/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 00:02:30,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 00:02:30,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 00:02:30,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 00:02:30,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 00:02:30,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 00:02:30,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 00:02:30,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 00:02:30,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 00:02:30,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 00:02:30,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 00:02:30,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 00:02:30,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 00:02:30,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 00:02:30,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 00:02:30,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 00:02:30,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 00:02:30,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 00:02:30,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 00:02:30,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 00:02:30,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 00:02:30,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 00:02:30,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 00:02:30,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 00:02:30,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 00:02:30,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 00:02:30,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 00:02:30,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 00:02:30,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 00:02:30,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 00:02:30,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 00:02:30,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 00:02:30,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 00:02:30,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 00:02:30,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 00:02:30,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 00:02:30,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 00:02:30,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 00:02:30,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 00:02:30,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 00:02:30,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 00:02:30,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 00:02:30,754 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 00:02:30,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 00:02:30,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 00:02:30,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 00:02:30,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 00:02:30,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 00:02:30,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 00:02:30,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 00:02:30,756 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 00:02:30,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 00:02:30,757 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 00:02:30,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 00:02:30,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 00:02:30,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 00:02:30,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 00:02:30,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 00:02:30,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 00:02:30,758 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 00:02:30,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 00:02:30,758 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 00:02:30,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 00:02:30,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 00:02:30,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 00:02:30,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 00:02:30,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:02:30,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 00:02:30,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 00:02:30,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 00:02:30,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 00:02:30,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 00:02:30,760 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 00:02:30,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 00:02:30,760 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 00:02:30,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 00:02:30,760 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 00:02:30,760 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 00:02:31,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 00:02:31,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 00:02:31,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 00:02:31,028 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 00:02:31,028 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 00:02:31,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label55.c [2023-04-02 00:02:32,279 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 00:02:32,895 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 00:02:32,895 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label55.c [2023-04-02 00:02:32,943 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c41a04fc/234dba5f7cb242f58f0d00eabee918e1/FLAG27ae09db5 [2023-04-02 00:02:32,960 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c41a04fc/234dba5f7cb242f58f0d00eabee918e1 [2023-04-02 00:02:32,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 00:02:32,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 00:02:32,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 00:02:32,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 00:02:32,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 00:02:32,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:02:32" (1/1) ... [2023-04-02 00:02:32,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc3084f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:32, skipping insertion in model container [2023-04-02 00:02:32,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:02:32" (1/1) ... [2023-04-02 00:02:32,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 00:02:33,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 00:02:33,451 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/Problem19_label55.c[2249,2262] [2023-04-02 00:02:34,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:02:34,610 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 00:02:34,636 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/Problem19_label55.c[2249,2262] [2023-04-02 00:02:35,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:02:35,296 INFO L208 MainTranslator]: Completed translation [2023-04-02 00:02:35,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35 WrapperNode [2023-04-02 00:02:35,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 00:02:35,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 00:02:35,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 00:02:35,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 00:02:35,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35" (1/1) ... [2023-04-02 00:02:35,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35" (1/1) ... [2023-04-02 00:02:35,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35" (1/1) ... [2023-04-02 00:02:35,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35" (1/1) ... [2023-04-02 00:02:35,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35" (1/1) ... [2023-04-02 00:02:35,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35" (1/1) ... [2023-04-02 00:02:35,776 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35" (1/1) ... [2023-04-02 00:02:35,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35" (1/1) ... [2023-04-02 00:02:35,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 00:02:35,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 00:02:35,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 00:02:35,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 00:02:35,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35" (1/1) ... [2023-04-02 00:02:35,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:02:35,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:02:35,950 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 00:02:35,973 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 00:02:35,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 00:02:35,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 00:02:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 00:02:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 00:02:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 00:02:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 00:02:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 00:02:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-02 00:02:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-02 00:02:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 00:02:35,994 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 00:02:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 00:02:35,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 00:02:35,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 00:02:35,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 00:02:35,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 00:02:35,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 00:02:36,091 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 00:02:36,094 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 00:02:43,906 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 00:02:43,924 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 00:02:43,924 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 00:02:43,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:02:43 BoogieIcfgContainer [2023-04-02 00:02:43,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 00:02:43,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 00:02:43,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 00:02:43,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 00:02:43,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 12:02:32" (1/3) ... [2023-04-02 00:02:43,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e60e9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:02:43, skipping insertion in model container [2023-04-02 00:02:43,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:02:35" (2/3) ... [2023-04-02 00:02:43,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e60e9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:02:43, skipping insertion in model container [2023-04-02 00:02:43,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:02:43" (3/3) ... [2023-04-02 00:02:43,937 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label55.c [2023-04-02 00:02:43,954 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 00:02:43,954 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 00:02:44,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 00:02:44,032 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=PETRI_NET, 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;@2040f614, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 00:02:44,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 00:02:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 00:02:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 00:02:44,048 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:44,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:02:44,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:44,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:44,054 INFO L85 PathProgramCache]: Analyzing trace with hash 220538756, now seen corresponding path program 1 times [2023-04-02 00:02:44,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:44,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739175232] [2023-04-02 00:02:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:44,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:44,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:44,476 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 00:02:44,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:44,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739175232] [2023-04-02 00:02:44,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739175232] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:02:44,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:02:44,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 00:02:44,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835117801] [2023-04-02 00:02:44,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:02:44,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:02:44,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:44,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:02:44,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:02:44,531 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 00:02:56,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:02:56,109 INFO L93 Difference]: Finished difference Result 5076 states and 9543 transitions. [2023-04-02 00:02:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 00:02:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 20 [2023-04-02 00:02:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:02:56,147 INFO L225 Difference]: With dead ends: 5076 [2023-04-02 00:02:56,147 INFO L226 Difference]: Without dead ends: 3219 [2023-04-02 00:02:56,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:02:56,164 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4674 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 7327 mSolverCounterSat, 1544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4674 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1544 IncrementalHoareTripleChecker+Valid, 7327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2023-04-02 00:02:56,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4674 Valid, 384 Invalid, 8871 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1544 Valid, 7327 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2023-04-02 00:02:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2023-04-02 00:02:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3194. [2023-04-02 00:02:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3154 states have (on average 1.592263792010146) internal successors, (5022), 3156 states have internal predecessors, (5022), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (37), 23 states have call predecessors, (37), 13 states have call successors, (37) [2023-04-02 00:02:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 5073 transitions. [2023-04-02 00:02:56,333 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 5073 transitions. Word has length 20 [2023-04-02 00:02:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:02:56,333 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 5073 transitions. [2023-04-02 00:02:56,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 00:02:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 5073 transitions. [2023-04-02 00:02:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-02 00:02:56,337 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:02:56,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:02:56,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 00:02:56,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:02:56,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:02:56,339 INFO L85 PathProgramCache]: Analyzing trace with hash -783627955, now seen corresponding path program 1 times [2023-04-02 00:02:56,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:02:56,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647334818] [2023-04-02 00:02:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:02:56,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:02:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:56,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:02:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:56,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:02:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:02:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:02:56,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:02:56,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647334818] [2023-04-02 00:02:56,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647334818] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:02:56,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:02:56,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 00:02:56,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344362704] [2023-04-02 00:02:56,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:02:56,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 00:02:56,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:02:56,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 00:02:56,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 00:02:56,769 INFO L87 Difference]: Start difference. First operand 3194 states and 5073 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 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 00:03:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:23,920 INFO L93 Difference]: Finished difference Result 20617 states and 33713 transitions. [2023-04-02 00:03:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 00:03:23,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 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 91 [2023-04-02 00:03:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:24,006 INFO L225 Difference]: With dead ends: 20617 [2023-04-02 00:03:24,006 INFO L226 Difference]: Without dead ends: 17429 [2023-04-02 00:03:24,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-04-02 00:03:24,022 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 11624 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 28035 mSolverCounterSat, 3775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11624 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 31810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3775 IncrementalHoareTripleChecker+Valid, 28035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:24,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11624 Valid, 1043 Invalid, 31810 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3775 Valid, 28035 Invalid, 0 Unknown, 0 Unchecked, 26.2s Time] [2023-04-02 00:03:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2023-04-02 00:03:24,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 17373. [2023-04-02 00:03:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17373 states, 17154 states have (on average 1.3167191325638334) internal successors, (22587), 17166 states have internal predecessors, (22587), 74 states have call successors, (74), 74 states have call predecessors, (74), 144 states have return successors, (810), 132 states have call predecessors, (810), 73 states have call successors, (810) [2023-04-02 00:03:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17373 states to 17373 states and 23471 transitions. [2023-04-02 00:03:24,598 INFO L78 Accepts]: Start accepts. Automaton has 17373 states and 23471 transitions. Word has length 91 [2023-04-02 00:03:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:24,599 INFO L495 AbstractCegarLoop]: Abstraction has 17373 states and 23471 transitions. [2023-04-02 00:03:24,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 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 00:03:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 17373 states and 23471 transitions. [2023-04-02 00:03:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-02 00:03:24,606 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:24,607 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:03:24,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 00:03:24,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:24,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1177149323, now seen corresponding path program 1 times [2023-04-02 00:03:24,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:24,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361352388] [2023-04-02 00:03:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:24,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:24,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:24,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:03:25,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:25,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361352388] [2023-04-02 00:03:25,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361352388] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:03:25,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:03:25,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 00:03:25,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628256501] [2023-04-02 00:03:25,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:03:25,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 00:03:25,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 00:03:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 00:03:25,185 INFO L87 Difference]: Start difference. First operand 17373 states and 23471 transitions. Second operand has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 4 states have internal predecessors, (115), 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 00:03:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:37,137 INFO L93 Difference]: Finished difference Result 51229 states and 72283 transitions. [2023-04-02 00:03:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 00:03:37,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 4 states have internal predecessors, (115), 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 121 [2023-04-02 00:03:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:37,283 INFO L225 Difference]: With dead ends: 51229 [2023-04-02 00:03:37,283 INFO L226 Difference]: Without dead ends: 33862 [2023-04-02 00:03:37,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:03:37,344 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 8895 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 10635 mSolverCounterSat, 2137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8895 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 12772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2137 IncrementalHoareTripleChecker+Valid, 10635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:37,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8895 Valid, 1102 Invalid, 12772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2137 Valid, 10635 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2023-04-02 00:03:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33862 states. [2023-04-02 00:03:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33862 to 33708. [2023-04-02 00:03:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33708 states, 33057 states have (on average 1.2130562361980821) internal successors, (40100), 33128 states have internal predecessors, (40100), 140 states have call successors, (140), 140 states have call predecessors, (140), 510 states have return successors, (3490), 439 states have call predecessors, (3490), 139 states have call successors, (3490) [2023-04-02 00:03:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33708 states to 33708 states and 43730 transitions. [2023-04-02 00:03:38,387 INFO L78 Accepts]: Start accepts. Automaton has 33708 states and 43730 transitions. Word has length 121 [2023-04-02 00:03:38,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:38,387 INFO L495 AbstractCegarLoop]: Abstraction has 33708 states and 43730 transitions. [2023-04-02 00:03:38,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 4 states have internal predecessors, (115), 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 00:03:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 33708 states and 43730 transitions. [2023-04-02 00:03:38,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-04-02 00:03:38,396 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:38,396 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:03:38,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 00:03:38,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:38,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1795745231, now seen corresponding path program 1 times [2023-04-02 00:03:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:38,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445646745] [2023-04-02 00:03:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:38,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:38,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:38,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:38,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-02 00:03:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 26 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 00:03:38,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:38,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445646745] [2023-04-02 00:03:38,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445646745] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:03:38,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027528461] [2023-04-02 00:03:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:38,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:03:38,881 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 00:03:38,883 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 00:03:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:39,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 00:03:39,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:03:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-04-02 00:03:39,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 00:03:39,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027528461] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:03:39,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 00:03:39,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-02 00:03:39,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257733138] [2023-04-02 00:03:39,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:03:39,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 00:03:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 00:03:39,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 00:03:39,070 INFO L87 Difference]: Start difference. First operand 33708 states and 43730 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 00:03:45,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:45,480 INFO L93 Difference]: Finished difference Result 83059 states and 112112 transitions. [2023-04-02 00:03:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 00:03:45,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 210 [2023-04-02 00:03:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:45,651 INFO L225 Difference]: With dead ends: 83059 [2023-04-02 00:03:45,651 INFO L226 Difference]: Without dead ends: 49357 [2023-04-02 00:03:45,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 00:03:45,717 INFO L413 NwaCegarLoop]: 1681 mSDtfsCounter, 1501 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 4071 mSolverCounterSat, 1670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 5741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1670 IncrementalHoareTripleChecker+Valid, 4071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:45,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1501 Valid, 1906 Invalid, 5741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1670 Valid, 4071 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-02 00:03:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49357 states. [2023-04-02 00:03:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49357 to 49298. [2023-04-02 00:03:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49298 states, 48398 states have (on average 1.1769907847431713) internal successors, (56964), 48496 states have internal predecessors, (56964), 206 states have call successors, (206), 206 states have call predecessors, (206), 693 states have return successors, (5554), 595 states have call predecessors, (5554), 205 states have call successors, (5554) [2023-04-02 00:03:46,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49298 states to 49298 states and 62724 transitions. [2023-04-02 00:03:46,847 INFO L78 Accepts]: Start accepts. Automaton has 49298 states and 62724 transitions. Word has length 210 [2023-04-02 00:03:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:46,849 INFO L495 AbstractCegarLoop]: Abstraction has 49298 states and 62724 transitions. [2023-04-02 00:03:46,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 00:03:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 49298 states and 62724 transitions. [2023-04-02 00:03:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-04-02 00:03:46,851 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:46,852 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:03:46,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 00:03:47,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:47,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:03:47,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:03:47,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2062457382, now seen corresponding path program 1 times [2023-04-02 00:03:47,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:03:47,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695013270] [2023-04-02 00:03:47,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:47,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:03:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:47,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:03:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:47,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:03:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:47,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-02 00:03:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 26 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 00:03:47,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:03:47,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695013270] [2023-04-02 00:03:47,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695013270] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:03:47,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566441099] [2023-04-02 00:03:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:03:47,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:03:47,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:03:47,489 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 00:03:47,492 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 00:03:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:03:47,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 00:03:47,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:03:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 00:03:48,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 00:03:48,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566441099] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:03:48,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 00:03:48,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-04-02 00:03:48,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794668851] [2023-04-02 00:03:48,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:03:48,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 00:03:48,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:03:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 00:03:48,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 00:03:48,139 INFO L87 Difference]: Start difference. First operand 49298 states and 62724 transitions. Second operand has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 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 00:03:57,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:03:57,504 INFO L93 Difference]: Finished difference Result 145327 states and 190921 transitions. [2023-04-02 00:03:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 00:03:57,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 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 218 [2023-04-02 00:03:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:03:57,837 INFO L225 Difference]: With dead ends: 145327 [2023-04-02 00:03:57,838 INFO L226 Difference]: Without dead ends: 96035 [2023-04-02 00:03:57,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-02 00:03:57,903 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 7709 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 8348 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7709 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 9240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 8348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-04-02 00:03:57,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7709 Valid, 995 Invalid, 9240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [892 Valid, 8348 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2023-04-02 00:03:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96035 states. [2023-04-02 00:03:59,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96035 to 86105. [2023-04-02 00:03:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86105 states, 84223 states have (on average 1.1711290265129477) internal successors, (98636), 84476 states have internal predecessors, (98636), 356 states have call successors, (356), 356 states have call predecessors, (356), 1525 states have return successors, (11931), 1272 states have call predecessors, (11931), 355 states have call successors, (11931) [2023-04-02 00:03:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86105 states to 86105 states and 110923 transitions. [2023-04-02 00:03:59,961 INFO L78 Accepts]: Start accepts. Automaton has 86105 states and 110923 transitions. Word has length 218 [2023-04-02 00:03:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:03:59,962 INFO L495 AbstractCegarLoop]: Abstraction has 86105 states and 110923 transitions. [2023-04-02 00:03:59,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 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 00:03:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 86105 states and 110923 transitions. [2023-04-02 00:03:59,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2023-04-02 00:03:59,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:03:59,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:59,976 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 00:04:00,176 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 00:04:00,178 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:04:00,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:04:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1438366151, now seen corresponding path program 1 times [2023-04-02 00:04:00,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:04:00,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276946503] [2023-04-02 00:04:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:00,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:04:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:04:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:04:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-02 00:04:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 00:04:01,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:04:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276946503] [2023-04-02 00:04:01,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276946503] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:04:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835994575] [2023-04-02 00:04:01,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:01,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:04:01,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:04:01,457 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 00:04:01,498 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 00:04:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:01,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:04:01,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:04:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:04:01,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:04:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:04:02,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835994575] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:04:02,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:04:02,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-02 00:04:02,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696358030] [2023-04-02 00:04:02,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:04:02,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 00:04:02,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:04:02,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 00:04:02,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:04:02,354 INFO L87 Difference]: Start difference. First operand 86105 states and 110923 transitions. Second operand has 12 states, 12 states have (on average 59.666666666666664) internal successors, (716), 10 states have internal predecessors, (716), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 00:04:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:04:22,043 INFO L93 Difference]: Finished difference Result 259536 states and 364778 transitions. [2023-04-02 00:04:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 00:04:22,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 59.666666666666664) internal successors, (716), 10 states have internal predecessors, (716), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 395 [2023-04-02 00:04:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:04:23,121 INFO L225 Difference]: With dead ends: 259536 [2023-04-02 00:04:23,121 INFO L226 Difference]: Without dead ends: 173437 [2023-04-02 00:04:23,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 813 GetRequests, 792 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2023-04-02 00:04:23,227 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 9745 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 20692 mSolverCounterSat, 6550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9745 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 27242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6550 IncrementalHoareTripleChecker+Valid, 20692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2023-04-02 00:04:23,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9745 Valid, 1633 Invalid, 27242 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6550 Valid, 20692 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2023-04-02 00:04:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173437 states. [2023-04-02 00:04:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173437 to 168686. [2023-04-02 00:04:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168686 states, 164421 states have (on average 1.1720096581336934) internal successors, (192703), 165103 states have internal predecessors, (192703), 692 states have call successors, (692), 692 states have call predecessors, (692), 3572 states have return successors, (38089), 2890 states have call predecessors, (38089), 691 states have call successors, (38089) [2023-04-02 00:04:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168686 states to 168686 states and 231484 transitions. [2023-04-02 00:04:27,250 INFO L78 Accepts]: Start accepts. Automaton has 168686 states and 231484 transitions. Word has length 395 [2023-04-02 00:04:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:04:27,251 INFO L495 AbstractCegarLoop]: Abstraction has 168686 states and 231484 transitions. [2023-04-02 00:04:27,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.666666666666664) internal successors, (716), 10 states have internal predecessors, (716), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 00:04:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 168686 states and 231484 transitions. [2023-04-02 00:04:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2023-04-02 00:04:27,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:04:27,264 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:04:27,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 00:04:27,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:04:27,480 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:04:27,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:04:27,481 INFO L85 PathProgramCache]: Analyzing trace with hash 110792886, now seen corresponding path program 1 times [2023-04-02 00:04:27,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:04:27,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908097135] [2023-04-02 00:04:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:27,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:04:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:04:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:28,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:04:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:28,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-02 00:04:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:28,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2023-04-02 00:04:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 366 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-02 00:04:28,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:04:28,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908097135] [2023-04-02 00:04:28,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908097135] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:04:28,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251853719] [2023-04-02 00:04:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:28,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:04:28,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:04:28,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:04:28,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 00:04:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:04:28,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:04:28,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:04:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 368 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-02 00:04:28,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:04:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 368 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-02 00:04:29,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251853719] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:04:29,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:04:29,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-02 00:04:29,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502170610] [2023-04-02 00:04:29,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:04:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 00:04:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:04:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 00:04:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-02 00:04:29,499 INFO L87 Difference]: Start difference. First operand 168686 states and 231484 transitions. Second operand has 12 states, 12 states have (on average 60.916666666666664) internal successors, (731), 10 states have internal predecessors, (731), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 00:04:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:04:52,407 INFO L93 Difference]: Finished difference Result 450368 states and 647238 transitions. [2023-04-02 00:04:52,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 00:04:52,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 60.916666666666664) internal successors, (731), 10 states have internal predecessors, (731), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 618 [2023-04-02 00:04:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:04:53,394 INFO L225 Difference]: With dead ends: 450368 [2023-04-02 00:04:53,395 INFO L226 Difference]: Without dead ends: 273156 [2023-04-02 00:04:53,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1273 GetRequests, 1249 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2023-04-02 00:04:53,682 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 11445 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 28100 mSolverCounterSat, 3817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11445 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 31917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3817 IncrementalHoareTripleChecker+Valid, 28100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2023-04-02 00:04:53,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11445 Valid, 1694 Invalid, 31917 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3817 Valid, 28100 Invalid, 0 Unknown, 0 Unchecked, 19.0s Time] [2023-04-02 00:04:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273156 states. [2023-04-02 00:04:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273156 to 256727. [2023-04-02 00:04:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256727 states, 250007 states have (on average 1.08867351714152) internal successors, (272176), 251172 states have internal predecessors, (272176), 1052 states have call successors, (1052), 1052 states have call predecessors, (1052), 5667 states have return successors, (41650), 4502 states have call predecessors, (41650), 1051 states have call successors, (41650) [2023-04-02 00:04:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256727 states to 256727 states and 314878 transitions. [2023-04-02 00:04:59,135 INFO L78 Accepts]: Start accepts. Automaton has 256727 states and 314878 transitions. Word has length 618 [2023-04-02 00:04:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:04:59,136 INFO L495 AbstractCegarLoop]: Abstraction has 256727 states and 314878 transitions. [2023-04-02 00:04:59,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.916666666666664) internal successors, (731), 10 states have internal predecessors, (731), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 00:04:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 256727 states and 314878 transitions. [2023-04-02 00:04:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2023-04-02 00:04:59,163 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:04:59,163 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:04:59,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 00:04:59,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:04:59,370 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:04:59,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:04:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash -633439371, now seen corresponding path program 1 times [2023-04-02 00:04:59,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:04:59,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680781782] [2023-04-02 00:04:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:04:59,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:04:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:00,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:05:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:00,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:05:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:00,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:05:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:00,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-02 00:05:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:00,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-02 00:05:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:00,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 817 [2023-04-02 00:05:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2023-04-02 00:05:00,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:05:00,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680781782] [2023-04-02 00:05:00,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680781782] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:05:00,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936833930] [2023-04-02 00:05:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:05:00,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:05:00,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:05:00,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:05:00,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 00:05:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:00,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 00:05:00,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:05:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2023-04-02 00:05:00,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 00:05:00,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936833930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:05:00,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 00:05:00,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 00:05:01,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529812309] [2023-04-02 00:05:01,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:05:01,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:05:01,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:05:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:05:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 00:05:01,002 INFO L87 Difference]: Start difference. First operand 256727 states and 314878 transitions. Second operand has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 00:05:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:05:13,893 INFO L93 Difference]: Finished difference Result 699494 states and 890983 transitions. [2023-04-02 00:05:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 00:05:13,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 900 [2023-04-02 00:05:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:05:15,838 INFO L225 Difference]: With dead ends: 699494 [2023-04-02 00:05:15,839 INFO L226 Difference]: Without dead ends: 444162 [2023-04-02 00:05:16,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 911 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 00:05:16,090 INFO L413 NwaCegarLoop]: 2907 mSDtfsCounter, 3045 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 8369 mSolverCounterSat, 1719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3045 SdHoareTripleChecker+Valid, 3194 SdHoareTripleChecker+Invalid, 10088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1719 IncrementalHoareTripleChecker+Valid, 8369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-04-02 00:05:16,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3045 Valid, 3194 Invalid, 10088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1719 Valid, 8369 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-04-02 00:05:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444162 states. [2023-04-02 00:05:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444162 to 441361. [2023-04-02 00:05:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441361 states, 432591 states have (on average 1.0900804686181635) internal successors, (471559), 433903 states have internal predecessors, (471559), 1844 states have call successors, (1844), 1844 states have call predecessors, (1844), 6925 states have return successors, (71715), 5613 states have call predecessors, (71715), 1843 states have call successors, (71715) [2023-04-02 00:05:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441361 states to 441361 states and 545118 transitions. [2023-04-02 00:05:26,959 INFO L78 Accepts]: Start accepts. Automaton has 441361 states and 545118 transitions. Word has length 900 [2023-04-02 00:05:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:05:26,961 INFO L495 AbstractCegarLoop]: Abstraction has 441361 states and 545118 transitions. [2023-04-02 00:05:26,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 00:05:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 441361 states and 545118 transitions. [2023-04-02 00:05:27,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2023-04-02 00:05:27,003 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:05:27,017 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:27,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 00:05:27,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:05:27,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:05:27,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:05:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash 110679557, now seen corresponding path program 1 times [2023-04-02 00:05:27,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:05:27,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850810314] [2023-04-02 00:05:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:05:27,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:05:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:28,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:05:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:28,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:05:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:29,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-02 00:05:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:29,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-02 00:05:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:29,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-02 00:05:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 474 proven. 2 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2023-04-02 00:05:29,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:05:29,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850810314] [2023-04-02 00:05:29,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850810314] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:05:29,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910373312] [2023-04-02 00:05:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:05:29,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:05:29,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:05:29,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 00:05:29,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 00:05:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:05:30,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 00:05:30,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:05:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 476 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-04-02 00:05:30,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:05:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 476 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-04-02 00:05:31,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910373312] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:05:31,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:05:31,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-02 00:05:31,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368964521] [2023-04-02 00:05:31,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:05:31,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 00:05:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:05:31,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 00:05:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-02 00:05:31,400 INFO L87 Difference]: Start difference. First operand 441361 states and 545118 transitions. Second operand has 11 states, 11 states have (on average 107.0909090909091) internal successors, (1178), 9 states have internal predecessors, (1178), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-02 00:05:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:05:55,173 INFO L93 Difference]: Finished difference Result 962090 states and 1214172 transitions. [2023-04-02 00:05:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 00:05:55,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 107.0909090909091) internal successors, (1178), 9 states have internal predecessors, (1178), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 955 [2023-04-02 00:05:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted.