/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/Problem18_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:46:08,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:46:08,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:46:08,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:46:08,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:46:08,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:46:08,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:46:08,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:46:08,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:46:08,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:46:08,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:46:08,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:46:08,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:46:08,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:46:08,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:46:08,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:46:08,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:46:08,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:46:08,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:46:08,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:46:08,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:46:08,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:46:08,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:46:08,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:46:08,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-30 23:46:08,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-30 23:46:08,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-30 23:46:08,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-30 23:46:08,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-30 23:46:08,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-30 23:46:08,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:46:08,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:46:08,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:46:08,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:46:08,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:46:08,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:46:08,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:46:08,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:46:08,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:46:08,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:46:08,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:46:08,879 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 23:46:08,901 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:46:08,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:46:08,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:46:08,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:46:08,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:46:08,903 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:46:08,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:46:08,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:46:08,904 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:46:08,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:46:08,904 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:46:08,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:46:08,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:46:08,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:46:08,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:46:08,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:46:08,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:46:08,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:46:08,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:46:08,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:46:08,906 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:46:08,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:46:08,906 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:46:08,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:46:08,907 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:46:08,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:46:09,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:46:09,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:46:09,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:46:09,103 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:46:09,103 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:46:09,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label44.c [2023-03-30 23:46:10,150 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:46:10,465 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:46:10,465 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label44.c [2023-03-30 23:46:10,485 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdfd7eea0/9ab37c5a9640422e9cb9e63194c539dd/FLAG7e5e9f73b [2023-03-30 23:46:10,739 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdfd7eea0/9ab37c5a9640422e9cb9e63194c539dd [2023-03-30 23:46:10,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:46:10,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:46:10,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:46:10,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:46:10,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:46:10,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:46:10" (1/1) ... [2023-03-30 23:46:10,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476822fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:10, skipping insertion in model container [2023-03-30 23:46:10,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:46:10" (1/1) ... [2023-03-30 23:46:10,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:46:10,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:46:11,007 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label44.c[3592,3605] [2023-03-30 23:46:11,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:46:11,394 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:46:11,417 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label44.c[3592,3605] [2023-03-30 23:46:11,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:46:11,670 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:46:11,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11 WrapperNode [2023-03-30 23:46:11,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:46:11,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:46:11,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:46:11,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:46:11,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11" (1/1) ... [2023-03-30 23:46:11,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11" (1/1) ... [2023-03-30 23:46:11,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11" (1/1) ... [2023-03-30 23:46:11,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11" (1/1) ... [2023-03-30 23:46:11,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11" (1/1) ... [2023-03-30 23:46:11,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11" (1/1) ... [2023-03-30 23:46:11,799 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11" (1/1) ... [2023-03-30 23:46:11,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11" (1/1) ... [2023-03-30 23:46:11,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:46:11,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:46:11,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:46:11,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:46:11,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11" (1/1) ... [2023-03-30 23:46:11,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:46:11,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:11,867 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 23:46:11,885 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 23:46:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:46:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:46:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:46:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:46:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:46:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:46:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:46:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:46:11,948 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:46:11,950 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:46:14,171 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:46:14,185 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:46:14,186 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:46:14,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:46:14 BoogieIcfgContainer [2023-03-30 23:46:14,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:46:14,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:46:14,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:46:14,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:46:14,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:46:10" (1/3) ... [2023-03-30 23:46:14,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fade02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:46:14, skipping insertion in model container [2023-03-30 23:46:14,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:46:11" (2/3) ... [2023-03-30 23:46:14,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fade02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:46:14, skipping insertion in model container [2023-03-30 23:46:14,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:46:14" (3/3) ... [2023-03-30 23:46:14,195 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label44.c [2023-03-30 23:46:14,207 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:46:14,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:46:14,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:46:14,269 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;@7c6116e1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:46:14,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:46:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 23:46:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 23:46:14,283 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:14,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:14,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:14,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1785436549, now seen corresponding path program 1 times [2023-03-30 23:46:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298600176] [2023-03-30 23:46:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:14,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:14,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:14,654 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 23:46:14,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:14,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298600176] [2023-03-30 23:46:14,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298600176] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:14,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:46:14,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:46:14,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711630182] [2023-03-30 23:46:14,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:14,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:46:14,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:14,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:46:14,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:46:14,688 INFO L87 Difference]: Start difference. First operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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 23:46:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:18,396 INFO L93 Difference]: Finished difference Result 2270 states and 4349 transitions. [2023-03-30 23:46:18,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:46:18,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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 38 [2023-03-30 23:46:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:18,418 INFO L225 Difference]: With dead ends: 2270 [2023-03-30 23:46:18,418 INFO L226 Difference]: Without dead ends: 1432 [2023-03-30 23:46:18,429 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 23:46:18,432 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2155 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3363 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2155 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 3363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:18,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2155 Valid, 37 Invalid, 3955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 3363 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-30 23:46:18,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-03-30 23:46:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1425. [2023-03-30 23:46:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1404 states have (on average 1.5690883190883191) internal successors, (2203), 1406 states have internal predecessors, (2203), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2023-03-30 23:46:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2229 transitions. [2023-03-30 23:46:18,551 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2229 transitions. Word has length 38 [2023-03-30 23:46:18,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:18,551 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 2229 transitions. [2023-03-30 23:46:18,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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 23:46:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2229 transitions. [2023-03-30 23:46:18,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-03-30 23:46:18,554 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:18,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:46:18,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:46:18,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:18,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1967167714, now seen corresponding path program 1 times [2023-03-30 23:46:18,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:18,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657440915] [2023-03-30 23:46:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:18,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:18,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:18,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:18,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657440915] [2023-03-30 23:46:18,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657440915] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:18,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:46:18,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:46:18,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412663796] [2023-03-30 23:46:18,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:18,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:46:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:18,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:46:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:46:18,844 INFO L87 Difference]: Start difference. First operand 1425 states and 2229 transitions. Second operand has 7 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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 23:46:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:22,826 INFO L93 Difference]: Finished difference Result 4355 states and 6855 transitions. [2023-03-30 23:46:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:46:22,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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 108 [2023-03-30 23:46:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:22,839 INFO L225 Difference]: With dead ends: 4355 [2023-03-30 23:46:22,839 INFO L226 Difference]: Without dead ends: 2936 [2023-03-30 23:46:22,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:46:22,845 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3812 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 4845 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3812 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 5671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 4845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:22,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3812 Valid, 123 Invalid, 5671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [826 Valid, 4845 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-03-30 23:46:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2023-03-30 23:46:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2886. [2023-03-30 23:46:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2831 states have (on average 1.3733663016601907) internal successors, (3888), 2842 states have internal predecessors, (3888), 14 states have call successors, (14), 14 states have call predecessors, (14), 40 states have return successors, (85), 29 states have call predecessors, (85), 13 states have call successors, (85) [2023-03-30 23:46:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 3987 transitions. [2023-03-30 23:46:22,904 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 3987 transitions. Word has length 108 [2023-03-30 23:46:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:22,905 INFO L495 AbstractCegarLoop]: Abstraction has 2886 states and 3987 transitions. [2023-03-30 23:46:22,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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 23:46:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 3987 transitions. [2023-03-30 23:46:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-03-30 23:46:22,907 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:22,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:46:22,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:46:22,908 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:22,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1336475386, now seen corresponding path program 1 times [2023-03-30 23:46:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:22,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467105853] [2023-03-30 23:46:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:22,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:23,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:23,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:23,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:23,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467105853] [2023-03-30 23:46:23,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467105853] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:23,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:46:23,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:46:23,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030022899] [2023-03-30 23:46:23,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:23,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:46:23,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:23,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:46:23,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:46:23,239 INFO L87 Difference]: Start difference. First operand 2886 states and 3987 transitions. Second operand has 8 states, 7 states have (on average 23.428571428571427) internal successors, (164), 5 states have internal predecessors, (164), 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 23:46:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:28,823 INFO L93 Difference]: Finished difference Result 11696 states and 16595 transitions. [2023-03-30 23:46:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:46:28,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 23.428571428571427) internal successors, (164), 5 states have internal predecessors, (164), 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 170 [2023-03-30 23:46:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:28,851 INFO L225 Difference]: With dead ends: 11696 [2023-03-30 23:46:28,851 INFO L226 Difference]: Without dead ends: 8816 [2023-03-30 23:46:28,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:46:28,858 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3829 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 7432 mSolverCounterSat, 1568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 9000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1568 IncrementalHoareTripleChecker+Valid, 7432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:28,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3829 Valid, 118 Invalid, 9000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1568 Valid, 7432 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-03-30 23:46:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2023-03-30 23:46:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 8757. [2023-03-30 23:46:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8757 states, 8556 states have (on average 1.2331697054698456) internal successors, (10551), 8606 states have internal predecessors, (10551), 38 states have call successors, (38), 38 states have call predecessors, (38), 162 states have return successors, (568), 112 states have call predecessors, (568), 37 states have call successors, (568) [2023-03-30 23:46:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8757 states to 8757 states and 11157 transitions. [2023-03-30 23:46:29,009 INFO L78 Accepts]: Start accepts. Automaton has 8757 states and 11157 transitions. Word has length 170 [2023-03-30 23:46:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:29,009 INFO L495 AbstractCegarLoop]: Abstraction has 8757 states and 11157 transitions. [2023-03-30 23:46:29,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 23.428571428571427) internal successors, (164), 5 states have internal predecessors, (164), 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 23:46:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 8757 states and 11157 transitions. [2023-03-30 23:46:29,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-03-30 23:46:29,012 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:29,012 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:29,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:46:29,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:29,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:29,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1322660370, now seen corresponding path program 1 times [2023-03-30 23:46:29,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:29,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49590761] [2023-03-30 23:46:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:29,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:29,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:29,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:29,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:46:29,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:29,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49590761] [2023-03-30 23:46:29,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49590761] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:29,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503163603] [2023-03-30 23:46:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:29,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:29,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:29,272 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 23:46:29,275 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 23:46:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:29,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:29,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:29,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:29,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503163603] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:29,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:29,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:46:29,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933414929] [2023-03-30 23:46:29,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:29,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:46:29,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:29,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:46:29,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:46:29,779 INFO L87 Difference]: Start difference. First operand 8757 states and 11157 transitions. Second operand has 11 states, 11 states have (on average 33.36363636363637) internal successors, (367), 9 states have internal predecessors, (367), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:46:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:36,295 INFO L93 Difference]: Finished difference Result 23722 states and 31240 transitions. [2023-03-30 23:46:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-30 23:46:36,296 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 33.36363636363637) internal successors, (367), 9 states have internal predecessors, (367), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 233 [2023-03-30 23:46:36,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:36,348 INFO L225 Difference]: With dead ends: 23722 [2023-03-30 23:46:36,348 INFO L226 Difference]: Without dead ends: 13303 [2023-03-30 23:46:36,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 470 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-03-30 23:46:36,372 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 3195 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 12134 mSolverCounterSat, 1890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3198 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 14024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1890 IncrementalHoareTripleChecker+Valid, 12134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:36,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3198 Valid, 224 Invalid, 14024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1890 Valid, 12134 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-03-30 23:46:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13303 states. [2023-03-30 23:46:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13303 to 11715. [2023-03-30 23:46:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11715 states, 11430 states have (on average 1.0864391951006125) internal successors, (12418), 11510 states have internal predecessors, (12418), 50 states have call successors, (50), 50 states have call predecessors, (50), 234 states have return successors, (723), 154 states have call predecessors, (723), 49 states have call successors, (723) [2023-03-30 23:46:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11715 states to 11715 states and 13191 transitions. [2023-03-30 23:46:36,638 INFO L78 Accepts]: Start accepts. Automaton has 11715 states and 13191 transitions. Word has length 233 [2023-03-30 23:46:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:36,640 INFO L495 AbstractCegarLoop]: Abstraction has 11715 states and 13191 transitions. [2023-03-30 23:46:36,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 33.36363636363637) internal successors, (367), 9 states have internal predecessors, (367), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:46:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 11715 states and 13191 transitions. [2023-03-30 23:46:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-03-30 23:46:36,644 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:36,644 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 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, 1, 1, 1, 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 23:46:36,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:36,850 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 [2023-03-30 23:46:36,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:36,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1604700420, now seen corresponding path program 1 times [2023-03-30 23:46:36,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:36,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107966674] [2023-03-30 23:46:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:36,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:37,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:37,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:37,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:37,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 96 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:37,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:37,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107966674] [2023-03-30 23:46:37,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107966674] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:37,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299606749] [2023-03-30 23:46:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:37,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:37,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:37,170 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) [2023-03-30 23:46:37,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:46:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:37,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:37,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:37,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:46:37,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299606749] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:37,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:46:37,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:46:37,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120791333] [2023-03-30 23:46:37,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:37,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:46:37,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:37,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:46:37,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:46:37,377 INFO L87 Difference]: Start difference. First operand 11715 states and 13191 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2023-03-30 23:46:39,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:39,081 INFO L93 Difference]: Finished difference Result 33457 states and 38616 transitions. [2023-03-30 23:46:39,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:46:39,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 354 [2023-03-30 23:46:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:39,130 INFO L225 Difference]: With dead ends: 33457 [2023-03-30 23:46:39,130 INFO L226 Difference]: Without dead ends: 21748 [2023-03-30 23:46:39,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:46:39,152 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 677 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:39,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 931 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 23:46:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21748 states. [2023-03-30 23:46:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21748 to 21743. [2023-03-30 23:46:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21743 states, 21292 states have (on average 1.0749577306030433) internal successors, (22888), 21418 states have internal predecessors, (22888), 92 states have call successors, (92), 92 states have call predecessors, (92), 358 states have return successors, (1698), 232 states have call predecessors, (1698), 91 states have call successors, (1698) [2023-03-30 23:46:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21743 states to 21743 states and 24678 transitions. [2023-03-30 23:46:39,566 INFO L78 Accepts]: Start accepts. Automaton has 21743 states and 24678 transitions. Word has length 354 [2023-03-30 23:46:39,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:39,566 INFO L495 AbstractCegarLoop]: Abstraction has 21743 states and 24678 transitions. [2023-03-30 23:46:39,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2023-03-30 23:46:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 21743 states and 24678 transitions. [2023-03-30 23:46:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2023-03-30 23:46:39,570 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:39,571 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:39,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:39,771 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 [2023-03-30 23:46:39,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:39,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2000458724, now seen corresponding path program 1 times [2023-03-30 23:46:39,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:39,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028552240] [2023-03-30 23:46:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:39,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:40,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:40,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:40,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:40,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 96 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:46:40,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:40,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028552240] [2023-03-30 23:46:40,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028552240] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:40,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785743388] [2023-03-30 23:46:40,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:40,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:40,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:40,096 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) [2023-03-30 23:46:40,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:46:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:40,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:40,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:46:40,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:46:40,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785743388] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:40,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:46:40,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:46:40,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104372473] [2023-03-30 23:46:40,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:40,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:46:40,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:40,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:46:40,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:46:40,255 INFO L87 Difference]: Start difference. First operand 21743 states and 24678 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2023-03-30 23:46:41,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:41,792 INFO L93 Difference]: Finished difference Result 43480 states and 49350 transitions. [2023-03-30 23:46:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:46:41,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 398 [2023-03-30 23:46:41,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:41,839 INFO L225 Difference]: With dead ends: 43480 [2023-03-30 23:46:41,839 INFO L226 Difference]: Without dead ends: 21743 [2023-03-30 23:46:41,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:46:41,872 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 734 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:41,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 946 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-30 23:46:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21743 states. [2023-03-30 23:46:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21743 to 20329. [2023-03-30 23:46:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20329 states, 19894 states have (on average 1.0521262692269027) internal successors, (20931), 20018 states have internal predecessors, (20931), 86 states have call successors, (86), 86 states have call predecessors, (86), 348 states have return successors, (1118), 224 states have call predecessors, (1118), 85 states have call successors, (1118) [2023-03-30 23:46:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20329 states to 20329 states and 22135 transitions. [2023-03-30 23:46:42,177 INFO L78 Accepts]: Start accepts. Automaton has 20329 states and 22135 transitions. Word has length 398 [2023-03-30 23:46:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:42,178 INFO L495 AbstractCegarLoop]: Abstraction has 20329 states and 22135 transitions. [2023-03-30 23:46:42,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2023-03-30 23:46:42,178 INFO L276 IsEmpty]: Start isEmpty. Operand 20329 states and 22135 transitions. [2023-03-30 23:46:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-03-30 23:46:42,184 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:42,184 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:46:42,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 23:46:42,389 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 [2023-03-30 23:46:42,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:42,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:42,392 INFO L85 PathProgramCache]: Analyzing trace with hash -100158537, now seen corresponding path program 1 times [2023-03-30 23:46:42,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:42,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171873782] [2023-03-30 23:46:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:42,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:42,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:42,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:42,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:42,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:42,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2023-03-30 23:46:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 427 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2023-03-30 23:46:43,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:43,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171873782] [2023-03-30 23:46:43,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171873782] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:43,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454566978] [2023-03-30 23:46:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:43,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:43,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:43,011 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) [2023-03-30 23:46:43,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:46:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:43,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:43,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 430 proven. 2 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:43,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 430 proven. 2 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:46:43,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454566978] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:43,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:43,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:46:43,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545299061] [2023-03-30 23:46:43,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:43,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:46:43,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:43,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:46:43,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:46:43,516 INFO L87 Difference]: Start difference. First operand 20329 states and 22135 transitions. Second operand has 12 states, 12 states have (on average 40.083333333333336) internal successors, (481), 10 states have internal predecessors, (481), 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) [2023-03-30 23:46:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:48,939 INFO L93 Difference]: Finished difference Result 46454 states and 51175 transitions. [2023-03-30 23:46:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 23:46:48,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 40.083333333333336) internal successors, (481), 10 states have internal predecessors, (481), 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 462 [2023-03-30 23:46:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:48,991 INFO L225 Difference]: With dead ends: 46454 [2023-03-30 23:46:48,991 INFO L226 Difference]: Without dead ends: 23993 [2023-03-30 23:46:49,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 938 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2023-03-30 23:46:49,021 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5144 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 8698 mSolverCounterSat, 1069 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5144 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 9767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1069 IncrementalHoareTripleChecker+Valid, 8698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:49,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5144 Valid, 234 Invalid, 9767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1069 Valid, 8698 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-03-30 23:46:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23993 states. [2023-03-30 23:46:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23993 to 23939. [2023-03-30 23:46:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23939 states, 23434 states have (on average 1.0516343774003585) internal successors, (24644), 23578 states have internal predecessors, (24644), 101 states have call successors, (101), 101 states have call predecessors, (101), 403 states have return successors, (1391), 259 states have call predecessors, (1391), 100 states have call successors, (1391) [2023-03-30 23:46:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23939 states to 23939 states and 26136 transitions. [2023-03-30 23:46:49,384 INFO L78 Accepts]: Start accepts. Automaton has 23939 states and 26136 transitions. Word has length 462 [2023-03-30 23:46:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:49,384 INFO L495 AbstractCegarLoop]: Abstraction has 23939 states and 26136 transitions. [2023-03-30 23:46:49,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 40.083333333333336) internal successors, (481), 10 states have internal predecessors, (481), 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) [2023-03-30 23:46:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 23939 states and 26136 transitions. [2023-03-30 23:46:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2023-03-30 23:46:49,392 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:49,392 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 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, 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 23:46:49,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:49,598 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 [2023-03-30 23:46:49,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:49,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:49,598 INFO L85 PathProgramCache]: Analyzing trace with hash -90036969, now seen corresponding path program 1 times [2023-03-30 23:46:49,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:49,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881936776] [2023-03-30 23:46:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:49,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:49,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:49,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:49,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:49,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:49,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2023-03-30 23:46:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-03-30 23:46:49,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:49,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881936776] [2023-03-30 23:46:49,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881936776] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:49,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497170279] [2023-03-30 23:46:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:49,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:49,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:49,979 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) [2023-03-30 23:46:49,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:46:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:50,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:46:50,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 368 proven. 2 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:46:50,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 368 proven. 2 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:46:50,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497170279] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:50,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:50,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:46:50,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882561261] [2023-03-30 23:46:50,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:50,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:46:50,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:46:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:46:50,497 INFO L87 Difference]: Start difference. First operand 23939 states and 26136 transitions. Second operand has 11 states, 11 states have (on average 36.54545454545455) internal successors, (402), 9 states have internal predecessors, (402), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:46:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:54,500 INFO L93 Difference]: Finished difference Result 54301 states and 59726 transitions. [2023-03-30 23:46:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 23:46:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 36.54545454545455) internal successors, (402), 9 states have internal predecessors, (402), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 478 [2023-03-30 23:46:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:54,566 INFO L225 Difference]: With dead ends: 54301 [2023-03-30 23:46:54,567 INFO L226 Difference]: Without dead ends: 30368 [2023-03-30 23:46:54,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 972 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2023-03-30 23:46:54,595 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 5594 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 5800 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5594 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 6526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 5800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:54,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5594 Valid, 217 Invalid, 6526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 5800 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-30 23:46:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30368 states. [2023-03-30 23:46:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30368 to 29618. [2023-03-30 23:46:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29618 states, 29040 states have (on average 1.0425964187327823) internal successors, (30277), 29196 states have internal predecessors, (30277), 125 states have call successors, (125), 125 states have call predecessors, (125), 452 states have return successors, (1525), 296 states have call predecessors, (1525), 124 states have call successors, (1525) [2023-03-30 23:46:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29618 states to 29618 states and 31927 transitions. [2023-03-30 23:46:55,127 INFO L78 Accepts]: Start accepts. Automaton has 29618 states and 31927 transitions. Word has length 478 [2023-03-30 23:46:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:55,128 INFO L495 AbstractCegarLoop]: Abstraction has 29618 states and 31927 transitions. [2023-03-30 23:46:55,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 36.54545454545455) internal successors, (402), 9 states have internal predecessors, (402), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:46:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 29618 states and 31927 transitions. [2023-03-30 23:46:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-03-30 23:46:55,134 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:55,134 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:55,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:55,344 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 [2023-03-30 23:46:55,344 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:55,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:55,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2044187606, now seen corresponding path program 1 times [2023-03-30 23:46:55,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:55,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133256238] [2023-03-30 23:46:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:55,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:55,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:55,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:55,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:55,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:46:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:46:56,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:56,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133256238] [2023-03-30 23:46:56,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133256238] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:56,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429155075] [2023-03-30 23:46:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:56,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:56,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:56,105 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) [2023-03-30 23:46:56,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:46:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:56,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:46:56,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:56,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:46:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:46:57,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429155075] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:46:57,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:46:57,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:46:57,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829063804] [2023-03-30 23:46:57,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:46:57,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:46:57,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:46:57,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:46:57,469 INFO L87 Difference]: Start difference. First operand 29618 states and 31927 transitions. Second operand has 12 states, 12 states have (on average 94.91666666666667) internal successors, (1139), 10 states have internal predecessors, (1139), 7 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-30 23:47:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:47:04,015 INFO L93 Difference]: Finished difference Result 74676 states and 82714 transitions. [2023-03-30 23:47:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-30 23:47:04,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 94.91666666666667) internal successors, (1139), 10 states have internal predecessors, (1139), 7 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 492 [2023-03-30 23:47:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:47:04,105 INFO L225 Difference]: With dead ends: 74676 [2023-03-30 23:47:04,105 INFO L226 Difference]: Without dead ends: 44343 [2023-03-30 23:47:04,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 992 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2023-03-30 23:47:04,126 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 4328 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 12771 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4332 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 13597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 12771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:47:04,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4332 Valid, 312 Invalid, 13597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [826 Valid, 12771 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-03-30 23:47:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44343 states. [2023-03-30 23:47:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44343 to 43616. [2023-03-30 23:47:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43616 states, 42686 states have (on average 1.0346015086913742) internal successors, (44163), 42951 states have internal predecessors, (44163), 237 states have call successors, (237), 182 states have call predecessors, (237), 692 states have return successors, (3567), 482 states have call predecessors, (3567), 236 states have call successors, (3567) [2023-03-30 23:47:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43616 states to 43616 states and 47967 transitions. [2023-03-30 23:47:04,825 INFO L78 Accepts]: Start accepts. Automaton has 43616 states and 47967 transitions. Word has length 492 [2023-03-30 23:47:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:47:04,826 INFO L495 AbstractCegarLoop]: Abstraction has 43616 states and 47967 transitions. [2023-03-30 23:47:04,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 94.91666666666667) internal successors, (1139), 10 states have internal predecessors, (1139), 7 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-30 23:47:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 43616 states and 47967 transitions. [2023-03-30 23:47:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2023-03-30 23:47:04,832 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:47:04,832 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:47:04,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 23:47:05,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:47:05,038 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:47:05,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:47:05,039 INFO L85 PathProgramCache]: Analyzing trace with hash -624905919, now seen corresponding path program 1 times [2023-03-30 23:47:05,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:47:05,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606097723] [2023-03-30 23:47:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:47:05,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:47:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat