/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/Problem18_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:25:54,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:25:54,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:25:54,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:25:54,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:25:54,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:25:54,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:25:54,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:25:54,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:25:54,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:25:54,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:25:54,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:25:54,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:25:54,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:25:54,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:25:54,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:25:54,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:25:54,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:25:54,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:25:54,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:25:54,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:25:54,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:25:54,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:25:54,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:25:54,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:25:54,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:25:54,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:25:54,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:25:54,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:25:54,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:25:54,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:25:54,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:25:54,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:25:54,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:25:54,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:25:54,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:25:54,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:25:54,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:25:54,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:25:54,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:25:54,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:25:54,948 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 04:25:54,970 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:25:54,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:25:54,970 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:25:54,970 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:25:54,971 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:25:54,971 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:25:54,971 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:25:54,971 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:25:54,971 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:25:54,971 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:25:54,972 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:25:54,972 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:25:54,972 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:25:54,972 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:25:54,972 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:25:54,972 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:25:54,972 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:25:54,979 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:25:54,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:25:54,980 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:25:54,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:25:54,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:25:54,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:25:54,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:25:54,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:25:54,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:25:54,982 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:25:54,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:25:54,982 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:25:54,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:25:54,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:25:54,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:25:54,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:25:54,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:25:54,983 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:25:54,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:25:54,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:25:54,984 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:25:54,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:25:54,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:25:54,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:25:54,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:25:55,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:25:55,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:25:55,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:25:55,255 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:25:55,255 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:25:55,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label11.c [2023-04-01 04:25:56,390 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:25:56,817 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:25:56,818 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label11.c [2023-04-01 04:25:56,840 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b146ec3fd/f212e3db4c29444da0062c9e03963141/FLAG393efca63 [2023-04-01 04:25:56,855 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b146ec3fd/f212e3db4c29444da0062c9e03963141 [2023-04-01 04:25:56,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:25:56,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:25:56,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:25:56,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:25:56,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:25:56,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:25:56" (1/1) ... [2023-04-01 04:25:56,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b84cad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:56, skipping insertion in model container [2023-04-01 04:25:56,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:25:56" (1/1) ... [2023-04-01 04:25:56,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:25:56,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:25:57,168 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/Problem18_label11.c[4550,4563] [2023-04-01 04:25:57,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:25:57,683 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:25:57,704 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/Problem18_label11.c[4550,4563] [2023-04-01 04:25:57,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:25:57,919 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:25:57,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57 WrapperNode [2023-04-01 04:25:57,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:25:57,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:25:57,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:25:57,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:25:57,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57" (1/1) ... [2023-04-01 04:25:57,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57" (1/1) ... [2023-04-01 04:25:57,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57" (1/1) ... [2023-04-01 04:25:57,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57" (1/1) ... [2023-04-01 04:25:58,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57" (1/1) ... [2023-04-01 04:25:58,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57" (1/1) ... [2023-04-01 04:25:58,094 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57" (1/1) ... [2023-04-01 04:25:58,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57" (1/1) ... [2023-04-01 04:25:58,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:25:58,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:25:58,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:25:58,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:25:58,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57" (1/1) ... [2023-04-01 04:25:58,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:25:58,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:25:58,145 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 04:25:58,154 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 04:25:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:25:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:25:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:25:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:25:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:25:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:25:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:25:58,235 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:25:58,235 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:25:58,235 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:25:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:25:58,298 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:25:58,300 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:26:00,685 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:26:07,843 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:26:07,843 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:26:07,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:26:07 BoogieIcfgContainer [2023-04-01 04:26:07,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:26:07,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:26:07,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:26:07,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:26:07,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:25:56" (1/3) ... [2023-04-01 04:26:07,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc6799d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:26:07, skipping insertion in model container [2023-04-01 04:26:07,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:25:57" (2/3) ... [2023-04-01 04:26:07,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc6799d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:26:07, skipping insertion in model container [2023-04-01 04:26:07,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:26:07" (3/3) ... [2023-04-01 04:26:07,854 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label11.c [2023-04-01 04:26:07,867 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:26:07,867 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:26:07,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:26:07,937 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;@fc22c20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:26:07,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:26:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:26:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:26:07,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:26:07,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:26:07,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:26:07,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:26:07,957 INFO L85 PathProgramCache]: Analyzing trace with hash 314232323, now seen corresponding path program 1 times [2023-04-01 04:26:07,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:26:07,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825012897] [2023-04-01 04:26:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:07,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:26:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:08,212 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 04:26:08,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:26:08,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825012897] [2023-04-01 04:26:08,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825012897] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:26:08,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:26:08,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:26:08,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351315818] [2023-04-01 04:26:08,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:26:08,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:26:08,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:26:08,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:26:08,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:26:08,238 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 04:26:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:26:10,046 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 04:26:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:26:10,047 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 04:26:10,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:26:10,080 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 04:26:10,082 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 04:26:10,088 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 04:26:10,091 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 472 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:26:10,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 366 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 04:26:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 04:26:10,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 04:26:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6209944751381216) internal successors, (1467), 905 states have internal predecessors, (1467), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 04:26:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions. [2023-04-01 04:26:10,179 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11 [2023-04-01 04:26:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:26:10,180 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions. [2023-04-01 04:26:10,180 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 04:26:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions. [2023-04-01 04:26:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:26:10,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:26:10,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:26:10,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:26:10,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:26:10,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:26:10,182 INFO L85 PathProgramCache]: Analyzing trace with hash 830002902, now seen corresponding path program 1 times [2023-04-01 04:26:10,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:26:10,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848721945] [2023-04-01 04:26:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:10,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:26:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:10,374 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 04:26:10,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:26:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848721945] [2023-04-01 04:26:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848721945] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:26:10,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:26:10,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:26:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518660277] [2023-04-01 04:26:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:26:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:26:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:26:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:26:10,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:26:10,377 INFO L87 Difference]: Start difference. First operand 919 states and 1484 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:26:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:26:12,983 INFO L93 Difference]: Finished difference Result 2795 states and 4544 transitions. [2023-04-01 04:26:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:26:12,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-01 04:26:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:26:12,990 INFO L225 Difference]: With dead ends: 2795 [2023-04-01 04:26:12,990 INFO L226 Difference]: Without dead ends: 1881 [2023-04-01 04:26:12,992 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 04:26:13,004 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1520 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3161 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:26:13,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 94 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3161 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 04:26:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2023-04-01 04:26:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1843. [2023-04-01 04:26:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1809 states have (on average 1.4145936981757876) internal successors, (2559), 1816 states have internal predecessors, (2559), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54) [2023-04-01 04:26:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2624 transitions. [2023-04-01 04:26:13,085 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2624 transitions. Word has length 22 [2023-04-01 04:26:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:26:13,086 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2624 transitions. [2023-04-01 04:26:13,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:26:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2624 transitions. [2023-04-01 04:26:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 04:26:13,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:26:13,087 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:26:13,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:26:13,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:26:13,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:26:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1143776792, now seen corresponding path program 1 times [2023-04-01 04:26:13,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:26:13,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972255779] [2023-04-01 04:26:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:13,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:26:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:26:13,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:26:13,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972255779] [2023-04-01 04:26:13,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972255779] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:26:13,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654554734] [2023-04-01 04:26:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:13,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:26:13,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:26:13,469 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 04:26:13,470 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 04:26:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:13,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:26:13,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:26:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:26:13,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:26:13,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654554734] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:26:13,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:26:13,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:26:13,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040136948] [2023-04-01 04:26:13,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:26:13,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:26:13,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:26:13,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:26:13,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:26:13,663 INFO L87 Difference]: Start difference. First operand 1843 states and 2624 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:26:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:26:15,987 INFO L93 Difference]: Finished difference Result 5615 states and 8140 transitions. [2023-04-01 04:26:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:26:15,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 32 [2023-04-01 04:26:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:26:16,007 INFO L225 Difference]: With dead ends: 5615 [2023-04-01 04:26:16,007 INFO L226 Difference]: Without dead ends: 3777 [2023-04-01 04:26:16,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:26:16,015 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1572 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:26:16,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 59 Invalid, 3460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 04:26:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2023-04-01 04:26:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658. [2023-04-01 04:26:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3573 states have (on average 1.2549678141617688) internal successors, (4484), 3601 states have internal predecessors, (4484), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195) [2023-04-01 04:26:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4698 transitions. [2023-04-01 04:26:16,101 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4698 transitions. Word has length 32 [2023-04-01 04:26:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:26:16,101 INFO L495 AbstractCegarLoop]: Abstraction has 3658 states and 4698 transitions. [2023-04-01 04:26:16,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:26:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4698 transitions. [2023-04-01 04:26:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 04:26:16,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:26:16,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:26:16,122 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 04:26:16,315 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 04:26:16,315 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:26:16,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:26:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1993511596, now seen corresponding path program 1 times [2023-04-01 04:26:16,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:26:16,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530520452] [2023-04-01 04:26:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:16,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:26:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:26:16,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:26:16,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530520452] [2023-04-01 04:26:16,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530520452] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:26:16,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606332219] [2023-04-01 04:26:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:26:16,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:26:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:26:16,445 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 04:26:16,465 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 04:26:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:26:16,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:26:16,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:26:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:26:16,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:26:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:26:16,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606332219] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:26:16,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544465941] [2023-04-01 04:26:16,789 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-01 04:26:16,789 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:26:16,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:26:16,797 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:26:16,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:26:16,918 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:26:17,057 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2023-04-01 04:26:24,574 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 146698 conjuctions. This might take some time... [2023-04-01 04:26:48,008 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1806 conjuctions.