 states have (on average 1.3301649426894044) internal successors, (14274), 10821 states have internal predecessors, (14274), 51 states have call successors, (51), 51 states have call predecessors, (51), 280 states have return successors, (1406), 190 states have call predecessors, (1406), 50 states have call successors, (1406) [2023-04-02 19:19:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 15731 transitions. [2023-04-02 19:19:03,422 INFO L78 Accepts]: Start accepts. Automaton has 11063 states and 15731 transitions. Word has length 42 [2023-04-02 19:19:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:19:03,423 INFO L495 AbstractCegarLoop]: Abstraction has 11063 states and 15731 transitions. [2023-04-02 19:19:03,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:19:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 11063 states and 15731 transitions. [2023-04-02 19:19:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 19:19:03,429 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:19:03,429 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-02 19:19:03,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 19:19:03,429 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:19:03,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:19:03,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1973286035, now seen corresponding path program 1 times [2023-04-02 19:19:03,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:19:03,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870378469] [2023-04-02 19:19:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:19:03,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:19:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:19:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:19:03,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:19:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870378469] [2023-04-02 19:19:03,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870378469] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:19:03,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007562318] [2023-04-02 19:19:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:19:03,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:19:03,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:19:03,717 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) [2023-04-02 19:19:03,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 19:19:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:19:03,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:19:03,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:19:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:19:03,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:19:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007562318] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:19:03,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:19:03,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:19:03,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102493246] [2023-04-02 19:19:03,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:19:03,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:19:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:19:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:19:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:19:03,955 INFO L87 Difference]: Start difference. First operand 11063 states and 15731 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-04-02 19:19:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:19:07,658 INFO L93 Difference]: Finished difference Result 28698 states and 43618 transitions. [2023-04-02 19:19:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:19:07,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 80 [2023-04-02 19:19:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:19:07,733 INFO L225 Difference]: With dead ends: 28698 [2023-04-02 19:19:07,733 INFO L226 Difference]: Without dead ends: 17640 [2023-04-02 19:19:07,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:19:07,760 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2068 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-02 19:19:07,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 86 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-02 19:19:07,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2023-04-02 19:19:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 16650. [2023-04-02 19:19:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16650 states, 16138 states have (on average 1.3326930226793903) internal successors, (21507), 16283 states have internal predecessors, (21507), 76 states have call successors, (76), 76 states have call predecessors, (76), 435 states have return successors, (3154), 290 states have call predecessors, (3154), 75 states have call successors, (3154) [2023-04-02 19:19:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 24737 transitions. [2023-04-02 19:19:08,171 INFO L78 Accepts]: Start accepts. Automaton has 16650 states and 24737 transitions. Word has length 80 [2023-04-02 19:19:08,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:19:08,173 INFO L495 AbstractCegarLoop]: Abstraction has 16650 states and 24737 transitions. [2023-04-02 19:19:08,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-04-02 19:19:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 16650 states and 24737 transitions. [2023-04-02 19:19:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-02 19:19:08,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:19:08,176 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-02 19:19:08,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 19:19:08,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:19:08,383 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:19:08,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:19:08,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1513765135, now seen corresponding path program 1 times [2023-04-02 19:19:08,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:19:08,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257894302] [2023-04-02 19:19:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:19:08,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:19:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:19:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 19:19:08,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:19:08,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257894302] [2023-04-02 19:19:08,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257894302] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:19:08,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611016160] [2023-04-02 19:19:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:19:08,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:19:08,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:19:08,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 19:19:08,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 19:19:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:19:08,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:19:08,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:19:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:19:08,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:19:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 19:19:09,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611016160] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:19:09,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599658077] [2023-04-02 19:19:09,046 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-02 19:19:09,047 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:19:09,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:19:09,053 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:19:09,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:19:09,221 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-02 19:19:09,471 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2023-04-02 19:19:18,586 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 97127 conjuctions. This might take some time... [2023-04-02 19:19:23,332 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 241 conjuctions. [2023-04-02 19:19:51,972 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 14196 conjuctions. This might take some time... [2023-04-02 19:20:01,273 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 14196 conjuctions.