/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_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:48:34,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:48:34,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:48:34,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:48:34,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:48:34,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:48:34,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:48:34,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:48:34,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:48:34,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:48:34,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:48:34,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:48:34,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:48:34,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:48:34,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:48:34,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:48:34,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:48:34,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:48:34,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:48:34,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:48:34,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:48:34,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:48:34,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:48:34,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:48:34,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:48:34,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:48:34,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:48:34,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:48:34,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:48:34,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:48:34,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:48:34,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:48:34,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:48:34,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:48:34,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:48:34,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:48:34,107 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 [2023-03-30 23:48:34,131 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:48:34,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:48:34,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:48:34,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:48:34,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:48:34,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:48:34,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:48:34,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:48:34,138 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:48:34,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:48:34,138 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:48:34,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:48:34,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:48:34,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:48:34,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:48:34,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:48:34,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:48:34,139 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:48:34,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:48:34,139 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:48:34,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:48:34,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:48:34,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:48:34,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:48:34,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:34,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:48:34,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:48:34,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:48:34,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:48:34,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:48:34,140 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:48:34,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:48:34,140 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:48:34,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:48:34,141 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:48:34,141 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:48:34,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:48:34,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:48:34,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:48:34,318 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:48:34,319 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:48:34,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label17.c [2023-03-30 23:48:35,306 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:48:35,759 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:48:35,759 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label17.c [2023-03-30 23:48:35,802 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d223c428/d900ed94458649f79f3f4a6feb152a17/FLAG6cad07ccb [2023-03-30 23:48:35,816 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d223c428/d900ed94458649f79f3f4a6feb152a17 [2023-03-30 23:48:35,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:48:35,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:48:35,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:35,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:48:35,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:48:35,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:35" (1/1) ... [2023-03-30 23:48:35,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2baa3f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:35, skipping insertion in model container [2023-03-30 23:48:35,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:35" (1/1) ... [2023-03-30 23:48:35,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:48:35,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:48:36,154 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_label17.c[1799,1812] [2023-03-30 23:48:37,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:37,039 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:48:37,057 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_label17.c[1799,1812] [2023-03-30 23:48:37,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:37,587 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:48:37,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37 WrapperNode [2023-03-30 23:48:37,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:37,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:48:37,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:48:37,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:48:37,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37" (1/1) ... [2023-03-30 23:48:37,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37" (1/1) ... [2023-03-30 23:48:37,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37" (1/1) ... [2023-03-30 23:48:37,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37" (1/1) ... [2023-03-30 23:48:37,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37" (1/1) ... [2023-03-30 23:48:37,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37" (1/1) ... [2023-03-30 23:48:37,842 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37" (1/1) ... [2023-03-30 23:48:37,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37" (1/1) ... [2023-03-30 23:48:37,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:48:37,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:48:37,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:48:37,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:48:37,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37" (1/1) ... [2023-03-30 23:48:37,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:37,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:48:37,920 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) [2023-03-30 23:48:37,925 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 [2023-03-30 23:48:38,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:48:38,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:48:38,005 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:48:38,005 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:48:38,005 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:48:38,005 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:48:38,005 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:48:38,005 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:48:38,005 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:48:38,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:48:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:48:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:48:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:48:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:48:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:48:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:48:38,079 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:48:38,080 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:48:43,627 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:48:43,643 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:48:43,644 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:48:43,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:48:43 BoogieIcfgContainer [2023-03-30 23:48:43,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:48:43,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:48:43,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:48:43,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:48:43,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:48:35" (1/3) ... [2023-03-30 23:48:43,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e813d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:48:43, skipping insertion in model container [2023-03-30 23:48:43,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:37" (2/3) ... [2023-03-30 23:48:43,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e813d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:48:43, skipping insertion in model container [2023-03-30 23:48:43,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:48:43" (3/3) ... [2023-03-30 23:48:43,662 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label17.c [2023-03-30 23:48:43,674 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:48:43,674 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:48:43,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:48:43,749 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;@55bc4158, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:48:43,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:48:43,821 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) [2023-03-30 23:48:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-30 23:48:43,826 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:43,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:48:43,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:43,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1860806260, now seen corresponding path program 1 times [2023-03-30 23:48:43,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:43,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557537096] [2023-03-30 23:48:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:43,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:44,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:44,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:44,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557537096] [2023-03-30 23:48:44,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557537096] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:44,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:44,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:48:44,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782093366] [2023-03-30 23:48:44,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:44,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:48:44,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:44,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:48:44,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:48:44,177 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-03-30 23:48:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:48:54,024 INFO L93 Difference]: Finished difference Result 5076 states and 9543 transitions. [2023-03-30 23:48:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:48:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2023-03-30 23:48:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:48:54,053 INFO L225 Difference]: With dead ends: 5076 [2023-03-30 23:48:54,053 INFO L226 Difference]: Without dead ends: 3219 [2023-03-30 23:48:54,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:48:54,065 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4678 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 7327 mSolverCounterSat, 1544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4678 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1544 IncrementalHoareTripleChecker+Valid, 7327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:48:54,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4678 Valid, 384 Invalid, 8871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1544 Valid, 7327 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2023-03-30 23:48:54,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2023-03-30 23:48:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3194. [2023-03-30 23:48:54,187 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) [2023-03-30 23:48:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 5073 transitions. [2023-03-30 23:48:54,200 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 5073 transitions. Word has length 16 [2023-03-30 23:48:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:48:54,201 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 5073 transitions. [2023-03-30 23:48:54,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-03-30 23:48:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 5073 transitions. [2023-03-30 23:48:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-30 23:48:54,205 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:54,205 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:48:54,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:48:54,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:54,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:54,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1240185731, now seen corresponding path program 1 times [2023-03-30 23:48:54,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:54,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729162434] [2023-03-30 23:48:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:54,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:54,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:54,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:48:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:54,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:54,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729162434] [2023-03-30 23:48:54,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729162434] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:54,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:54,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:48:54,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865173106] [2023-03-30 23:48:54,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:54,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:48:54,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:54,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:48:54,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:48:54,552 INFO L87 Difference]: Start difference. First operand 3194 states and 5073 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 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) [2023-03-30 23:49:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:18,587 INFO L93 Difference]: Finished difference Result 20617 states and 33713 transitions. [2023-03-30 23:49:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:49:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 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 87 [2023-03-30 23:49:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:18,657 INFO L225 Difference]: With dead ends: 20617 [2023-03-30 23:49:18,657 INFO L226 Difference]: Without dead ends: 17429 [2023-03-30 23:49:18,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:49:18,670 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 11622 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 28035 mSolverCounterSat, 3775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11622 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, 23.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:18,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11622 Valid, 1043 Invalid, 31810 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3775 Valid, 28035 Invalid, 0 Unknown, 0 Unchecked, 23.2s Time] [2023-03-30 23:49:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2023-03-30 23:49:18,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 17373. [2023-03-30 23:49:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17373 states, 17154 states have (on average 1.316544246239944) internal successors, (22584), 17166 states have internal predecessors, (22584), 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) [2023-03-30 23:49:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17373 states to 17373 states and 23468 transitions. [2023-03-30 23:49:18,985 INFO L78 Accepts]: Start accepts. Automaton has 17373 states and 23468 transitions. Word has length 87 [2023-03-30 23:49:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:18,985 INFO L495 AbstractCegarLoop]: Abstraction has 17373 states and 23468 transitions. [2023-03-30 23:49:18,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 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) [2023-03-30 23:49:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 17373 states and 23468 transitions. [2023-03-30 23:49:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-03-30 23:49:18,992 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:18,992 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:49:18,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:49:18,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:18,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash -252485723, now seen corresponding path program 1 times [2023-03-30 23:49:18,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:18,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776541120] [2023-03-30 23:49:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:19,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:19,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:49:19,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:19,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776541120] [2023-03-30 23:49:19,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776541120] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:19,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:19,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:49:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536745740] [2023-03-30 23:49:19,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:19,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:49:19,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:49:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:49:19,376 INFO L87 Difference]: Start difference. First operand 17373 states and 23468 transitions. Second operand has 7 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-03-30 23:49:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:29,991 INFO L93 Difference]: Finished difference Result 51229 states and 72274 transitions. [2023-03-30 23:49:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:49:29,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 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 117 [2023-03-30 23:49:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:30,091 INFO L225 Difference]: With dead ends: 51229 [2023-03-30 23:49:30,091 INFO L226 Difference]: Without dead ends: 33862 [2023-03-30 23:49:30,127 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 [2023-03-30 23:49:30,130 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 8899 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 10631 mSolverCounterSat, 2137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8899 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 12768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2137 IncrementalHoareTripleChecker+Valid, 10631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:30,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8899 Valid, 1102 Invalid, 12768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2137 Valid, 10631 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2023-03-30 23:49:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33862 states. [2023-03-30 23:49:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33862 to 33708. [2023-03-30 23:49:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33708 states, 33057 states have (on average 1.2128747315243367) internal successors, (40094), 33128 states have internal predecessors, (40094), 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) [2023-03-30 23:49:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33708 states to 33708 states and 43724 transitions. [2023-03-30 23:49:30,795 INFO L78 Accepts]: Start accepts. Automaton has 33708 states and 43724 transitions. Word has length 117 [2023-03-30 23:49:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:30,795 INFO L495 AbstractCegarLoop]: Abstraction has 33708 states and 43724 transitions. [2023-03-30 23:49:30,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-03-30 23:49:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 33708 states and 43724 transitions. [2023-03-30 23:49:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-03-30 23:49:30,802 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:30,803 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:49:30,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:49:30,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:30,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:30,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1514533374, now seen corresponding path program 1 times [2023-03-30 23:49:30,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:30,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529426398] [2023-03-30 23:49:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:30,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:30,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:30,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:31,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-03-30 23:49:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:49:31,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:31,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529426398] [2023-03-30 23:49:31,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529426398] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:49:31,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385650924] [2023-03-30 23:49:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:31,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:49:31,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:49:31,158 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) [2023-03-30 23:49:31,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:49:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:31,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:49:31,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:49:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-30 23:49:31,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:49:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385650924] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:31,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:49:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-03-30 23:49:31,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951610493] [2023-03-30 23:49:31,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:31,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:49:31,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:31,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:49:31,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:49:31,465 INFO L87 Difference]: Start difference. First operand 33708 states and 43724 transitions. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 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)